Red Hat Linux RHEL & SELinux Vulnerabilities & Security Advisories
1648 advisories tracked · Red Hat Security Data API · 2 listed in the CISA Known Exploited Vulnerabilities catalog
Every row below is a published Red Hat Linux advisory that VulniPulse classified as RHEL & SELinux, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 35 critical, 622 high, 819 medium, 170 low.
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Latest Red Hat RHEL & SELinux advisories
High [CVE-2026-53793] rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode
rsync before 3.5.0 contains a path confinement bypass vulnerability that allows remote clients to escape the intended inner-module root confinement by constructing paths that resolve outside the chroot boundary when the module root contains a /./ boundary marker. Attackers can exploit improper handling of the /./ notation or forge delta-basis transfers referencing xname paths that cross the /./ boundary to gain unauthorized read or write access to files outside the module's subtree. A flaw was found in rsync. This vulnerability allows remote clients to bypass path confinement, a security measure designed to restrict file access. By crafting specific paths that include a '/./' boundary marker within a chroot environment, an attacker can gain unauthorized read or write access to files outside the intended module's directory. This could lead to sensitive information disclosure or data manipulation. Successful exploitation could lead to unauthorized read and write access to files outside the intended chroot environment, though the attack complexity is high. Red Hat severity: Important — CVSS 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-59. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4.
High [CVE-2026-53791] rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address. This allows unauthorized access to restricted resources. Note: Red Hat Enterprise Linux 8 and earlier versions do not contain the vulnerable PROXY protocol implementation and are not affected. Red Hat severity: Important — CVSS 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-290. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:67463, RHSA-2026:67462. Affected products named by the advisory: Red Hat package: rsync.
High [CVE-2026-53790] rsync < 3.5.0 Command Injection via Multiple Code Paths
rsync before 3.5.0 contains multiple command and argument injection vulnerabilities that allow attackers to execute arbitrary commands by supplying malicious input through several code paths, including the RSYNC_CONNECT_PROG environment variable, daemon hooks, the rsync-ssl wrapper, and remote-shell command newline injection. Attackers can inject shell metacharacters or newline characters into unsanitized user-supplied values such as hostnames and hostspecs to execute arbitrary commands under the privileges of the rsync process or the invoking user. This Important vulnerability in rsync allows for remote command injection due to insufficient sanitization of user-supplied input across multiple code paths. While the attack complexity is high, successful exploitation could lead to arbitrary command execution under the privileges of the rsync process or the invoking user, impacting confidentiality, integrity, and availability. This risk is particularly relevant in environments where rsync is used for remote synchronization with untrusted sources or destinations. Red Hat severity: Important — CVSS 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-78. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4.
High [CVE-2026-53785] Arbitrary file write via path traversal in --relative mode
rsync before 3.5.0 contains a path traversal vulnerability that allows a malicious sender to write files outside the intended destination directory tree by crafting relative paths with symlink components in --relative mode. The make_path() function follows symlinks pointing outside the destination tree while creating intermediate directories without verifying that created paths remain within the destination boundary, enabling arbitrary file writes on the receiver's filesystem. This is an Important vulnerability in rsync where a malicious sender can achieve arbitrary file writes on a receiving system when the `--relative` mode is used. The risk is present in environments where rsync is configured to pull data from untrusted sources with the `--relative` option. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H). Weakness: CWE-59. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:67463, RHSA-2026:67462. Affected products named by the advisory: Red Hat package: rsync.
High [CVE-2026-53784] Unauthorized File Access via Symlink Module Root
rsync before 3.5.0 contains a path traversal vulnerability that allows remote clients to access files outside the intended module root when use chroot is disabled and the module root path or a component of it is a symlink. The daemon calls chdir() to the module root at session initialization without resolving symlinks via realpath() or equivalent, causing subsequent relative-path operations to reference files relative to the symlink target rather than the intended module root, enabling unauthorized file access. A flaw was found in rsync. This is an Important flaw. The rsync daemon is vulnerable to unauthorized file access via path traversal when configured with a symlinked module root and the `use chroot` option is explicitly disabled. This configuration is not default, but if present, a local attacker with low privileges could exploit this to read or write files outside the intended module root. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-59. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:67463, RHSA-2026:67462. Affected products named by the advisory: Red Hat package: rsync.
High [CVE-2026-53783] Directory escape via TOCTOU race condition in rrsync
rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree. By replacing a validated path component with a symbolic link prior to file transfer execution, an attacker can bypass intended boundary controls and read or write arbitrary files outside the designated directory. An Important TOCTOU race condition in rsync's rrsync wrapper allows authenticated users to manipulate symlinks and escape directory boundaries, granting unauthorized read and write access to files outside the intended subtree. Red Hat severity: Important — CVSS 8.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-59. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8. Red Hat lists Red Hat OpenShift Container Platform 4 as not affected. Red Hat fixing advisory: RHSA-2026:67463, RHSA-2026:67462.
High [CVE-2026-53803] Local Privilege Escalation via Symlink Following
rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon configurations. This Important vulnerability in rsync allows a local attacker to achieve privilege escalation by exploiting a symlink following flaw. In Red Hat environments, the risk is elevated when rsync is configured to run with elevated privileges, such as setuid or in daemon mode, enabling an attacker to overwrite arbitrary files. The requirement for local access and specific privileged configurations prevents a Critical impact. Red Hat severity: Important — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-59. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:67463, RHSA-2026:67462. Affected products named by the advisory: Red Hat package: rsync.
High [CVE-2026-14456] Denial of Service via unbounded memory growth in QUIC server
Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes valid QUIC Initial packets for unknown destination connection IDs, it can allocate and queue new incoming channels without enforcing any limit. Impact summary: A remote peer that can make many Initial packets reach the server listener faster than the application accepts connections, can cause the memory allocated to store the per-channel state to grow without any limits, potentially making the QUIC listener unavailable and causing Denial of Service. CWE: CWE-770: Allocation of Resources Without Limits or Throttling Description: The function that handles inbound QUIC packets uses Connection-Id from the packet header to find an existing connection (QUIC channel). If no existing connection is found and the packet type is INITIAL, the function treats the packet as a new connection. It allocates a new channel object and inserts it into a queue where it waits to be accepted by the local application with SSL_accept(3ossl). The memory occupied by these initial channel objects may grow without bounds if the application is not able to call SSL_accept() frequently enough to serve these inbound connection requests. The issue is present since OpenSSL 3.5 when the QUIC server implementation was added. The fix introduces a limit for pending connections.
High [CVE-2026-6471] Arbitrary code execution via logical decoding plugin
Missing authorization in PostgreSQL logical decoding allows a non-superuser holding REPLICATION privilege to dlopen any file visible to the operating system account running the server, via the choice of logical decoding plugin. This in turn runs arbitrary code as that account. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL. Exploitation requires an attacker to already have significant access to the database, specifically the REPLICATION role, which is not granted by default to typical users, thus reducing the overall risk. Red Hat severity: Important — CVSS 7.2 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-94. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 10 more.
High [CVE-2026-14671] Arbitrary code execution via type confusion in 'refint' module
Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating system user running the database. The fix for this emerged as a non-security bug report, and the fix appear in the git repository with subject "refint: Remove plan cache.", without a CVE number. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL. This could lead to a complete compromise of the database server. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-843. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2. Red Hat lists Red Hat Hardened Images as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
High [CVE-2026-6464] PostgreSQL psql: Arbitrary command execution via untrusted data in COPY FROM STDIN
Untrusted data inclusion in PostgreSQL psql COPY may allow a server administrator to elicit execution of data lines as psql commands, via error injection. If the "COPY FROM STDIN" or "\copy FROM STDIN" command fails before the server indicates that it awaits input rows, psql processes the in-line data rows as psql commands. "COPY FROM" with a filename is unaffected. The server administrator has no inherent control over the data rows, so a complete attack requires the attacker to separately acquire control of both the server and the data rows. Alternatively, an attacker controlling data rows alone might complete an attack through a coincidental error that they don't control. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. During the `COPY FROM STDIN` operation, untrusted data can be mistakenly interpreted as psql commands if an error injection causes the command to fail prematurely. This could allow an attacker to achieve arbitrary command execution. Successful exploitation requires the attacker to control both the server and the data being copied, or to leverage a coincidental error while controlling only the data. Red Hat severity: Important — CVSS 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-829.
High [CVE-2026-19385] PostgreSQL pg_dump: Arbitrary code execution via crafted transform lists
Heap buffer overflow in PostgreSQL pg_dump of long function transform lists allows an object creator to execute arbitrary code as the operating system user running pg_dump, via a crafted transform list. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. An authenticated object creator can exploit this by providing a specially crafted transform list. Attackers with object-creation privileges can use crafted function transform lists to run OS commands as the backup user. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-122. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 11 more.
High [CVE-2026-18408] Arbitrary code execution via untrusted data inclusion in pg_dump
Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \restrict meta-command input expansion. The fix for CVE-2025-8714 introduced \restrict and \unrestrict to block this attack, but \unrestrict itself was sufficient for an attack. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-format dump. Non-core use of \restrict would be affected, but we've not identified non-core use. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. An Important-rated vulnerability in PostgreSQL allows a malicious superuser on an origin server to compromise client systems during a database restore. By injecting arbitrary code into a database dump, the attacker can trigger execution when the file is processed by a victim's psql client. This runs the malicious code with the operating system privileges of the user performing the restore, effectively escalating access from the compromised database server to the client machine. Red Hat severity: Important — CVSS 8.4 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-829.
High [CVE-2026-16239] Arbitrary code execution via type confusion in cursor lifecycle
Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL. Successful exploitation could lead to a complete compromise of the database system. This is an Important vulnerability in PostgreSQL. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-843. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 12 more.
High [CVE-2026-16238] Arbitrary code execution via type confusion in pg_restore_attribute_stats
Type confusion in PostgreSQL pg_restore_attribute_stats() allows an object creator to execute arbitrary code as the operating system user running the database, via conflation of range and multirange values. Within major version 18, minor versions before PostgreSQL 18.5 are affected. A flaw was found in PostgreSQL. This could lead to a complete compromise of the database system. Note: Red Hat Enterprise Linux 9.6 and earlier releases do not ship the vulnerable PostgreSQL major version (18.x) and are therefore not affected. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-843. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Self-service automation portal 2 as not affected. Red Hat fixing advisory: RHSA-2026:67280, RHSA-2026:67848. Affected products named by the advisory: Red Hat package: postgresql18.
High [CVE-2026-15742] PostgreSQL fuzzystrmatch: Arbitrary code execution via integer wraparound
Integer wraparound in PostgreSQL fuzzystrmatch allows a user to direct writes to a huge range of addresses, executing arbitrary code as the operating system user running the database, via extreme inputs to SQL function levenshtein() or levenshtein_less_equal(). Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. This vulnerability in the PostgreSQL `fuzzystrmatch` extension is rated as Important. This risk is present only when the `fuzzystrmatch` extension is explicitly installed and utilized, as it is not enabled by default in Red Hat deployments. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-190. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 12 more.
High [CVE-2026-15741] Privilege escalation via SQL injection in EXTRACT deparse
SQL injection in PostgreSQL EXTRACT() deparse allows an object owner to execute arbitrary SQL as a superuser via a hostile object definition. Attacks affect expression deparse consumers broadly, including pg_dump, psql commands like \sf, and any similar usage in non-core tools. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. By defining a hostile database object, an attacker can achieve privilege escalation when deparsing tools like pg_dump or psql inspect or export the object. This poses a significant risk to environments where non-administrative users are granted object creation rights. Red Hat severity: Important — CVSS 8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-89. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2. Red Hat lists Red Hat Hardened Images as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
High [CVE-2026-14680] Arbitrary code execution via type confusion with "internal" arguments
Type confusion with PostgreSQL "internal" data type arguments allows any user to execute arbitrary code as the operating system user running the database, via calls to functions with that argument type. Type "internal" represents a class of mutually-incompatible data structures not intended for access from SQL. The system intended to prevent such function calls, but this prevention had gaps. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. This type confusion flaw bypasses intended security boundaries for 'internal' data types, leading to a significant privilege escalation and potential compromise of the entire database server. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-843. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 12 more.
High [CVE-2026-14679] Stack buffer overflow via OUT parameter count manipulation
Stack buffer overflow in PostgreSQL argument name matching allows an object creator to achieve unknown impacts via OUT parameter count. The attack can write only 0x0 and 0x1 bytes. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL. While requiring existing database privileges, successful exploitation could lead to service disruption and minor data integrity issues, elevating the risk beyond a Moderate classification. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H). Weakness: CWE-121. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2. Red Hat lists Red Hat Hardened Images as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
High [CVE-2026-14677] Arbitrary code execution in 32-bit pltcl and plperl
Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. A flaw was found in PostgreSQL. Exploitation requires specific conditions related to 32-bit environments and the ability to create objects within the database. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-190. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 12 more.