CVE-2026-50264: Out-of-bounds Write in Red Hat Red Hat Enterprise Linux 10
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for privilege escalation if the X server runs as root.
AI Analysis
Technical Summary
An out-of-bounds write vulnerability exists in the X.Org X server and Xwayland within the DRIGetBuffers/DRIGetBuffersWithFormat functions. Specifically, a client that requests multiple DRI2BufferBackLeft attachments along with a DRI2BufferFrontLeft can trigger a heap write beyond allocated bounds. This can lead to a server crash or privilege escalation if the X server process runs as root. The vulnerability affects Red Hat Enterprise Linux 10. The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H with a score of 7.8. The vendor advisory does not explicitly confirm patch availability or remediation status.
Potential Impact
Successful exploitation can cause denial of service by crashing the X server or enable privilege escalation if the X server runs with root privileges, potentially compromising system confidentiality, integrity, and availability. No known active exploits have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-50264 for current remediation guidance. Until an official fix is available, consider limiting access to the X server or running it with reduced privileges if possible to mitigate risk.
CVE-2026-50264: Out-of-bounds Write in Red Hat Red Hat Enterprise Linux 10
Description
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be used to crash the server, or for privilege escalation if the X server runs as root.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An out-of-bounds write vulnerability exists in the X.Org X server and Xwayland within the DRIGetBuffers/DRIGetBuffersWithFormat functions. Specifically, a client that requests multiple DRI2BufferBackLeft attachments along with a DRI2BufferFrontLeft can trigger a heap write beyond allocated bounds. This can lead to a server crash or privilege escalation if the X server process runs as root. The vulnerability affects Red Hat Enterprise Linux 10. The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H with a score of 7.8. The vendor advisory does not explicitly confirm patch availability or remediation status.
Potential Impact
Successful exploitation can cause denial of service by crashing the X server or enable privilege escalation if the X server runs with root privileges, potentially compromising system confidentiality, integrity, and availability. No known active exploits have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-50264 for current remediation guidance. Until an official fix is available, consider limiting access to the X server or running it with reduced privileges if possible to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-06-04T14:55:24.012Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-50264","vendor":"Red Hat"}]
Threat ID: 6a22b79be29bf47b50637ec7
Added to database: 6/5/2026, 11:48:43 AM
Last enriched: 6/5/2026, 12:03:27 PM
Last updated: 6/5/2026, 2:07:03 PM
Views: 9
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