Red Hat Linux Security Advisories & CVEs
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Latest Red Hat advisories
Medium [CVE-2026-56297] Remote code execution or denial of service via use-after-free race condition
FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service. A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can exploit a use-after-free vulnerability due to improper synchronization of channel callback access. This Moderate impact flaw in FreeRDP allows a malicious RDP server to trigger a use-after-free condition on the client by exploiting a race condition during dynamic virtual channel closure. Red Hat severity: Moderate — CVSS 5.6 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L). Weakness: CWE-364. Affected Red Hat products: Red Hat Enterprise Linux 6. 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: freerdp.
Medium [CVE-2026-60001] Brute-force attacks facilitated due to insufficient authentication delay
sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay. A flaw was found in OpenSSH's SSH daemon (sshd). A remote attacker could exploit this vulnerability by repeatedly attempting authentication. The flaw allows the attacker to bypass the intended minimum authentication delay, which can facilitate brute-force attacks. This makes it easier for an attacker to guess valid credentials, potentially leading to unauthorized access or a denial of service. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L). Weakness: CWE-307. Affected Red Hat products: Red Hat Hardened Images; 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 OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:37382. Affected products named by the advisory: Red Hat package: openssh.
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 Hardened Images; 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 OpenShift Container Platform 4. Red Hat fixing advisory: 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 Hardened Images; 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 OpenShift Container Platform 4. Red Hat fixing advisory: 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 Hardened Images; 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 OpenShift Container Platform 4. Red Hat fixing advisory: 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 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-2026:69129, RHSA-2026:69266, RHSA-2026:69130, RHSA-2026:37382. 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.
Medium [CVE-2026-14740] DBI for Perl: Out-of-bounds read in SQL comment processing
DBI versions before 1.650 for Perl read one byte out-of-bounds in preparse when deleting an initial SQL comment. The preparse method normalises SQL and removes comments. When the SQL starts with a comment line, the deletion of that line during normalisation led to an out-of-bounds read by one byte. The result is a fault on memory-hardened builds and nondeterministic newline retention on normal builds. This issue may cause a program fault on systems with memory hardening or result in unpredictable newline retention in other environments. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-125. 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: perl-dbi.
Medium [CVE-2026-58472] Arbitrary code execution or denial of service via crafted HTML attribute
GNU Wget through 1.25.0, fixed in commit dd692d9, contains a heap buffer overflow vulnerability in the html_quote_string() function in src/convert.c that allows a remote attacker to trigger memory corruption by supplying a crafted HTML attribute with a large number of characters requiring entity encoding. A server-supplied HTML attribute causes a signed integer counter to overflow during output size accumulation, resulting in an undersized heap allocation and subsequent heap buffer overflow during the copy phase. This can lead to memory corruption and potentially result in arbitrary code execution or a denial of service. This Moderate impact heap buffer overflow in GNU Wget occurs when processing HTML attributes with extensive entity encoding. Successful exploitation requires user interaction, as a victim must download a specially crafted HTML file, and is further constrained by high attack complexity. This limits the direct risk to Red Hat systems where Wget is typically used for trusted content retrieval. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/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 Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2026:62142, RHSA-2026:62144, RHSA-2026:62143.
Medium [CVE-2026-58471] Heap buffer overflow via server-supplied filename leads to memory corruption
GNU Wget through 1.25.0, fixed in commit c2640fe, contains a heap buffer overflow vulnerability in the convert_fname() function within src/url.c that allows remote attackers to trigger memory corruption through a server-supplied filename requiring character set conversion. When the output buffer is too small during iconv E2BIG reallocation, the reallocation logic miscalculates the remaining space, leading to a heap buffer overflow that can be exploited via a maliciously crafted server response. This occurs when processing a server-supplied filename that requires character set conversion, leading to memory corruption due to incorrect buffer reallocation. This can result in a denial of service or other impacts. Moderate: A heap buffer overflow in GNU Wget, affecting Red Hat Enterprise Linux and other products, can be triggered by a remote attacker. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H). Weakness: CWE-122. Red Hat fixing advisory: RHSA-2026:62142, RHSA-2026:62144, RHSA-2026:62143. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; and 2 more. Affected products named by the advisory: Red Hat Enterprise Linux 7; Red Hat package: wget.
Medium [CVE-2026-58470] Integer overflow in Content-Range header parsing causes download desynchronization
GNU Wget through 1.25.0, fixed in commit 43d3ba9, contains an integer overflow vulnerability in the parse_content_range() function within src/http.c that allows server-controlled values to cause signed integer arithmetic to overflow. Attackers can supply malicious Content-Range header values to trigger undefined behavior and download desynchronization in the affected client. An integer overflow in GNU Wget's parse_content_range() function allows malicious servers to send crafted Content-Range headers. This triggers undefined behavior and download desynchronization, potentially causing a denial of service or data integrity issues for the client. Moderate: GNU Wget is vulnerable to a client-side integer overflow in its Content-Range header processing. If a client connects to an attacker-controlled server, the server can return anomalous headers that cause undefined behavior and stream desynchronization. This results in local data integrity issues or a denial of service, though the impact is strictly limited to the Wget process itself. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-190. 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. Affected products named by the advisory: Red Hat package: wget.
Medium [CVE-2026-58469] Memory corruption via crafted Metalink URL
GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior. This could lead to memory corruption and abnormal program behavior, potentially causing a denial of service. Moderate: A heap-buffer-underread in GNU Wget's clean_metalink_string() function, affecting Red Hat Enterprise Linux 8, can be triggered when wget processes a specially crafted Metalink document containing a resource URL consisting only of whitespace characters. This code path is only reachable when Wget's Metalink support is explicitly requested via --input-metalink or --metalink-over-http; it is not exercised during ordinary downloads. Successful exploitation requires a user to invoke Wget's Metalink handling against an attacker-controlled or compromised server. The out-of-bounds byte is read only to decide whether to continue a trim loop and is never returned, logged, or written -- the practical impact is limited to a crash of the wget process (denial of service), not memory corruption or code execution.
Medium [CVE-2026-14969] Static initialization vector in AES-CBC/3DES-CBC attribute encryption
A flaw was found in 389-ds-base where the LDBM backend attribute encryption uses a hardcoded static initialization vector for AES-CBC and 3DES-CBC operations, allowing an attacker with privileged filesystem access to detect plaintext equality across encrypted entries by comparing ciphertext blocks. This does not enable direct plaintext recovery but allows ciphertext comparison across entries sharing the same attribute value. Exploiting this requires privileged read access to the raw database files on disk, which on Red Hat Enterprise Linux are owned by the dirsrv user with mode 0700. An attacker with this level of access can typically obtain attribute values through more direct means, such as querying LDAP as Directory Manager. The practical risk is limited to scenarios where database files are exposed without the corresponding encryption keys, such as stolen backups. Red Hat rates this Moderate: impact is limited to Confidentiality (C:H) with no Integrity or Availability impact, and exploitation requires local access (AV:L) with high privileges (PR:H). Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-329. Affected products named by the advisory: Red Hat Directory Server 11; Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10; and 5 more.
Medium [CVE-2026-53877] Information disclosure via heap buffer over-read in GDALRaster
An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `django.contrib.gis.gdal.GDALRaster` over-reads its in-memory buffer when constructed from a bytes object, which can disclose adjacent memory or cause service degradation via a potential segmentation fault when the `vsi_buffer` property is accessed. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Bence Nagy for reporting this issue. Instantiating django.contrib.gis.gdal.GDALRaster with a bytes object representing a raster file can trigger a heap buffer over-read in the vsi_buffer property, reading roughly 32 bytes past the end of the allocated buffer. An attacker who can supply crafted raster data may cause disclosure of adjacent heap memory or, in rare cases, crash the application process. This vulnerability in Django is rated as Low impact. Exploitation is difficult due to the limited over-read size and specific input requirements, potentially leading to minor information disclosure or, rarely, a denial of service in Red Hat products that process untrusted geospatial raster data. Red Hat severity: Low — CVSS 4.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-126.
Medium [CVE-2026-14940] heap-buffer-overflow in DN normalization via quoted multivalued RDN
A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative Distinguished Name (RDN), the server can write past the end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated remote attacker can trigger this condition by sending an LDAP operation whose DN reaches the DN normalization routine, such as a search with a crafted base DN. This can corrupt heap memory and may cause denial of service. Red Hat rates this issue as Moderate impact. In 389-ds-base, DN normalization of a crafted legacy-quoted multivalued RDN can corrupt heap memory during internal attribute-value sorting. Any unauthenticated client that can reach the LDAP service and supply a malformed DN in an operation such as search, bind, add, or modify can trigger the bug. In standard production builds, the server often rejects the malformed DN with "Invalid DN syntax" and continues operating; the heap corruption may be silent rather than immediately terminating ns-slapd. Denial of service is more reliably observed when heap debugging is enabled (for example AddressSanitizer or MALLOC_CHECK_=3), or depending on heap layout and subsequent memory allocator activity. There is no configuration switch to disable DN normalization for client-supplied DNs.
Medium [CVE-2025-12799] Jastow Cross-Site Scripting attack due to unsanitized URI
A flaw was found in Jastow. Jastow is vulnerable to Cross-Site Scripting (XSS) attack. If using a set of combined configuration to allow unescaped characters in URL with embedded Undertow and Jastow, a server might be vulnerable to improper input handling. Exploitation requires a specific, non-default configuration, limiting its applicability in typical deployments. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N). Weakness: CWE-79. Affected Red Hat products: Red Hat JBoss Enterprise Application Platform 8.1.7.GA; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8; Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9; Red Hat JBoss Enterprise Application Platform 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat Single Sign-On 7. Red Hat fixing advisory: RHSA-2026:36345, RHSA-2026:36344, RHSA-2026:36342, RHSA-2026:36343.
Medium [CVE-2026-59710] Stored Cross-Site Scripting via unescaped table header ID attributes in markdown
showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdown table headers, achieving stored XSS when untrusted markdown is rendered with the default github flavor configuration. A flaw was found in Showdown. This vulnerability, a stored cross-site scripting (XSS) issue, allows an attacker to inject malicious code into web pages. When untrusted markdown is processed, this can lead to the execution of malicious scripts in a user's web browser, potentially compromising user data or session integrity. Showdown, as integrated into Red Hat products, is susceptible to a stored cross-site scripting vulnerability. Affected versions: <= 2.1.0. Red Hat severity: Moderate — CVSS 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N). Weakness: CWE-79. Affected Red Hat products: Cryostat 4; Multicluster Engine for Kubernetes; Node HealthCheck Operator; Red Hat 3scale API Management Platform 2; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Ansible Automation Platform 2; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4; Red Hat OpenShift Virtualization 4; Red Hat Quay 3.