High RHSA-2025:22667 3 CVEs

Red Hat Security Advisory: tigervnc security update

Published Dec 4, 2025 · Updated Jul 12, 2026

Ecosystem: Red Hat

Fixed packages 5

Release	Package	Fixed in
Red Hat · RHEL 6 ELS rhel_els:6	tigervnc	0:1.1.0-25.el6_10.15
Red Hat · RHEL 6 ELS rhel_els:6	tigervnc-debuginfo	0:1.1.0-25.el6_10.15
Red Hat · RHEL 6 ELS rhel_els:6	tigervnc-server	0:1.1.0-25.el6_10.15
Red Hat · RHEL 6 ELS rhel_els:6	tigervnc-server-applet	0:1.1.0-25.el6_10.15
Red Hat · RHEL 6 ELS rhel_els:6	tigervnc-server-module	0:1.1.0-25.el6_10.15

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/#important
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_22667.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