CVE-2026-72288KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling Hyunwoo Kim reports some really bad races should the following situation occur: - LPI-I is pending in vcpu-B's AP list - vcpu-A writes to vcpu-B's RD to disable its LPIs - vcpu-C moves I from B to C If the last two race nicely enough, vgic_prune_ap_list() can drop the irq and AP list locks, reacquire them, and in the interval the irq has been freed. UAF follows. The fix is two-fold: - Before dropping the irq and ap_list locks, take a reference on the irq - Do not try to handle migration of the pending bit: there is no expectation that this state is retained, as per the architecture With that, we're sure that the interrupt is still around, and we safely remove it from the AP list as it has no target at this stage (unless another interrupt fires, but that's another story).
- CVSS
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5dd4b924e390af426e424d5e52c1b4d1566af817 before d19dca8194ebed371e624331c6be2cb73b562caf; from 5dd4b924e390af426e424d5e52c1b4d1566af817 before b1a89d12d35a8256d2b170ced0b1c86851f3def2; from 5dd4b924e390af426e424d5e52c1b4d1566af817 before 7258770e5814f15e8308ebda82ac9acf6964ba8e | CNA record |
References
- https://git.kernel.org/stable/c/d19dca8194ebed371e624331c6be2cb73b562caf
- https://git.kernel.org/stable/c/b1a89d12d35a8256d2b170ced0b1c86851f3def2
- https://git.kernel.org/stable/c/7258770e5814f15e8308ebda82ac9acf6964ba8e
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.