{"id":"CVE-2026-46316","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each()…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each()…","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-911"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.10, < 6.12.93","linux_kernel >= 6.13, < 6.18.35","linux_kernel >= 6.19, < 7.0.12","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.12"],"published":"2026-06-09","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:18:00.307","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46316","references":[{"url":"https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://access.redhat.com/errata/RHSA-2026:34911","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36018","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:38902","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:39371","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:40764","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:40779","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:40787","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:44231","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-46316","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2486982","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46316.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46316"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46316"},{"url":"https://lore.kernel.org/linux-cve-announce/2026060936-CVE-2026-46316-f761@gregkh/T"},{"url":"https://www.openwall.com/lists/oss-security/2026/06/10/16"}],"tags":["nvd","exploit-available","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00441,"epssPercentile":0.37658,"exploits":{"github":1,"githubRepos":["https://github.com/suominen/itscape"],"checkedAt":"2026-09-21T15:29:09.473Z"},"exploitAvailable":true,"scores":{"nvd":9.3,"vendor":7,"cna":9.3},"ingestedAt":"2026-07-03T14:03:37.083Z","slug":"CVE-2026-46316","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each() and drops the cache's reference on each entry with\nvgic_put_irq(). It puts the iterated pointer, though, rather than the\nvalue returned by xa_erase().\n\nThe function is called from contexts that do not exclude one another: the\nITS command handlers hold its_lock, the GITS_CTLR write path holds\ncmd_lock, and the path that clears EnableLPIs in a redistributor's\nGICR_CTLR holds neither. Two or more of them can drain the same cache\nconcurrently, and if each one observes the same entry, erases it and then\nputs it, the single reference the cache holds on that entry is dropped\nmore than once. The entry can then be freed while an ITE still maps it.\n\nxa_erase() is atomic and returns the previous entry, so put only the entry\nthat this context actually removed. The cache reference is then dropped\nexactly once per entry even when the invalidations run concurrently, and\nthe behavior is unchanged when only one context runs.\n\n## Affected\n\n- `linux_kernel >= 6.10, < 6.12.93`\n- `linux_kernel >= 6.13, < 6.18.35`\n- `linux_kernel >= 6.19, < 7.0.12`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.12`\n\n## Vendor advisories\n\n- **RHSA-2026:44231** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-07-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:44231)\n- **RHSA-2026:40787** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.20 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:40787)\n- **RHSA-2026:40779** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.21 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:40779)\n- **RHSA-2026:40764** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:40764)\n- **RHSA-2026:39371** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0) · released 2026-07-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:39371)\n- **RHSA-2026:34911** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-07-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:34911)\n- **RHSA-2026:38902** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6) · released 2026-07-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:38902)\n- **RHSA-2026:36018** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-07-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:36018)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 9, Red Hat Enterprise Linux for NVIDIA 26 · no fix planned: Red Hat Enterprise Linux 9, Red Hat Enterprise Linux for NVIDIA 26 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46316.json)","depth":"abyssal","depthScore":63,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":5249,"id":"CVE-2026-46316","ts":1788887256785,"field":"exploit_available","old":"false","new":"true"},{"seq":4132,"id":"CVE-2026-46316","ts":1788886373220,"field":"exploit_available","old":"true","new":"false"},{"seq":2905,"id":"CVE-2026-46316","ts":1788883039123,"field":"exploit_available","old":"false","new":"true"},{"seq":1934,"id":"CVE-2026-46316","ts":1788882442142,"field":"exploit_available","old":"true","new":"false"},{"seq":1023,"id":"CVE-2026-46316","ts":1788881876864,"field":"exploit_available","old":"false","new":"true"}]}