{"api_version":"1","generated_at":"2026-08-22T02:51:22+00:00","cve":"CVE-2026-72328","urls":{"html":"https://cve.report/CVE-2026-72328","api":"https://cve.report/api/cve/CVE-2026-72328.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72328","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72328"},"summary":{"title":"accel/amdxdna: Fix potential amdxdna_umap lifetime race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix potential amdxdna_umap lifetime race\n\namdxdna_umap_release() calls the blocking mmu_interval_notifier_remove()\nbefore removing the object from abo->mem.umap_list. If\naie2_populate_range() runs concurrently, it may obtain a reference to an\namdxdna_umap that is being released, leading to a potential use-after-free.\n\nUse kref_get_unless_zero() in aie2_populate_range() when acquiring a\nreference. If the reference count has already dropped to zero, release\nis in progress and the entry is skipped.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:05","updated_at":"2026-08-17 06:18:36"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","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","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5","name":"https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb","name":"https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e","name":"https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72328","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72328","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f 267809e2c56fbea486f7250c8a4acddcc3c54dc5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f 91e8109ecffb925b6202d2737384df285b195bfb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e486147c912f653ef4b60a6c7dbd4168a4c56a9f 14f172eff9c19f8043a9858845f33cd034f3a41e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72328","cve":"CVE-2026-72328","epss":"0.001680000","percentile":"0.065830000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/accel/amdxdna/aie2_ctx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"267809e2c56fbea486f7250c8a4acddcc3c54dc5","status":"affected","version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","versionType":"git"},{"lessThan":"91e8109ecffb925b6202d2737384df285b195bfb","status":"affected","version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","versionType":"git"},{"lessThan":"14f172eff9c19f8043a9858845f33cd034f3a41e","status":"affected","version":"e486147c912f653ef4b60a6c7dbd4168a4c56a9f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/accel/amdxdna/aie2_ctx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix potential amdxdna_umap lifetime race\n\namdxdna_umap_release() calls the blocking mmu_interval_notifier_remove()\nbefore removing the object from abo->mem.umap_list. If\naie2_populate_range() runs concurrently, it may obtain a reference to an\namdxdna_umap that is being released, leading to a potential use-after-free.\n\nUse kref_get_unless_zero() in aie2_populate_range() when acquiring a\nreference. If the reference count has already dropped to zero, release\nis in progress and the entry is skipped."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Exploitation requires local DRM ioctls (AMDXDNA_EXEC_CMD) and mmap/munmap on the AMD XDNA NPU accel node (/dev/accel/accel* or renderD*); there is no network, adjacent-radio, or physical-bus path to aie2_populate_range().\nAC:L - This is a lifetime race between munmap-driven amdxdna_umap_release() and command-submit-driven aie2_populate_range(); the attacker controls both sides with concurrent threads (unmap/invalidate vs EXEC_CMD), so no timing or state outside attacker control is required.\nPR:L - Vulnerable ioctls (CREATE_BO, EXEC_CMD, mmap) are registered with DRM_IOCTL_DEF_DRV flags 0 (no DRM_ROOT_ONLY/DRM_AUTH); any unprivileged local user permitted to open the AMD NPU accel device on Ryzen AI systems can trigger the race.\nUI:N - The attacker opens the device, maps buffer objects, and races munmap/invalidation against their own EXEC_CMD submissions; no separate victim user action or interaction is required.\nS:U - The use-after-free corrupts kernel heap objects within the same kernel security authority; it is not a VM escape, hypervisor breakout, or IOMMU DMA-boundary bypass as a direct consequence of the flaw.\nC:H - Use-after-free of kmalloc amdxdna_umap lets attacker-controlled heap spray reclaim freed notifier/range metadata; subsequent hmm_range_fault() and mm_struct dereferences enable arbitrary kernel memory disclosure.\nI:H - UAF on amdxdna_umap gives attacker control over hmm_range and PFN tables used before NPU job submission, enabling heap grooming for arbitrary kernel writes and control-flow hijack toward local privilege escalation.\nA:H - The race dereferences and mutates freed amdxdna_umap and associated mm_struct/hmm_range state, reliably causing kernel oops/panic; repeated concurrent unmap/submit cycles sustain denial of service on the NPU host."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:42:50.096Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/267809e2c56fbea486f7250c8a4acddcc3c54dc5"},{"url":"https://git.kernel.org/stable/c/91e8109ecffb925b6202d2737384df285b195bfb"},{"url":"https://git.kernel.org/stable/c/14f172eff9c19f8043a9858845f33cd034f3a41e"}],"title":"accel/amdxdna: Fix potential amdxdna_umap lifetime race","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72328","datePublished":"2026-08-15T05:55:39.296Z","dateReserved":"2026-08-09T03:40:39.919Z","dateUpdated":"2026-08-17T05:42:50.096Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:05","lastModifiedDate":"2026-08-17 06:18:36","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72328","Ordinal":"1","Title":"accel/amdxdna: Fix potential amdxdna_umap lifetime race","CVE":"CVE-2026-72328","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72328","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix potential amdxdna_umap lifetime race\n\namdxdna_umap_release() calls the blocking mmu_interval_notifier_remove()\nbefore removing the object from abo->mem.umap_list. If\naie2_populate_range() runs concurrently, it may obtain a reference to an\namdxdna_umap that is being released, leading to a potential use-after-free.\n\nUse kref_get_unless_zero() in aie2_populate_range() when acquiring a\nreference. If the reference count has already dropped to zero, release\nis in progress and the entry is skipped.","Type":"Description","Title":"accel/amdxdna: Fix potential amdxdna_umap lifetime race"}]}}}