CVE-2026-72289 (GCVE-0-2026-72289)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42
VLAI
Title
KVM: arm64: vgic: Check the interrupt is still ours before migrating it
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Check the interrupt is still ours before migrating it vgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating an interrupt to another vCPU. After reacquiring the locks it only checks that the affinity is unchanged (target_vcpu == vgic_target_oracle(irq)) before moving the interrupt, which assumes that an interrupt whose affinity is preserved is still queued on this vCPU's ap_list. That assumption no longer holds if the interrupt is taken off the ap_list while the locks are dropped. vgic_flush_pending_lpis() removes the interrupt from the list and sets irq->vcpu to NULL, but leaves enabled/pending/target_vcpu untouched. As the interrupt is still enabled and pending, vgic_target_oracle() returns the same target_vcpu, so the affinity check passes and list_del() is run a second time on an entry that has already been removed. Also check that the interrupt is still assigned to this vCPU (irq->vcpu == vcpu) before moving it.
Severity
9.3 (Critical)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < 3893e1fcf6f306b327a8358dcd1cbd077989a240 (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < da2d249a39a1881681c303ceea33f38ba1c5bbeb (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < 654be81c4c637af12709d47c7efc3302cd336513 (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < e363c0bc0226dc5ea5046a88e9a6864b82c45399 (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < 79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < 0658b09cba7fe866c6cd70cd2dcdfdcabe80328f (git)
Affected: 0919e84c0fc1fc73525fdcedefab89ea8460f697 , < 0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe (git)
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Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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        {
          "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\u0027s 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-\u003evcpu 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-\u003evcpu == vcpu) before moving it."
        }
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            "version": "3.1"
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              "lang": "en",
              "value": "AV:L - The bug is reached only from KVM guest execution paths\u2014GICv3 redistributor GICR_CTLR LPI-disable MMIO traps into vgic_flush_pending_lpis() and vCPU exit/sync paths into vgic_prune_ap_list()\u2014not 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\u0027s 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\u0027s VM.\nC:H - Corrupting detached ap_list pointers and inserting them into another vCPU\u0027s 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\u0027s 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."
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        "shortName": "Linux"
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    "cveId": "CVE-2026-72289",
    "datePublished": "2026-08-15T05:55:10.870Z",
    "dateReserved": "2026-08-09T03:40:39.917Z",
    "dateUpdated": "2026-08-17T05:42:24.760Z",
    "state": "PUBLISHED"
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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\u0027s 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-\u003evcpu 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-\u003evcpu == vcpu) before moving it.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/arm64/kvm/vgic/vgic.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"3893e1fcf6f306b327a8358dcd1cbd077989a240\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"da2d249a39a1881681c303ceea33f38ba1c5bbeb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"654be81c4c637af12709d47c7efc3302cd336513\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"e363c0bc0226dc5ea5046a88e9a6864b82c45399\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"0658b09cba7fe866c6cd70cd2dcdfdcabe80328f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0919e84c0fc1fc73525fdcedefab89ea8460f697\",\"lessThan\":\"0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/arm64/kvm/vgic/vgic.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":6.0}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0658b09cba7fe866c6cd70cd2dcdfdcabe80328f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3893e1fcf6f306b327a8358dcd1cbd077989a240\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/654be81c4c637af12709d47c7efc3302cd336513\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/da2d249a39a1881681c303ceea33f38ba1c5bbeb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e363c0bc0226dc5ea5046a88e9a6864b82c45399\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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