Red Hat Security Advisory: xorg-x11-server security update

Fixed packages 42

Vulnerabilities 3

• High 7.3
  CVE-2025-62229

  Xorg: xmayland: use-after-free in xpresentnotify structure creation

  A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption…

  Red Hat X.Org Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Oct 30, 2025
• High 7.3
  CVE-2025-62230

  Xorg: xwayland: use-after-free in xkb client resource removal

  A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memo…

  Red Hat X.Org Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Oct 30, 2025
• High 7.3
  CVE-2025-62231

  Xorg: xmayland: value overflow in xkbsetcompatmap()

  A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overfl…

  Red Hat X.Org Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Linux Debian Ubuntu Azure Linux Alpine
  Oct 30, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2402649
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2402653
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2402660
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_22427.json
• report
  https://access.redhat.com/security/cve/CVE-2025-62229
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-62229
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-62229
• article
  https://lists.x.org/archives/xorg-announce/2025-October/003635.html
• report
  https://access.redhat.com/security/cve/CVE-2025-62230
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-62230
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-62230
• report
  https://access.redhat.com/security/cve/CVE-2025-62231
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-62231
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-62231