Red Hat Linux Security Advisories & Vulnerabilities
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Latest Red Hat advisories
Medium [CVE-2026-60000] Denial of Service via excessive GSSAPI authentication attempts
sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication. A flaw was found in OpenSSH's Secure Shell Daemon (sshd). The issue arises from the mishandling of the MaxAuthTries setting specifically when using GSSAPIAuthentication, leading to resource exhaustion. This Moderate impact denial of service flaw in OpenSSH's `sshd` daemon arises from improper handling of `MaxAuthTries` during GSSAPI authentication attempts. Exploitation requires `GSSAPIAuthentication` to be explicitly enabled, which is not the default configuration in Red Hat Enterprise Linux and other affected Red Hat products, thereby limiting the attack surface in typical deployments. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-307. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:85847, RHSA-2026:88211, RHSA-2026:85958, RHSA-2026:37382. Affected products named by the advisory: Red Hat package: openssh.
Medium [CVE-2026-59998] Undocumented GSSAPIStrictAcceptorCheck behavior impacts security in Windows Active Directory
sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory. A flaw was found in OpenSSH. This could lead to unintended information disclosure and impact data integrity. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-909. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:85847, RHSA-2026:88211, RHSA-2026:85958, RHSA-2026:37382. Affected products named by the advisory: Red Hat package: openssh.
Medium [CVE-2026-59997] SFTP security bypass due to command-line argument parsing flaw
internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection. A flaw was found in OpenSSH. This limitation can prevent the application of intended security configurations for SFTP (SSH File Transfer Protocol) connections, potentially leading to a bypass of security properties. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-88. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:85847, RHSA-2026:88211, RHSA-2026:85958, RHSA-2026:37382. Affected products named by the advisory: Red Hat package: openssh.
Medium [CVE-2026-59996] `scp` file misplacement vulnerability during remote copy
scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations. A flaw was found in OpenSSH, a widely used tool for secure remote access. When a user attempts to copy files between two different remote systems using the `scp` command, the file might be incorrectly placed in a directory above the intended destination. This unintended file placement could lead to data integrity issues or, in some cases, unauthorized access to sensitive information if files are stored in an exposed location. Conditions for Exploitation: Exploitation requires specific user actions and conditions, as the vulnerability only triggers when a user explicitly initiates a file copy between two remote destinations using the scp command. Impact Limitations: The boundaries of the potential impact are highly contained. The flaw only results in unintended file placement within the parent directory of the target destination. It does not inherently lead to arbitrary code execution, denial of service, or privilege escalation, and any potential data exposure relies heavily on the existing permissions of the parent directory. Red Hat Enterprise Linux (RHEL) versions 6, 7, and 8 are not affected by this issue. Red Hat severity: Moderate — CVSS 4.6 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L). Weakness: CWE-22.
Medium [CVE-2026-59995] sftp client allows attacker to control downloaded file location
sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path." is used with an attacker-controlled server. A flaw was found in OpenSSH. The `sftp` client, when used to download files from a malicious server with the 'sftp server:/path.' command, does not properly restrict where those files are saved. This allows an attacker to control the download location, potentially overwriting existing files or placing malicious files in sensitive directories on the client system, which could compromise system integrity. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L). Weakness: CWE-22. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Hardened Images; Red Hat OpenShift AI 3.0; Red Hat OpenShift AI 3.2; Red Hat OpenShift AI 3.3; Red Hat OpenShift AI 3.4; Red Hat OpenShift AI 3.5; Red Hat Update Infrastructure 5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat OpenShift Container Platform 4. Affected products named by the advisory: Red Hat package: openssh.
Medium [CVE-2026-56000] GLX contextTags Use-After-Free in CommonMakeCurrent
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory. A flaw was found in the X.org X11 server, specifically within the GLX (OpenGL Extension to the X Window System) dispatch layer. A remote attacker can exploit this vulnerability by sending a series of crafted X11 requests. This can lead to a use-after-free condition, where the server attempts to write data to memory that has already been released. The primary consequence of this memory corruption is a denial of service, potentially causing the X server to crash. An Important use-after-free vulnerability in the X.org X11 server's GLX dispatch layer allows a remote, unauthenticated attacker to trigger a denial of service. This is considered Important due to the remote attack vector and the potential for unauthenticated denial of service. Red Hat severity: Important — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-825. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 8.
Medium [CVE-2026-15044] Unauthenticated access to AI guardrails and orchestrator APIs
A flaw was found in the TrustyAI Service Operator. When deploying services like gorch or NemoGuardrails, if a specific security setting is not enabled, these services can expose their communication channels without requiring users to prove their identity. This allows any other program within the cluster to access the AI guardrails and orchestrator without proper authorization. An attacker could exploit this to gain unauthorized access to sensitive information and potentially make limited changes to the AI models. By default, these services expose plain HTTP endpoints without authentication, enabling any co-located pod to access AI guardrails and orchestrator APIs. This could result in unauthorized access to sensitive data and potential manipulation of AI models. Red Hat severity: Moderate — CVSS 6.3 (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N). Affected Red Hat products: Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-15063] Gorch port bypass when auth IS enabled
A flaw was found in the gorch service template, which is part of the trustyai-service-operator. Even when authentication is enabled, the gorch service exposes unproxied orchestrator and detector metrics ports. This allows any pod on the cluster network to directly access these ports, bypassing the kube-rbac-proxy and its authentication mechanisms. Red Hat severity: Moderate — CVSS 6.3 (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N). Weakness: CWE-306. Affected Red Hat products: Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Low [CVE-2026-15168] Information disclosure in BLF file parser
BLF file parser in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows possible information disclosure A flaw was found in Wireshark. A remote attacker could exploit this vulnerability by enticing a user to open a specially crafted BLF file, leading to the disclosure of sensitive information. Red Hat severity: Low — CVSS 2.5 (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N). Weakness: CWE-237. 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. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: wireshark.
Low [CVE-2026-6352] Auditor-level users can modify compliance records via improper authorization in GraphQL
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with auditor-level access to modify compliance violation records due to improper authorization on certain GraphQL operations. A flaw was found in GitLab Enterprise Edition (EE). This was possible due to improper authorization on certain GraphQL operations, allowing them to bypass intended access controls. Red Hat severity: Low — CVSS 2.7 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N). Weakness: CWE-639. Red Hat lists OpenShift Pipelines; Red Hat OpenShift Container Platform 4 as not affected.
Low [CVE-2026-56362] Magick.NET-Q16-x64: Magick.NET-Q16-x86: Ma…
ImageMagick before 7.1.2-15 contains a heap-buffer-overflow read vulnerability in GetPixelIndex caused by OpenPixelCache updating image channel metadata before pixel cache memory allocation. Attackers can trigger memory and disk allocation failures to cause a heap-buffer-overflow read affecting any writer calling GetPixelIndex. This vulnerability in ImageMagick is rated as Low impact. Exploitation requires an attacker to trigger these specific resource exhaustion conditions, which limits the practical attack surface and reduces the overall risk of information disclosure on standard Red Hat deployments. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: imagemagick.
Low [CVE-2026-56374] Denial of Service and Information Disclosure via heap buffer overflow in FTXT encoder
ImageMagick before 7.1.2-19 contains a heap buffer overflow vulnerability in the FTXT encoder due to missing boundary checks when parsing ftxt:format. Remote attackers can trigger an out of bounds read by crafting malicious FTXT image files to cause denial of service or information disclosure. A remote attacker could exploit this using a specially crafted FTXT image to cause a denial of service or disclose sensitive information. This low-impact heap buffer overflow in ImageMagick's FTXT encoder, caused by insufficient boundary checks, could lead to denial of service or information disclosure if a user opens a specially crafted FTXT file. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: imagemagick.
Low [CVE-2026-15028] heap overflow OOB read while parsing a tar archive contains a PAX extended header
A flaw was found in libarchive. This vulnerability allows a remote attacker to trigger a heap overflow by providing a specially crafted tar archive. The issue occurs during the parsing of a PAX extended header containing a malformed SUN.holesdata sparse-file attribute. Successful exploitation could lead to a denial of service, making the system unavailable, or potentially allow for arbitrary code execution, giving the attacker control over the affected system. Conditions for Exploitation: Successful exploitation requires user interaction or a specific application workflow. Impact Limitations: Although the heap overflow has the potential to allow for arbitrary code execution, achieving this reliably is typically complex and highly dependent on the memory layout and protections of the specific application utilizing the library. In most common scenarios, the malformed archive will simply cause the parsing application to crash, resulting in a localized Denial of Service (DoS) rather than a full system compromise. Red Hat severity: Moderate — CVSS 3.9 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L). Weakness: CWE-805. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Cost Management On-Premise 1; Red Hat Hardened Images; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Low [CVE-2026-15041] Non-constant-time comparison in PBKDF2-SHA256 password verification
A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password verification function uses standard memcmp() for comparing password hashes instead of a constant-time comparison function. A remote attacker could potentially use timing measurements of LDAP bind attempts to infer partial hash information, though practical exploitation is extremely difficult due to PBKDF2 computational overhead. Red Hat severity: Low — CVSS 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-208. Affected Red Hat products: Red Hat Directory Server 11; Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat lists Red Hat Enterprise Linux 6 as not affected. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: 389-ds-base.
High [CVE-2026-14739] Heap overflow when preparsing SQL statements with excessive placeholders
DBI versions before 1.650 for Perl have a heap overflow when preparsing SQL statements with an extreme number of placeholders. The fix for CVE-2026-10879 did not allocate enough memory to handle approximately 1.2-million placeholders. DBI version 1.650 sets a hard limit of 99,999 placeholders. This vulnerability, a heap overflow, occurs when the software attempts to preparse SQL statements containing an extremely large number of placeholders. This could allow a remote attacker to cause a denial of service or potentially execute arbitrary code. A heap overflow can occur when processing SQL statements with an exceptionally large number of placeholders, potentially leading to a denial of service or arbitrary code execution. While requiring an extreme number of placeholders, this flaw could impact applications utilizing DBI in Red Hat environments that handle untrusted or maliciously crafted SQL queries. 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-131. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Insights proxy 1.5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2026:49514, RHSA-2026:52772, RHSA-2026:62667, RHSA-2026:49612, RHSA-2026:53371. Affected products named by the advisory: Red Hat package: perl-dbi.
High [CVE-2026-14380] Arbitrary code execution via caller-influenced Profile attribute
DBI versions before 1.650 for Perl are vulnerable to code injection via caller-influenced Profile. When a string is assigned to a DBI handle's Profile attribute, DBI splits it into path, package and arguments, and interpolates the package part in a string eval with no validation of the package name. Any caller-influenced value that reaches the Profile attribute is therefore arbitrary Perl code execution, including calls to run system commands. The Profile attribute can be set from three different sources that can carry untrusted data: the DBI_PROFILE environment variable, a direct attribute assignment, and a DSN driver-attribute clause dbi:Driver(Profile=>SPEC):db. An attacker controlling any of those inputs runs arbitrary Perl in the host process. The strongest remote position is a network-exposed DBI::Gofer / DBI::ProxyServer whose per-request DSN reaches the Profile attribute, letting a client execute code on the broker host. A flaw was found in the DBI component for Perl. This vulnerability allows an attacker to inject and execute arbitrary code by manipulating the Profile attribute of a DBI handle. When a string is assigned to this attribute, the component processes it without proper validation, enabling the execution of unauthorized Perl code, including system commands.
High [CVE-2026-11610] Heap buffer overflow in sasl_io_recv via padded SASL UNBIND
A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). After a successful SASL bind with integrity protection (SSF > 0), an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet that is copied into a 512-byte heap receive buffer without a bounds check in sasl_io_recv() in sasl_io.c. This allows up to approximately 2 megabytes of attacker-controlled data to overflow the buffer, causing a denial of service (server crash). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, any enrolled host, or any service account can trigger this vulnerability over the network after authenticating via GSSAPI. Red Hat rates this issue as Important impact. Exploitation requires a valid SASL-authenticated LDAP session, not Directory Manager access. Any user who can bind with SASL mechanisms such as GSSAPI/Kerberos or DIGEST-MD5 can trigger the denial of service. In deployments where domain users, enrolled hosts, and service accounts routinely authenticate to the directory over Kerberos, the attack surface includes any such principal with network access to LDAP. This flaw is independent of CVE-2025-14905, which patched a separate heap overflow in schema.c and did not modify sasl_io.c. 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).
High [CVE-2026-14474] sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation
A flaw was found in SSSD's LDAP sudo provider. When the ldap_sudo_search_base option is not explicitly configured, SSSD searches the entire LDAP directory tree for sudoRole objects. An authenticated attacker with write access to any subtree can inject a sudoRole object granting root-level sudo privileges on all SSSD-enrolled hosts. Red Hat has rated this as Important because the attack requires only low-privilege delegated LDAP write access to any subtree, which is a common delegation pattern in enterprise environments. The default ldap_sudo_search_base configuration searches the entire directory tree, allowing sudo rule injection from outside the intended sudoers container. 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-1188. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle 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; and 20 more.
High [CVE-2026-14476] GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass
A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize.. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass. SELinux blocks writes to most security-critical paths such as /etc/cron.d/. Red Hat severity: Moderate — CVSS 8 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H). Weakness: CWE-23. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle 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; and 20 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; and 16 more.
High [CVE-2026-58384] integer overflow in read_rle_channel
A flaw was found in GIMP's PSD parser. An integer overflow in read_RLE_channel() can cause an undersized heap allocation for the RLE row-length table, after which subsequent per-row writes corrupt heap memory. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution. Successful exploitation requires a user to open a specially crafted PSD file. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8 as not affected. Red Hat fixing advisory: RHSA-2026:40751, RHSA-2026:80509, RHSA-2026:73768. Affected products named by the advisory: Red Hat package: gimp.
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