{"id":"CVE-2021-29256","aliases":["A-283489460","ASB-A-283489460","EUVD-2021-15895","GHSA-gm4q-9jx5-3gfv"],"status":"published","title":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory,...","description":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02988,"percentile":0.87425,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2021-05-24T17:56:27Z","modified":"2026-10-30T16:11:27Z","kev":{"date_added":"2023-07-07","due_date":"2023-07-28","required_action":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2023-07-07"},{"source":"kev","since":"2023-07-07"}],"fixes":[{"ecosystem":"Android","package":":unknown:","fixed_in":["SoCVersion:2023-07-05"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Android","package":":unknown:","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"SoCVersion:0"},{"fixed":"SoCVersion:2023-07-05"}]}],"versions":["SoCVersion"]}],"products":[{"vendor":"arm","product":"bifrost_gpu_kernel_driver"},{"vendor":"arm","product":"mali graphics processing unit (gpu)"},{"vendor":"arm","product":"midgard_gpu_kernel_driver"},{"vendor":"arm","product":"valhall_gpu_kernel_driver"}],"references":[{"url":"https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29256"},{"url":"https://github.com/advisories/GHSA-gm4q-9jx5-3gfv"},{"url":"https://source.android.com/security/bulletin/2023-07-01","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-29256","description":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.","status":"published","published":"2021-05-24T17:56:27Z","modified":"2025-10-21T23:25:45.386Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-15895","description":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.","status":"published","published":"2021-05-24T17:56:27Z","modified":"2025-10-21T23:25:45Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2023-07-07","updated_at":"2026-11-02T20:31:25.308373Z"}],"ghsa":[{"id":"GHSA-gm4q-9jx5-3gfv","title":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory,...","description":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.","status":"published","published":"2022-05-24T19:03:01Z","modified":"2025-10-22T00:32:14Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:04:04.786232Z"}],"kev":[{"id":"CVE-2021-29256","title":"Arm Mali GPU Kernel Driver Use-After-Free Vulnerability","description":"Arm Mali GPU Kernel Driver contains a use-after-free vulnerability that may allow a non-privileged user to gain root privilege and/or disclose information.","cwes":["CWE-416"],"kev":{"date_added":"2023-07-07","due_date":"2023-07-28","required_action":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2021-29256","description":". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.","status":"published","published":"2021-05-24T18:15:08.033Z","modified":"2026-06-17T03:47:27.647Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:06:53.987491Z"}],"osv":[{"id":"ASB-A-283489460","status":"published","published":"2023-07-01T00:00:00Z","modified":"2026-11-10T17:02:23.040266809Z","updated_at":"2026-11-10T17:35:05.865114Z"}]}}