KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
Priority MEDIUM 42CWE-362Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 24 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00337 27th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.12.93, 6.18.35, 7.0.12 +1Red Hat: 8 advisoriesRed Hat: 24 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 6.10 and later | 6.12.93, 6.18.35, 7.0.12, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 6.10 and later Fixed in 6.12.93, 6.18.35, 7.0.12, 7.1 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.10 to before 6.12.93; 6.13 to before 6.18.35; 6.19 to before 7.0.12 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | 7.1 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | 7.1 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | 7.1 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | 7.1 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | 7.1 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* | 7.1 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.10 to before 6.12.93; 6.13 to before 6.18.35; 6.19 to before 7.0.12 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* Versions 7.1 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* Versions 7.1 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.12.93, 6.18.35, 7.0.12, 7.1
Red Hat 8 advisories
- RHSA-2026:44231 Released 2026-07-29 · Red Hat rating ImportantOpenShift Container Platform 4.19.40 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202607220857-0, rhcos-ppc64le-4.19.9.6.202607220857-0, rhcos-s390x-4.19.9.6.202607220857-0 +1
- RHSA-2026:40787 Released 2026-07-21 · Red Hat rating ImportantOpenShift Container Platform 4.20.30 bug fix and security update
- Red Hat OpenShift Container Platform 4.20 rhcos-aarch64-4.20.9.6.202607151937-0, rhcos-ppc64le-4.20.9.6.202607151937-0, rhcos-s390x-4.20.9.6.202607151937-0 +1
- RHSA-2026:40779 Released 2026-07-21 · Red Hat rating ImportantOpenShift Container Platform 4.21.25 bug fix and security update
- Red Hat OpenShift Container Platform 4.21 rhcos-aarch64-4.21.9.6.202607151836-0, rhcos-ppc64le-4.21.9.6.202607151836-0, rhcos-s390x-4.21.9.6.202607151836-0 +1
Show 5 more Red Hat advisories
- RHSA-2026:40764 Released 2026-07-21 · Red Hat rating ImportantOpenShift Container Platform 4.22.6 bug fix and security update
- Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202607152026-0, rhcos-ppc64le-4.22.9.8.202607152026-0, rhcos-s390x-4.22.9.8.202607152026-0 +1
- RHSA-2026:39371 Released 2026-07-14 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.88.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.88.1.el10_0, kernel-64k-devel-6.12.0-55.88.1.el10_0 +12
- Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.88.1.el10_0, kernel-64k-6.12.0-55.88.1.el10_0, kernel-64k-core-6.12.0-55.88.1.el10_0 +28
- Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.88.1.el10_0, libperf-6.12.0-55.88.1.el10_0
- Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.88.1.el10_0, kernel-rt-64k-6.12.0-55.88.1.el10_0, kernel-rt-64k-core-6.12.0-55.88.1.el10_0 +21
- Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.88.1.el10_0, kernel-rt-core-6.12.0-55.88.1.el10_0, kernel-rt-debug-6.12.0-55.88.1.el10_0 +11
- RHSA-2026:38902 Released 2026-07-13 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.127.1.el9_6, libperf-5.14.0-570.127.1.el9_6
- Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.127.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.127.1.el9_6, kernel-64k-devel-5.14.0-570.127.1.el9_6 +12
- Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.127.1.el9_6, kernel-64k-5.14.0-570.127.1.el9_6, kernel-64k-core-5.14.0-570.127.1.el9_6 +28
- Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.127.1.el9_6, kernel-rt-64k-5.14.0-570.127.1.el9_6, kernel-rt-64k-core-5.14.0-570.127.1.el9_6 +21
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.127.1.el9_6, kernel-rt-core-5.14.0-570.127.1.el9_6, kernel-rt-debug-5.14.0-570.127.1.el9_6 +11
- RHSA-2026:36018 Released 2026-07-06 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.22.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.22.1.el9_8, kernel-64k-devel-5.14.0-687.22.1.el9_8 +12
- Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.22.1.el9_8, kernel-64k-5.14.0-687.22.1.el9_8, kernel-64k-core-5.14.0-687.22.1.el9_8 +28
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.22.1.el9_8, libperf-5.14.0-687.22.1.el9_8
- Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.22.1.el9_8, kernel-rt-64k-5.14.0-687.22.1.el9_8, kernel-rt-64k-core-5.14.0-687.22.1.el9_8 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.22.1.el9_8, kernel-rt-core-5.14.0-687.22.1.el9_8, kernel-rt-debug-5.14.0-687.22.1.el9_8 +9
- RHSA-2026:34911 Released 2026-07-02 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.30.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.30.1.el10_2, kernel-64k-devel-6.12.0-211.30.1.el10_2 +12
- Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.30.1.el10_2, kernel-64k-6.12.0-211.30.1.el10_2, kernel-64k-core-6.12.0-211.30.1.el10_2 +29
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.30.1.el10_2, libperf-6.12.0-211.30.1.el10_2
- Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.30.1.el10_2, kernel-rt-64k-6.12.0-211.30.1.el10_2, kernel-rt-64k-core-6.12.0-211.30.1.el10_2 +21
- Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.30.1.el10_2, kernel-rt-core-6.12.0-211.30.1.el10_2, kernel-rt-debug-6.12.0-211.30.1.el10_2 +9
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux for NVIDIA 26 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:38902 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:34911 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:36018 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:39371 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:38902 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:34911 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:36018 |
| Red Hat Enterprise Linux BaseOS EUS (v. 10.0) | Fixed | RHSA-2026:39371 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.6) | Fixed | RHSA-2026:38902 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:34911 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:36018 |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Fixed | RHSA-2026:39371 |
| Red Hat Enterprise Linux Real Time (v. 10) | Fixed | RHSA-2026:34911 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2026:36018 |
| Red Hat Enterprise Linux Real Time EUS (v. 10.0) | Fixed | RHSA-2026:39371 |
| Red Hat Enterprise Linux Real Time EUS (v.9.6) | Fixed | RHSA-2026:38902 |
| Red Hat Enterprise Linux Real Time for NFV (v. 10) | Fixed | RHSA-2026:34911 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2026:36018 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) | Fixed | RHSA-2026:39371 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) | Fixed | RHSA-2026:38902 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:44231 |
| Red Hat OpenShift Container Platform 4.20 | Fixed | RHSA-2026:40787 |
| Red Hat OpenShift Container Platform 4.21 | Fixed | RHSA-2026:40779 |
| Red Hat OpenShift Container Platform 4.22 | Fixed | RHSA-2026:40764 |
Not affected: 5 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-46316
- 2026-10-03 Alias added: GHSA-qcxh-2cm7-9fcc
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-16 Priority changed: LOW → MEDIUM
- 2026-10-19 Weakness changed · CISA ADP
- 2026-10-29 Affected versions changed · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
References
Patch 4
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Sources
- CVE-2026-46316 · CVE Program
- CVE-2026-46316 · NVD
- FIRST EPSS
- GHSA-qcxh-2cm7-9fcc · GitHub Advisory Database · CC BY 4.0
- CVE-2026-46316 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences