GHSA-qcxh-2cm7-9fcc · Severity: critical — In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Drop...
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.
Conclusion & alert: CVE-2026-46316 is rated Moderate Risk (40.9/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.20%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-23 | 0.13% | 0.20% | +0.07% |
| 2 | 2026-06-15 | 0.02% | 0.13% | +0.11% |
| 3 | 2026-06-10 | — | 0.02% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 3.1 | CRITICAL |
|
2.5 | 6.0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
GHSA-qcxh-2cm7-9fcc · Severity: critical — In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Drop...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-46316 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-46316 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-46316 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-46316/ |
ubuntu
|
medium | CVE-2026-46316 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 891 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 508, needs-triage 224, ignored 159. | https://ubuntu.com/security/CVE-2026-46316 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linux | linux_kernel | >= 6.10, < 6.12.93 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.10, < 6.18.35 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.10, < 7.0.12 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.10, < 7.1 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |