{"id":"CVE-2026-11891","state":"PUBLISHED","title":"Mali GPU Userspace Driver allows access to already freed memory","description":"Use After Free vulnerability in Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access already freed memory.\n\n\n\nThis issue affects Valhall GPU Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0.","publishedAt":"2026-09-08T14:21:40.739Z","updatedAt":"2026-09-10T18:28:12.237Z","severity":{"score":5.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"Arm","products":["Arm Ltd Valhall GPU Userspace Driver","Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver"],"affected":[{"vendor":"Arm Ltd","product":"Valhall GPU Userspace Driver","defaultStatus":"unaffected","versions":[{"version":"r46p0","status":"affected","lessThanOrEqual":"r49p5","versionType":"patch"},{"version":"r50p0","status":"affected","lessThanOrEqual":"r54p3","versionType":"patch"},{"version":"r55p0","status":"affected","versionType":"patch"},{"version":"r56p0","status":"unaffected","versionType":"patch"}]},{"vendor":"Arm Ltd","product":"Arm 5th Gen GPU Architecture Userspace Driver","defaultStatus":"unaffected","versions":[{"version":"r46p0","status":"affected","lessThanOrEqual":"r49p5","versionType":"patch"},{"version":"r50p0","status":"affected","lessThanOrEqual":"r54p3","versionType":"patch"},{"version":"r55p0","status":"affected","versionType":"patch"},{"version":"r56p0","status":"unaffected","versionType":"patch"}]}],"references":["https://support.arm.com/documentation/111552/1-0/?lang=en"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/11xxx/CVE-2026-11891.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-11891","state":"PUBLISHED","datePublished":"2026-09-08T14:21:40.739Z","dateUpdated":"2026-09-10T18:28:12.237Z","assignerShortName":"Arm","assignerOrgId":"56a131ea-b967-4a0d-a41e-5f3549952846","dateReserved":"2026-06-10T15:09:29.899Z"},"containers":{"cna":{"title":"Mali GPU Userspace Driver allows access to already freed memory","descriptions":[{"lang":"en","value":"Use After Free vulnerability in Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access already freed memory.\n\n\n\nThis issue affects Valhall GPU Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r46p0 through r49p5, from r50p0 through r54p3, r55p0."}],"affected":[{"vendor":"Arm Ltd","product":"Valhall GPU Userspace Driver","defaultStatus":"unaffected","versions":[{"version":"r46p0","status":"affected","lessThanOrEqual":"r49p5","versionType":"patch"},{"version":"r50p0","status":"affected","lessThanOrEqual":"r54p3","versionType":"patch"},{"version":"r55p0","status":"affected","versionType":"patch"},{"version":"r56p0","status":"unaffected","versionType":"patch"}]},{"vendor":"Arm Ltd","product":"Arm 5th Gen GPU Architecture Userspace Driver","defaultStatus":"unaffected","versions":[{"version":"r46p0","status":"affected","lessThanOrEqual":"r49p5","versionType":"patch"},{"version":"r50p0","status":"affected","lessThanOrEqual":"r54p3","versionType":"patch"},{"version":"r55p0","status":"affected","versionType":"patch"},{"version":"r56p0","status":"unaffected","versionType":"patch"}]}],"references":[{"url":"https://support.arm.com/documentation/111552/1-0/?lang=en"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416 Use After Free","type":"CWE"}]}],"providerMetadata":{"shortName":"Arm","orgId":"56a131ea-b967-4a0d-a41e-5f3549952846","dateUpdated":"2026-09-08T14:21:40.739Z"},"solutions":[{"lang":"en","value":"This issue has been fixed in the following versions: Valhall GPU Userspace Driver: r56p0; Arm 5th Gen GPU Architecture Userspace Driver: r56p0. Arm partners are recommended to upgrade to the latest applicable version as soon as possible.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>This issue has been fixed in the following versions: Valhall GPU Userspace Driver: r56p0; Arm 5th Gen GPU Architecture Userspace Driver: r56p0. Arm partners are recommended to upgrade to the latest applicable version as soon as possible.</p>"}]}],"credits":[{"lang":"en","value":"Anymous","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.1,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-10T18:28:09.653159Z","id":"CVE-2026-11891","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-10T18:28:12.237Z"}}]}}}