CVE-2026-46316
What it is
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry vgic_its_invalidate_cache() walks the per-ITS translation cache with xa_for_each() and drops the cache's reference on each entry with vgic_put_irq(). It puts the iterated pointer, though, rather than the value returned by xa_erase(). The function is called from contexts that do not exclude one another: the ITS command handlers hold its_lock, the GITS_CTLR write path holds cmd_lock, and the path that clears EnableLPIs in a redistributor's GICR_CTLR holds neither. Two or more of them can drain the same cache concurrently, and if each one observes the same entry, erases it and then puts it, the single reference the cache holds on that entry is dropped more than once. The entry can then be freed while an ITE still maps it. xa_erase() is atomic and returns the previous entry, so put only the entry that this context actually removed. The cache reference is then dropped exactly once per entry even when the invalidations run concurrently, and the behavior is unchanged when only one context runs.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 9.3 CRITICAL (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-362 · Race condition
- Record status
- Modified
Affected
- Linux Kernel < 6.12.93
- Linux Kernel < 6.18.35
- Linux Kernel < 7.0.12
- Linux Kernel 7.1
Attack profile CVSS 3.1 · 9.3
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-46316.md and follow it. Check whether this project is affected by CVE-2026-46316. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594
- https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69
- https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f
- https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc
References
- https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594
- https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69
- https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f
- https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc
- https://access.redhat.com/errata/RHSA-2026:34911
- https://access.redhat.com/errata/RHSA-2026:36018
- https://access.redhat.com/errata/RHSA-2026:38902
- https://access.redhat.com/errata/RHSA-2026:39371
- https://access.redhat.com/errata/RHSA-2026:40764
- https://access.redhat.com/errata/RHSA-2026:40779
- https://access.redhat.com/errata/RHSA-2026:40787
- https://access.redhat.com/errata/RHSA-2026:44231
- https://access.redhat.com/security/cve/CVE-2026-46316
- https://bugzilla.redhat.com/show_bug.cgi?id=2486982
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46316.json