Description
A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
Affected products
tigervnc: tigervnc; x.org: x server; x.org: xwayland; fedoraproject: fedora; redhat: enterprise linux; redhat: enterprise linux desktop; redhat: enterprise linux for ibm z systems; redhat: enterprise linux for power big endian; redhat: enterprise linux for power little endian; redhat: enterprise linux for scientific computing; redhat: enterprise linux server; redhat: enterprise linux workstation
References10
- access.redhat.com/errata/RHSA-2024:0320 Third Party Advisory
- access.redhat.com/errata/RHSA-2024:2169
- access.redhat.com/errata/RHSA-2024:2170
- access.redhat.com/errata/RHSA-2024:2995
- access.redhat.com/errata/RHSA-2024:2996
- access.redhat.com/security/cve/CVE-2024-0408 Third Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2257689 Issue Tracking
- access.redhat.com/errata/RHSA-2024:0320 Third Party Advisory
- access.redhat.com/errata/RHSA-2024:2169
- access.redhat.com/errata/RHSA-2024:2170
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 25 · as of 5 November 2026
- CWE
- CWE-158
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