{"id":"CVE-2026-72289","state":"PUBLISHED","title":"KVM: arm64: vgic: Check the interrupt is still ours before migrating it","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic: Check the interrupt is still ours before migrating it\n\nvgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating\nan interrupt to another vCPU. After reacquiring the locks it only checks\nthat the affinity is unchanged (target_vcpu == vgic_target_oracle(irq))\nbefore moving the interrupt, which assumes that an interrupt whose affinity\nis preserved is still queued on this vCPU's ap_list.\n\nThat assumption no longer holds if the interrupt is taken off the ap_list\nwhile the locks are dropped. vgic_flush_pending_lpis() removes the\ninterrupt from the list and sets irq->vcpu to NULL, but leaves\nenabled/pending/target_vcpu untouched. As the interrupt is still enabled\nand pending, vgic_target_oracle() returns the same target_vcpu, so the\naffinity check passes and list_del() is run a second time on an entry that\nhas already been removed.\n\nAlso check that the interrupt is still assigned to this vCPU\n(irq->vcpu == vcpu) before moving it.","publishedAt":"2026-08-15T05:55:10.870Z","updatedAt":"2026-10-16T18:55:15.201Z","severity":{"score":9.3,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"3893e1fcf6f306b327a8358dcd1cbd077989a240","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"da2d249a39a1881681c303ceea33f38ba1c5bbeb","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"654be81c4c637af12709d47c7efc3302cd336513","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"e363c0bc0226dc5ea5046a88e9a6864b82c45399","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"0658b09cba7fe866c6cd70cd2dcdfdcabe80328f","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/vgic/vgic.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.7","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","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":["arch/arm64/kvm/vgic/vgic.c"]}],"references":["https://git.kernel.org/stable/c/3893e1fcf6f306b327a8358dcd1cbd077989a240","https://git.kernel.org/stable/c/cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc","https://git.kernel.org/stable/c/da2d249a39a1881681c303ceea33f38ba1c5bbeb","https://git.kernel.org/stable/c/654be81c4c637af12709d47c7efc3302cd336513","https://git.kernel.org/stable/c/e363c0bc0226dc5ea5046a88e9a6864b82c45399","https://git.kernel.org/stable/c/79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe","https://git.kernel.org/stable/c/0658b09cba7fe866c6cd70cd2dcdfdcabe80328f","https://git.kernel.org/stable/c/0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72289.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72289","state":"PUBLISHED","datePublished":"2026-08-15T05:55:10.870Z","dateUpdated":"2026-10-16T18:55:15.201Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.917Z"},"containers":{"cna":{"title":"KVM: arm64: vgic: Check the interrupt is still ours before migrating it","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic: Check the interrupt is still ours before migrating it\n\nvgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating\nan interrupt to another vCPU. After reacquiring the locks it only checks\nthat the affinity is unchanged (target_vcpu == vgic_target_oracle(irq))\nbefore moving the interrupt, which assumes that an interrupt whose affinity\nis preserved is still queued on this vCPU's ap_list.\n\nThat assumption no longer holds if the interrupt is taken off the ap_list\nwhile the locks are dropped. vgic_flush_pending_lpis() removes the\ninterrupt from the list and sets irq->vcpu to NULL, but leaves\nenabled/pending/target_vcpu untouched. As the interrupt is still enabled\nand pending, vgic_target_oracle() returns the same target_vcpu, so the\naffinity check passes and list_del() is run a second time on an entry that\nhas already been removed.\n\nAlso check that the interrupt is still assigned to this vCPU\n(irq->vcpu == vcpu) before moving it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"3893e1fcf6f306b327a8358dcd1cbd077989a240","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"da2d249a39a1881681c303ceea33f38ba1c5bbeb","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"654be81c4c637af12709d47c7efc3302cd336513","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"e363c0bc0226dc5ea5046a88e9a6864b82c45399","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"0658b09cba7fe866c6cd70cd2dcdfdcabe80328f","versionType":"git"},{"version":"0919e84c0fc1fc73525fdcedefab89ea8460f697","status":"affected","lessThan":"0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/vgic/vgic.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.7","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","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":["arch/arm64/kvm/vgic/vgic.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3893e1fcf6f306b327a8358dcd1cbd077989a240"},{"url":"https://git.kernel.org/stable/c/cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc"},{"url":"https://git.kernel.org/stable/c/da2d249a39a1881681c303ceea33f38ba1c5bbeb"},{"url":"https://git.kernel.org/stable/c/654be81c4c637af12709d47c7efc3302cd336513"},{"url":"https://git.kernel.org/stable/c/e363c0bc0226dc5ea5046a88e9a6864b82c45399"},{"url":"https://git.kernel.org/stable/c/79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe"},{"url":"https://git.kernel.org/stable/c/0658b09cba7fe866c6cd70cd2dcdfdcabe80328f"},{"url":"https://git.kernel.org/stable/c/0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only from KVM guest execution paths—GICv3 redistributor GICR_CTLR LPI-disable MMIO traps into vgic_flush_pending_lpis() and vCPU exit/sync paths into vgic_prune_ap_list()—not from any remote network, adjacent-radio, or physical-device interface on the host.\nAC:L - A malicious multi-vCPU guest controls both racing sides by pinning threads, changing LPI affinity via ITS so an interrupt must migrate off one vCPU's ap_list, and concurrently disabling LPIS on that redistributor; the attacker creates the window rather than depending on uncontrollable host timing or memory layout.\nPR:N - The highest-impact scenario is a malicious cloud VM tenant on arm64 KVM who needs no host privileges beyond code already running inside the assigned guest; exploitation uses guest-kernel GIC MMIO/ITS operations, not host root, CAP_SYS_ADMIN in the init namespace, or additional /dev/kvm access beyond having a VM.\nUI:N - Exploitation is fully attacker-driven from within the guest VM through deliberate LPI setup, affinity changes, and timed GICR_CTLR writes; no victim user or administrator action on the host is required beyond normal VM operation.\nS:C - Double list_del()/list_add_tail() on host-kernel ap_list linkages corrupts KVM VGIC state from guest-controlled interrupt operations, crossing the guest-to-host virtualization security boundary with VM-escape-class impact rather than confining damage to the attacker's VM.\nC:H - Corrupting detached ap_list pointers and inserting them into another vCPU's ap_list_head enables out-of-bounds kernel linked-list traversal and disclosure of adjacent kmalloc slab memory (struct vgic_irq and neighboring objects); per kernel guidance, this list corruption is leverageable for arbitrary host memory read primitives.\nI:H - The vulnerable path performs list_del() on an already removed entry and may follow with list_add_tail() onto another vCPU's ap_list, letting a guest steer kernel list pointers and overwrite adjacent vgic_irq/host heap metadata for control-flow or data corruption on the hypervisor.\nA:H - Re-running list_del() on an entry already removed by vgic_flush_pending_lpis() dereferences poisoned list pointers and corrupts live ap_list_heads, causing immediate host kernel BUG/oops/panic or persistent interrupt-delivery failure during subsequent VGIC processing."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:42:24.760Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-72289","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:45:52.646883Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:15.201Z"}}]}}}