VDB
RHSA-2026:84574
RHSA-2026:84574
PUBLISHED
CVSS 7.800000190734863 HIGH
A flaw was found in xorg-x11-server. A local user can exploit a use-after-free condition—where the software attempts to access memory after it has been freed—by establishing a passive input grab and removing an input device. When subsequent input events are processed, the server dereferences the dangling device pointer. This flaw can lead to arbitrary code execution or a Denial of Service (DoS) via an X server crash.
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-devel-0:1.20.11-34.el9_8.5.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-devel-0:1.20.11-34.el9_8.5.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-debuginfo-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xorg-debuginfo-0:1.20.11-34.el9_8.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xdmx-0:1.20.11-34.el9_8.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xvfb-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_8.5.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-devel-0:1.20.11-34.el9_8.5.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xnest-0:1.20.11-34.el9_8.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-devel-0:1.20.11-34.el9_8.5.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | 0:1.20.11-34.el9_8.5 |
| Red Hat | xorg-x11-server-Xorg-0:1.20.11-34.el9_8.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9) | 0:1.20.11-34.el9_8.5 |
…and 74 more
Timeline
- Oct 19, 2026 CVE Published
- Oct 29, 2026 CVE Updated
- Oct 29, 2026 Distribution Patch
- Oct 29, 2026 Distribution Patch
- Oct 29, 2026 Security Advisory
- Oct 29, 2026 Security Advisory
- Oct 29, 2026 Security Advisory
- Oct 29, 2026 Security Advisory
- Oct 29, 2026 Security Advisory
- Oct 29, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:84574 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2545161 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2545246 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2545860 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2545887 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2545908 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_84574.json advisory
- https://access.redhat.com/security/cve/CVE-2026-93516 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-93516 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-93516 advisory
- https://access.redhat.com/security/cve/CVE-2026-93517 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-93517 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-93517 advisory
- https://access.redhat.com/security/cve/CVE-2026-93518 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-93518 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-93518 advisory
- https://access.redhat.com/security/cve/CVE-2026-93519 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-93519 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-93519 advisory
…and 3 more