CVE-2026-34001: Expired Pointer Dereference in Red Hat Red Hat Enterprise Linux 10
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.
AI Analysis
Technical Summary
This vulnerability involves an expired pointer dereference (use-after-free) in the X.Org X server's XSYNC fence triggering logic, specifically in the miSyncTriggerFence() function. Exploitation requires local access to the X11 server and does not require user interaction. Successful exploitation can cause the X server to crash and may enable memory corruption, leading to denial of service or potential further compromise of the affected Red Hat Enterprise Linux 10 system. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vendor advisory from Red Hat does not currently specify an available patch or remediation status.
Potential Impact
The impact includes potential denial of service due to server crashes and possible memory corruption that could allow further system compromise. The vulnerability affects the confidentiality, integrity, and availability of the system as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-34001 for current remediation guidance. Until an official fix is released, limit access to the X11 server to trusted users only to reduce the risk of exploitation. Monitor the vendor advisory for updates on patches or workarounds.
CVE-2026-34001: Expired Pointer Dereference in Red Hat Red Hat Enterprise Linux 10
Description
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an expired pointer dereference (use-after-free) in the X.Org X server's XSYNC fence triggering logic, specifically in the miSyncTriggerFence() function. Exploitation requires local access to the X11 server and does not require user interaction. Successful exploitation can cause the X server to crash and may enable memory corruption, leading to denial of service or potential further compromise of the affected Red Hat Enterprise Linux 10 system. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. The vendor advisory from Red Hat does not currently specify an available patch or remediation status.
Potential Impact
The impact includes potential denial of service due to server crashes and possible memory corruption that could allow further system compromise. The vulnerability affects the confidentiality, integrity, and availability of the system as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-34001 for current remediation guidance. Until an official fix is released, limit access to the X11 server to trusted users only to reduce the risk of exploitation. Monitor the vendor advisory for updates on patches or workarounds.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-03-25T04:53:13.615Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-34001","vendor":"Red Hat"}]
Threat ID: 69ea9e7887115cfb686fc3ff
Added to database: 4/23/2026, 10:34:32 PM
Last enriched: 4/23/2026, 10:35:00 PM
Last updated: 4/24/2026, 6:07:30 AM
Views: 4
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