{"id":"CVE-2026-72331","state":"PUBLISHED","title":"accel/amdxdna: Fix VMA access race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix VMA access race\n\naie2_populate_range() and amdxdna_umap_release() access a saved VMA\npointer that may have already been freed, leading to a potential\nuse-after-free.\n\nRemove the VMA accesses from these functions to avoid the race.","publishedAt":"2026-08-15T05:55:41.196Z","updatedAt":"2026-10-15T10:08:34.107Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"3dd12422653ad4bbbebe33c49c67dba4c653c804","versionType":"git"},{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"bea20225c67fed9be3e98619c77af6ee3f43fe07","versionType":"git"},{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"1ba02717e821cf14ece642273958647e79698d3d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/aie2_ctx.c","drivers/accel/amdxdna/amdxdna_gem.c","drivers/accel/amdxdna/amdxdna_gem.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/aie2_ctx.c","drivers/accel/amdxdna/amdxdna_gem.c","drivers/accel/amdxdna/amdxdna_gem.h"]}],"references":["https://git.kernel.org/stable/c/3dd12422653ad4bbbebe33c49c67dba4c653c804","https://git.kernel.org/stable/c/bea20225c67fed9be3e98619c77af6ee3f43fe07","https://git.kernel.org/stable/c/1ba02717e821cf14ece642273958647e79698d3d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72331.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72331","state":"PUBLISHED","datePublished":"2026-08-15T05:55:41.196Z","dateUpdated":"2026-10-15T10:08:34.107Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.919Z"},"containers":{"cna":{"title":"accel/amdxdna: Fix VMA access race","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix VMA access race\n\naie2_populate_range() and amdxdna_umap_release() access a saved VMA\npointer that may have already been freed, leading to a potential\nuse-after-free.\n\nRemove the VMA accesses from these functions to avoid the race."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"3dd12422653ad4bbbebe33c49c67dba4c653c804","versionType":"git"},{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"bea20225c67fed9be3e98619c77af6ee3f43fe07","versionType":"git"},{"version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","status":"affected","lessThan":"1ba02717e821cf14ece642273958647e79698d3d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/aie2_ctx.c","drivers/accel/amdxdna/amdxdna_gem.c","drivers/accel/amdxdna/amdxdna_gem.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/aie2_ctx.c","drivers/accel/amdxdna/amdxdna_gem.c","drivers/accel/amdxdna/amdxdna_gem.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/3dd12422653ad4bbbebe33c49c67dba4c653c804"},{"url":"https://git.kernel.org/stable/c/bea20225c67fed9be3e98619c77af6ee3f43fe07"},{"url":"https://git.kernel.org/stable/c/1ba02717e821cf14ece642273958647e79698d3d"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only via local syscalls on the AMD XDNA DRM accel render node (open, DRM_IOCTL_AMDXDNA_CREATE_BO/EXEC_CMD, mmap/munmap) in drivers/accel/amdxdna; there is no network-facing handler.\nAC:L - The UAF is a mmap/munmap versus deferred amdxdna_umap_release/aie2_populate_range race; a local attacker controls both sides with concurrent threads and can reliably trigger MMU_NOTIFY_UNMAP while work still holds a stale vma pointer.\nPR:L - All vulnerable ioctls use DRM_AUTH (flag 0) and only DRM_ROOT_ONLY SET_STATE is excluded; exploitation needs local access to the render node, which unprivileged users typically have via the render group, not real root.\nUI:N - No victim interaction is required; the attacker opens the device, imports/maps buffers, and races munmap or command submission in their own process to hit the freed VMA.\nS:U - Impact is kernel heap corruption and privilege escalation within the host kernel via a local DRM client; it does not cross a VM, container, or IOMMU security boundary.\nC:H - Use-after-free of a freed vm_area_struct and vm_file in amdxdna_umap_release (and stale vma reads in aie2_populate_range) can expose adjacent kernel memory and be weaponized for arbitrary kernel read primitives.\nI:H - UAF on vma/vm_file during mapping_clear_unevictable enables corrupting kernel objects and control data, supporting heap grooming and arbitrary kernel write or code execution for local privilege escalation.\nA:H - Dereferencing a freed VMA in kernel context can cause oops/panic or wedged NPU workloads; UAF in this path is independently sufficient for complete local denial of service even if exploitation fails."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-15T10:08:34.107Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}