CVE-2026-72289 (GCVE-0-2026-72289)
Vulnerability from cvelistv5
Published
2026-08-15 05:55
Modified
2026-08-17 05:42
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 Version: 0919e84c0fc1fc73525fdcedefab89ea8460f697 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/arm64/kvm/vgic/vgic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3893e1fcf6f306b327a8358dcd1cbd077989a240",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "da2d249a39a1881681c303ceea33f38ba1c5bbeb",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "654be81c4c637af12709d47c7efc3302cd336513",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "e363c0bc0226dc5ea5046a88e9a6864b82c45399",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "0658b09cba7fe866c6cd70cd2dcdfdcabe80328f",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
},
{
"lessThan": "0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe",
"status": "affected",
"version": "0919e84c0fc1fc73525fdcedefab89ea8460f697",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/arm64/kvm/vgic/vgic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"lessThan": "4.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"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": "5.10.261",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.97",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "4.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "4.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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\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."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:42:24.760Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
],
"title": "KVM: arm64: vgic: Check the interrupt is still ours before migrating it",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"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"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…