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CVE-2026-50264 is an out-of-bounds heap write in the DRI2 buffer-handling implementation of the X.Org X server and Xwayland. The flaw results from insufficient validation and deduplication of client-supplied DRI2 buffer attachment types. By submitting a request containing multiple DRI2BufferBackLeft attachments together with a DRI2BufferFrontLeft attachment, an X client can desynchronize front-buffer tracking and cause writes beyond the allocated buffer array. The condition may also cause the same buffer object to be released more than once. X.Org X server versions before 21.1.23 and Xwayland versions before 24.1.12 are affected.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the Huawei EulerOS_SA-2026-3320 security advisory; no technical flaw details are provided.
A vulnerability addressed by the EulerOS_SA-2026-3395 advisory; no technical flaw details are provided.
A local privilege escalation vulnerability in the X.Org X server/Xwayland DRI2 extension caused by missing validation and deduplication of duplicate buffer attachment types, leading to out-of-bounds heap writes and possible double free conditions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.