CVE-2026-50260: Use After Free in Red Hat Red Hat Enterprise Linux 10
CVE-2026-50260 is a use-after-free vulnerability in the X. Org X server and Xwayland components of Red Hat Enterprise Linux 10. The flaw occurs in the FreeCounter() function when multiple SyncCounters are set up and destroyed via a second client connection, potentially leading to a use-after-free condition. Exploitation may cause the X server to crash or enable privilege escalation if the server runs with root privileges. The vulnerability has a high severity rating with a CVSS score of 7. 8. No official patch or remediation guidance is currently confirmed from the vendor advisory.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free bug in the FreeCounter() function of the X.Org X server and Xwayland on Red Hat Enterprise Linux 10. A client that creates multiple SyncCounters and waits on them can trigger the use-after-free when those counters are destroyed through a second client connection. This flaw can be exploited to crash the X server or escalate privileges if the server runs as root. The CVSS 3.1 score of 7.8 indicates high impact on confidentiality, integrity, and availability. The vendor advisory does not currently specify a patch or remediation level.
Potential Impact
Successful exploitation can lead to denial of service by crashing the X server or privilege escalation if the X server process is running with root privileges. This impacts system availability and security by potentially allowing unauthorized privilege gains. 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-2026-50260 for current remediation guidance. Until an official fix is released, consider limiting access to the X server and monitoring for unusual client behavior that may trigger this vulnerability.
CVE-2026-50260: Use After Free in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-50260 is a use-after-free vulnerability in the X. Org X server and Xwayland components of Red Hat Enterprise Linux 10. The flaw occurs in the FreeCounter() function when multiple SyncCounters are set up and destroyed via a second client connection, potentially leading to a use-after-free condition. Exploitation may cause the X server to crash or enable privilege escalation if the server runs with root privileges. The vulnerability has a high severity rating with a CVSS score of 7. 8. No official patch or remediation guidance is currently confirmed from the vendor advisory.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free bug in the FreeCounter() function of the X.Org X server and Xwayland on Red Hat Enterprise Linux 10. A client that creates multiple SyncCounters and waits on them can trigger the use-after-free when those counters are destroyed through a second client connection. This flaw can be exploited to crash the X server or escalate privileges if the server runs as root. The CVSS 3.1 score of 7.8 indicates high impact on confidentiality, integrity, and availability. The vendor advisory does not currently specify a patch or remediation level.
Potential Impact
Successful exploitation can lead to denial of service by crashing the X server or privilege escalation if the X server process is running with root privileges. This impacts system availability and security by potentially allowing unauthorized privilege gains. 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-2026-50260 for current remediation guidance. Until an official fix is released, consider limiting access to the X server and monitoring for unusual client behavior that may trigger this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-06-04T14:55:24.011Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-50260","vendor":"Red Hat"}]
Threat ID: 6a22b798e29bf47b506379f9
Added to database: 6/5/2026, 11:48:40 AM
Last enriched: 6/5/2026, 12:03:37 PM
Last updated: 6/5/2026, 2:07:04 PM
Views: 6
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