{"schemaVersion":3,"id":"CVE-2022-46891","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in the Arm Mali GPU Kernel Driver. There is a use-after-free. A non-privileged user can make improper GPU processing operations to gain access to already freed memory. This affects Midgard r13p0 through r32p0, Bifrost r1p0 through r40p0, and Valhall r19p0 through r40p0.","dates":{"published":"2023-01-17T00:00:00.000Z","modified":"2024-11-27T15:10:12.945Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/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":"NVD","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00806,"percentile":0.56082,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00806},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00806,"percentile":0.56082}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00806,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","sc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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","product":"bifrost_gpu_kernel_driver","name":"bifrost gpu kernel driver","label":"bifrost_gpu_kernel_driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r1p0, ≤ r40p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r1p0, ≤ r40p0","eol":null,"hubHref":"/vendor/arm/bifrost_gpu_kernel_driver"},{"vendor":"arm","product":"midgard_gpu_kernel_driver","name":"midgard gpu kernel driver","label":"midgard_gpu_kernel_driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r13p0, ≤ r32p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r13p0, ≤ r32p0","eol":null,"hubHref":"/vendor/arm/midgard_gpu_kernel_driver"},{"vendor":"arm","product":"valhall_gpu_kernel_driver","name":"valhall gpu kernel driver","label":"valhall_gpu_kernel_driver","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ r19p0, ≤ r40p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r19p0, ≤ r40p0","eol":null,"hubHref":"/vendor/arm/valhall_gpu_kernel_driver"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities","label":"developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities","hostname":"developer.arm.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-01-17T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-27T15:10:12.945Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T22:00:30.513Z","stale":false,"partial":false}}