Red Hat Security Advisory: xorg-x11-server security update
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors (CVE-2025-49175) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in Big Requests Extension (CVE-2025-49176) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Unprocessed Client Request Due to Bytes to Ignore (CVE-2025-49178) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer overflow in X Record extension (CVE-2025-49179) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in X Resize, Rotate and Reflect (RandR) Extension (CVE-2025-49180) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
Red Hat Product Security issued an advisory (RHSA-2025:10351) for xorg-x11-server in Red Hat Enterprise Linux 9.4 Extended Update Support, addressing five vulnerabilities (CVE-2025-49175, CVE-2025-49176, CVE-2025-49178, CVE-2025-49179, CVE-2025-49180). The issues include out-of-bounds read and multiple integer overflow flaws in Xwayland and tigervnc components affecting extensions such as X Rendering Animated Cursors, Big Requests, X Record, and RandR. These vulnerabilities could potentially lead to memory corruption or crashes. The advisory provides updated packages to fix these vulnerabilities.
Potential Impact
The vulnerabilities involve out-of-bounds reads and integer overflows in critical X Window System extensions, which could lead to memory corruption or denial of service conditions. The advisory rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages for Red Hat Enterprise Linux 9.4 Extended Update Support that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2025:10351 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official update.
Red Hat Security Advisory: xorg-x11-server security update
Description
X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors (CVE-2025-49175) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in Big Requests Extension (CVE-2025-49176) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Unprocessed Client Request Due to Bytes to Ignore (CVE-2025-49178) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer overflow in X Record extension (CVE-2025-49179) * xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in X Resize, Rotate and Reflect (RandR) Extension (CVE-2025-49180) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security issued an advisory (RHSA-2025:10351) for xorg-x11-server in Red Hat Enterprise Linux 9.4 Extended Update Support, addressing five vulnerabilities (CVE-2025-49175, CVE-2025-49176, CVE-2025-49178, CVE-2025-49179, CVE-2025-49180). The issues include out-of-bounds read and multiple integer overflow flaws in Xwayland and tigervnc components affecting extensions such as X Rendering Animated Cursors, Big Requests, X Record, and RandR. These vulnerabilities could potentially lead to memory corruption or crashes. The advisory provides updated packages to fix these vulnerabilities.
Potential Impact
The vulnerabilities involve out-of-bounds reads and integer overflows in critical X Window System extensions, which could lead to memory corruption or denial of service conditions. The advisory rates the security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated xorg-x11-server packages for Red Hat Enterprise Linux 9.4 Extended Update Support that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2025:10351 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:10351
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-49176","CVE-2025-49178","CVE-2025-49179","CVE-2025-49180"]
- Cvss Version
- null
Threat ID: 6a3da1e94853345fc182f5b7
Added to database: 06/25/2026, 21:47:21 UTC
Last enriched: 06/25/2026, 22:37:04 UTC
Last updated: 06/29/2026, 03:51:09 UTC
Views: 3
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