{"id":"CVE-2026-72091","summary":"accel/amdxdna: reject user command submission without a command BO","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: reject user command submission without a command BO\n\namdxdna_drm_submit_execbuf() passes the user-supplied command BO handle\nstraight into amdxdna_cmd_submit() with drv_cmd == NULL. When the handle\nis AMDXDNA_INVALID_BO_HANDLE (0), the block that fetches job-\u003ecmd_bo is\nskipped, leaving it NULL, and no check rejects it on the user path (the\n!job-\u003ecmd_bo guard lives inside the != INVALID branch).\n\nThe job is then armed and pushed to the DRM scheduler.\naie2_sched_job_run() takes the drv_cmd == NULL path and calls\namdxdna_cmd_set_state(job-\u003ecmd_bo) -\u003e amdxdna_gem_vmap(NULL) -\u003e\nto_gobj(NULL)-\u003edev, a NULL pointer dereference in the drm_sched worker.\nA process with access to the accel node on a system with a probed AMD NPU\ncan trigger a kernel oops with a single AMDXDNA_EXEC_CMD ioctl\n(cmd_handles = 0).\n\nOnly internal driver commands (SYNC_DEBUG_BO / ATTACH_DEBUG_BO)\nlegitimately pass AMDXDNA_INVALID_BO_HANDLE, and they always set drv_cmd.\nReject the invalid handle for user submissions (drv_cmd == NULL) at the\nsubmit choke point so every user path is covered.\n\nFound by 0sec automated security-research tooling (https://0sec.ai).","modified":"2026-08-18T03:31:04.142150676Z","published":"2026-08-15T05:52:38.366Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72091.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/261c1fe3327ad24508f54552c6366e3e4db82c15"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fff6509d976f6fae423a5236391ccdbd7e0e9f06"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72091.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72091"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"aac243092b707bb3018e951d470cc1a9bcbaba6c"},{"fixed":"fff6509d976f6fae423a5236391ccdbd7e0e9f06"},{"fixed":"261c1fe3327ad24508f54552c6366e3e4db82c15"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72091.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.14.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72091.json"}}],"schema_version":"1.9.0"}