Red Hat Linux Security Advisories & CVEs
4742 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited backstops use a safe source cadence
Android app · Google Play
Monitor Red Hat CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Security advisories for your Red Hat release
Pick your distribution release to see every advisory issued for it and its severity mix. Fixes ship as errata — keep the system patched. This is the release's advisory history, not a per-package scan.
Official source
Red Hat Security Data API
Red Hat Enterprise Linux errata (RHSA) via the official Red Hat Security Data API — CVE severity, CVSS and affected packages. A credential-free official source.
Latest Red Hat advisories
High [CVE-2026-53309] fix off-by-one in dlm_match_regions region comparison
In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qr_regions. The other loops in the same function correctly use '<'. Fix the loop condition to use '<' for consistency and correctness. A flaw was found in the Linux kernel's OCFS2 Distributed Lock Manager (DLM) component. This out-of-bounds read could lead to system instability or crashes. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L). Weakness: CWE-125. 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 as not affected.
High [CVE-2026-40941] Package Import Signature Validation Bypass Allows Self-Signed Packages
Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have a package import signature validation bypass allows which allows self-signed packages. This issue has been fixed in version 1.2.31. By exploiting this flaw, an attacker can import self-signed packages, potentially leading to the execution of unauthorized code or compromise of system integrity. This could lead to the execution of arbitrary code with the privileges of the Cacti application, potentially compromising the integrity and availability of the system. Exploitation requires an attacker to have privileges to import packages. 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-347.
High [CVE-2026-13281] Integer overflow in Mojo
Integer overflow in Mojo in Google Chrome prior to 149.0.7827.201 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a malicious file. (Chromium security severity: High) Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N). Weakness: CWE-190.
High [CVE-2026-48702] Denial of Service due to unbounded gzip decompression in Alpine APK parsing
Rekor is a software supply chain transparency log. Starting in version 0.3.0 and prior to version 1.5.2, the `Package. Unmarshal()` function in `pkg/types/alpine/apk.go` decompresses the signature and control gzip members of an APK file into in-memory buffers without bounding the total decompressed size. The existing `max_apk_metadata_size` check (default 1MB) is only applied to individual tar entry header sizes after decompression completes, so it does not prevent a decompression bomb from consuming unbounded heap memory. An attacker can craft a gzip stream that compresses at a ~1000:1 ratio (e.g., 2MB compressed zeros → 2GB decompressed). When submitted as spec.package.content in an Alpine `ProposedEntry`, the server decompresses the full payload into memory during request processing, triggering a fatal Go runtime out-of-memory error or OS OOM-kill that cannot be caught by the server's recover() middleware. This is reachable via two unauthenticated endpoints, `POST /api/v1/log/entries (createLogEntry)` and `POST /api/v1/log/entries/retrieve (searchLogQuery)`. Both invoke `V001Entry. Canonicalize()` → `fetchExternalEntities()` → `apk. Unmarshal(packageData)`, which performs the unbounded decompression. Version 1.5.2 patches the issue. There is no effective workaround.
High [CVE-2026-56766] Remote Code Execution via NTLM Authentication Stack Buffer Overflow
Hydra through 9.7, fixed in commit 9cc84c2, contains a stack buffer overflow in NTLM authentication across SMTP, POP3, IMAP, NNTP, HTTP, HTTP-Proxy, and HTTP-Proxy-Urlenum modules when processing malicious NTLM Type-2 challenges. A malicious server can send a crafted NTLM Type-2 challenge with an excessively long domain string, causing base64-encoded response data to overflow a 500-byte stack buffer by 18 to 330 bytes, enabling remote code execution on systems without stack protection. A flaw was found in Hydra. An important security flaw in the Hydra tool lets a malicious server take control of your computer. For an attack to work, you must be tricked into actively connecting Hydra to the attacker's rigged server. The standard security features built into Red Hat systems act as a safety net, making it very difficult for attackers to actually exploit this issue. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-120.
High [CVE-2026-48995] Supply chain compromise from unverified dependencies
pnpm is a package manager. Prior to 10.33.4 and 11.0.7, a malicious codeload.github.com server can serve whatever tarball it wants and pnpm will install it regardless of the lockfile. The lockfile does not store the hash of the dependencies from. This means that if this server was compromised or a person's machine configuration was compromised, pnpm would download and install these dependencies. This vulnerability is fixed in 10.33.4 and 11.0.7. This vulnerability allows a remote attacker to serve malicious software packages if the `codeload.github.com` server is compromised or a user's machine configuration is tampered with. This could lead to the installation of unverified and potentially malicious code, resulting in arbitrary code execution on the affected system. This Important vulnerability in pnpm, as shipped in Red Hat products, exposes users to supply chain attacks by failing to verify the integrity of dependencies sourced from `codeload.github.com`. This risk is heightened in environments where developers rely on GitHub git dependencies without additional integrity checks. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-494. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-50016] Arbitrary code execution due to path traversal in dependency aliases
pnpm is a package manager. During install, pnpm later uses that alias as a filesystem path when linking dependency nodes. This vulnerability is fixed in 10.34.0 and 11.4.0. This vulnerability allows a malicious registry package to include specially crafted dependency aliases that contain path traversal segments. During the installation process, pnpm incorrectly processes these aliases, which can lead to the replacement of legitimate project paths with symbolic links (symlinks) pointing to directories controlled by an attacker. This could enable an attacker to execute arbitrary code or manipulate project files, severely impacting the integrity and security of the project. During installation, even with `--ignore-scripts`, specially crafted dependency aliases can lead to path traversal, replacing legitimate project files with symlinks to attacker-controlled directories. This bypasses expected security measures and can compromise the integrity of a project when subsequent commands are executed. 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-22. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-50015] Arbitrary file write/delete due to lack of path validation in patch files
pnpm is a package manager. An attacker who contributes a malicious patch file via a pull request can write attacker-controlled content to or delete arbitrary files on the filesystem during pnpm install, as the user running the install. The diff --git header paths containing../../ sequences traverse out of the package directory, and the traversal is difficult to catch in code review because patch file diff headers are opaque to most reviewers. This vulnerability is fixed in 10.34.0 and 11.4.0. A flaw was found in pnpm. During the pnpm install process, the patch application pipeline fails to validate file paths extracted from these patch files. This allows the attacker to write or delete arbitrary files on the filesystem, potentially leading to arbitrary code execution or privilege escalation on the system where pnpm install is executed. This is due to insufficient path validation within the patch application pipeline, allowing directory traversal and potentially leading to arbitrary code execution or privilege escalation on the system where the installation is performed. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H). Weakness: CWE-22. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-50021] Integrity bypass allows installation of altered packages via modified lockfile
pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm's tarball extraction worker skips integrity verification when the integrity field is absent from the lockfile resolution. This vulnerability is fixed in 10.34.0 and 11.4.0. This can lead to the execution of arbitrary code or other malicious activities on the system. This poses a significant risk in environments where both lockfile modification and registry control are possible, leading to potential arbitrary code execution. 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-494. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-55700] Unauthorized file modification via crafted package manifest
pnpm is a package manager. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3. This could allow the attacker to write files to arbitrary locations on the system, leading to unauthorized modification of system files and potential integrity compromise. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L). Weakness: CWE-22. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-55698] Arbitrary code execution via malicious package-manager lockfile
pnpm is a package manager. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions. This vulnerability is fixed in 10.34.2 and 11.5.3. This can cause pnpm to install and execute attacker-controlled code during automatic version switching. This can lead to the execution of attacker-controlled code when pnpm is used to install dependencies from such a repository, posing a significant supply chain risk. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-502. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-55697] Arbitrary code execution via improper handling of config dependencies
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can install configDependencies declared in pnpm-workspace.yaml before command dispatch. Before the patch, a repository could declare pacquet or @pnpm/pacquet as a config dependency and pnpm treated that repository-controlled dependency as an install-engine opt-in. During install, pnpm resolved a platform-specific @pacquet/-/pacquet binary from node_modules/.pnpm-config/ and spawned it as the developer or CI user. This vulnerability is fixed in 10.34.2 and 11.5.3. A remote attacker could exploit this vulnerability by crafting a malicious repository that declares a configDependency in its pnpm-workspace.yaml file. When a user installs packages from this repository, pnpm improperly treats the declared dependency as an install-engine opt-in, leading to the execution of a malicious binary. This allows for arbitrary code execution on the system of the developer or continuous integration (CI) user. A remote attacker could exploit this by crafting a malicious repository that, when used by a developer or CI system, leads to the execution of a malicious binary. This vulnerability arises from pnpm's improper handling of `configDependencies` declared in `pnpm-workspace.yaml`, allowing an untrusted repository to opt into a native install engine.
High [CVE-2026-55487] Supply chain compromise via manipulated package source strings
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3. This vulnerability allows a remote attacker to bypass security checks by manipulating how package source strings are processed. By crafting a specially designed source string, an attacker could trick the system into approving and using a malicious package instead of the intended one. This could lead to the execution of unauthorized code or the installation of harmful software, severely impacting the confidentiality, integrity, and availability of the system. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-140. Red Hat lists Red Hat AMQ Broker 7; Red Hat Build of Keycloak; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected.
High [CVE-2026-9099] Group-Admin Escalation to Realm-Admin
A flaw was found in Keycloak. A missing authorization check in the GroupResource.addChild() endpoint within the Admin REST API allows an authenticated user with limited administrative privileges to reparent any existing group. When Fine-Grained Admin Permissions v2 (FGAPv2) is enabled, an attacker with management rights over a single low-privilege group can reparent a highly privileged group (such as one possessing the realm-admin role) under their managed group. Because group permissions follow a hierarchical structure, this action unauthorizedly grants the attacker management and password-reset capabilities over the members of the targeted privileged group. An attacker can exploit this to reset an administrator's password, compromise the account, and achieve a full realm takeover, leading to a complete compromise of confidentiality, integrity, and availability. This vulnerability is rated as High impact. When Fine-Grained Admin Permissions (FGAPv2) are enabled in Keycloak, a delegated administrator with specific `manage-members` permissions on a low-privilege group can bypass authorization checks to reparent any other group, including those with `realm-admin` roles. Red Hat severity: Important — CVSS 7.7 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N). Weakness: CWE-639.
High [CVE-2026-9086] Cross-site scripting (XSS) via case-insensitive URI validation bypass
A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive `javascript:` or `data:` scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console. This flaw is rated as High. Keycloak's client URI validation is vulnerable to a case-insensitivity issue, allowing attackers to bypass scheme blocklists by using mixed-case `javascript:` or `data:` URIs. Exploitation requires an authenticated administrator with `manage-client` privileges or access to client registration endpoints, and user interaction. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N). Weakness: CWE-79. Affected Red Hat products: Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.4.13; Red Hat build of Keycloak 26.6; Red Hat build of Keycloak 26.6.4. Red Hat fixing advisory: RHSA-2026:30050, RHSA-2026:30049, RHSA-2026:30084, RHSA-2026:30083.
High [CVE-2026-55693] Out-of-bounds Write in Spell File Word Count
Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a depth counter. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (arridx[], curi[], wordcount[]). A crafted.spl/.sug file pair, loaded when the user invokes spell suggestion, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0653. A remote attacker could exploit this vulnerability by tricking a user into loading a specially crafted spell file. This Moderate impact vulnerability in Vim's spell suggestion feature allows an attacker to cause a denial of service. This requires user interaction and a malicious file, limiting its immediate exploitability. Red Hat severity: Moderate — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H). Weakness: CWE-120. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; and 6 more.
High [CVE-2026-55895] Arbitrary code execution via Vimscript code injection in netrw plugin
Vim is an open source, command line text editor. Prior to 9.2.0663, a Vimscript code injection vulnerability exists in s:NetrwLocalRmFile() in the netrw plugin (runtime/pack/dist/opt/netrw/autoload/netrw.vim) when deleting a local file from the browser. A filename derived from the buffer's directory listing is interpolated into an Ex command line passed to:execute with only the backslash character escaped, allowing a crafted filename containing a bar (|) to terminate the intended command and execute arbitrary Vimscript, including shell commands via:call system() and:!. This vulnerability is fixed in 9.2.0663. A flaw was found in Vim, specifically within the netrw plugin. A local user could exploit a Vimscript code injection vulnerability by attempting to delete a specially crafted local file from the browser. This could lead to arbitrary code execution on the affected system. This is an Important vulnerability in Vim's netrw plugin that could lead to arbitrary code execution. This risk is mitigated by the requirement for local user interaction and a specific sequence of actions. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-94.
High [CVE-2026-57456] Arbitrary code execution via malicious docstrings in Python omni-completion
Vim is an open source, command line text editor. Prior to 9.2.0699, Vim's Python omni-completion (runtime/autoload/python3complete.vim and the legacy pythoncomplete.vim) executes reconstructed function and class definitions from the current buffer with exec() as part of populating the completion dictionary. When reconstructing that source, each scope's docstring is inserted verbatim between triple quotes with no escaping, so a hostile buffer can break out of the triple-quoted literal and execute attacker-controlled Python during omni-completion. This vulnerability is fixed in 9.2.0699. There is a security flaw in Vim. If you use Vim to open a malicious file written by a hacker, and you use the auto-complete feature while typing, the file can secretly force your computer to run unauthorized commands or malware. This flaw is rated as Important. A vulnerability in Vim's Python omni-completion feature allows for arbitrary code execution. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 6 Extended Lifecycle Support - EXTENSION; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; and 6 more.
High [CVE-2026-12244] A specially crafted SVCB RR can cause a heap overflow of up to 65509 attacker controlled bytes.
If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes A flaw was found in nsd. When nsd is configured as a secondary server for a zone, a remote attacker, acting as the primary server for that zone, can send a specially crafted DNS message within an AXFR (Asynchronous Full Zone Transfer) request. This message, containing a malformed SVCB (Service Binding) resource record, can cause a heap overflow, leading to arbitrary code execution. This vulnerability poses a significant risk, especially in multi-tenant secondary DNS deployments, due to the potential for a controlled write of a large amount of data. This can lead to arbitrary code execution on the secondary NSD server. The risk is particularly significant in multi-tenant environments where NSD serves as a secondary for multiple zones, as a compromised primary could exploit this flaw within NSD's trust boundary. This vulnerability doesn't affect any supported Red Hat Product. Red Hat severity: Important — CVSS 8 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
High [CVE-2026-12245] Denial of DNS over TLS service by any DoT client
NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response. A flaw was found in NSD. When NSD is configured with DNS over TLS (DoT), a remote attacker can exploit a vulnerability by performing a TLS action and then prematurely closing the connection. This action causes the server process to crash and restart. By repeatedly exploiting this flaw, an attacker can keep the server in a continuous crash-restart loop, leading to a denial of service for DoT clients. This impact is significant for environments relying on DoT for secure DNS resolution. This vulnerability doesn't affect any supported Red Hat Product. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-617.