{"schemaVersion":3,"id":"CVE-2026-9034","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Use After Free vulnerability in Arm Ltd Bifrost GPU Userspace Driver, 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 Bifrost GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r51p0, from r54p1 through r54p3; Valhall GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0.","dates":{"published":"2026-09-08T14:20:53.547Z","modified":"2026-09-10T18:03:49.974Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00162,"percentile":0.05014,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.051999999999999984,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.0011},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00162,"percentile":0.05014}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0011,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00162,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00162,"percentile":0.05014}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-416","name":"Use After Free","description":"The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"arm ltd","product":"arm 5th gen gpu architecture userspace driver","name":"Arm 5th Gen GPU Architecture Userspace Driver","label":"arm 5th gen gpu architecture userspace driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r42p0, ≤ r49p5","noFixRecorded":false,"fixedIn":null},{"text":"≥ r50p0, ≤ r54p3","noFixRecorded":false,"fixedIn":null},{"text":"r55p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r42p0, ≤ r49p5 | ≥ r50p0, ≤ r54p3 | r55p0","eol":null,"hubHref":"/vendor/arm_ltd/arm_5th_gen_gpu_architecture_userspace_driver"},{"vendor":"arm ltd","product":"bifrost gpu userspace driver","name":"Bifrost GPU Userspace Driver","label":"bifrost gpu userspace driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r42p0, ≤ r49p5","noFixRecorded":false,"fixedIn":null},{"text":"≥ r50p0, ≤ r51p0","noFixRecorded":false,"fixedIn":null},{"text":"≥ r54p1, ≤ r54p3","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r42p0, ≤ r49p5 | ≥ r50p0, ≤ r51p0 | ≥ r54p1, ≤ r54p3","eol":null,"hubHref":"/vendor/arm_ltd/bifrost_gpu_userspace_driver"},{"vendor":"arm ltd","product":"valhall gpu userspace driver","name":"Valhall GPU Userspace Driver","label":"valhall gpu userspace driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r42p0, ≤ r49p5","noFixRecorded":false,"fixedIn":null},{"text":"≥ r50p0, ≤ r54p3","noFixRecorded":false,"fixedIn":null},{"text":"r55p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r42p0, ≤ r49p5 | ≥ r50p0, ≤ r54p3 | r55p0","eol":null,"hubHref":"/vendor/arm_ltd/valhall_gpu_userspace_driver"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://support.arm.com/documentation/111552/1-0/?lang=en","label":"support.arm.com/documentation/111552/1-0/?lang=en","hostname":"support.arm.com","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-08T14:20:53.547Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-10T18:03:49.974Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T18:22:01.327Z","stale":false,"partial":false}}