{"id":"CVE-2026-89764","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust: devres: fix race between concurrent revokers\n\nThere is a potential race condition when two paths try to revoke a\nDevres concurrently.\n\nThe driver core's devres_re…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust: devres: fix race between concurrent revokers\n\nThere is a potential race condition when two paths try to revoke a\nDevres concurrently.\n\nThe driver core's devres_re…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-825"],"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-10-11","sourceUpdated":"2026-10-11T14:17:07.867","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89764","references":[{"url":"https://git.kernel.org/stable/c/acc516dfa1972d31836b50abc0115216cd0fccc5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c7e3d57c705ab1053a6a1bbef96795e792da1540","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7930d857cc7930fc39b487ea9f3a453eca3713e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89764.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89764"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532452"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89764"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89764"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89764.mbox"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00168,"epssPercentile":0.06144,"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.472Z","slug":"CVE-2026-89764","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrust: devres: fix race between concurrent revokers\n\nThere is a potential race condition when two paths try to revoke a\nDevres concurrently.\n\nThe driver core's devres_release_all() calls Revocable::revoke() via the\nrelease callback, while Devres::drop() calls revoke_nosync() on another\nCPU.\n\nThe revoker that does not claim the is_available swap returns\nimmediately, but the revoker that did may still be executing\ndrop_in_place() on the inner data. This can cause a use-after-free when\nthe other revoker's caller proceeds to drop adjacent resources that\ndrop_in_place() still references (e.g., Devres<DmaMappedSgt> racing with\nSGTable freeing the backing sg_table and pages).\n\nFix this by adding a Completion. The release callback signals the\nCompletion after revoke() finishes, and Devres::drop() waits for it when\nit loses the is_available swap. This ensures the wrapped object is fully\ntorn down before Devres::drop() returns.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89764.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219423,"id":"CVE-2026-89764","ts":1791816805257,"field":"cvss","old":"5.5","new":"7.8"},{"seq":219422,"id":"CVE-2026-89764","ts":1791816805257,"field":"severity","old":"medium","new":"high"},{"seq":208934,"id":"CVE-2026-89764","ts":1790062293932,"field":"cvss","old":"5.3","new":"5.5"},{"seq":202964,"id":"CVE-2026-89764","ts":1789403733138,"field":"cvss","old":"7.8","new":"5.3"},{"seq":202963,"id":"CVE-2026-89764","ts":1789403733138,"field":"severity","old":"high","new":"medium"},{"seq":197658,"id":"CVE-2026-89764","ts":1789384318282,"field":"cvss","old":"5.3","new":"7.8"},{"seq":197657,"id":"CVE-2026-89764","ts":1789384318282,"field":"severity","old":"medium","new":"high"},{"seq":183643,"id":"CVE-2026-89764","ts":1789356676231,"field":"cvss","old":"7.8","new":"5.3"},{"seq":183642,"id":"CVE-2026-89764","ts":1789356676231,"field":"severity","old":"high","new":"medium"},{"seq":153654,"id":"CVE-2026-89764","ts":1789285351782,"field":"cvss","old":null,"new":"7.8"},{"seq":153653,"id":"CVE-2026-89764","ts":1789285351782,"field":"severity","old":"none","new":"high"},{"seq":147173,"id":"CVE-2026-89764","ts":1789270198858,"field":"cvss","old":null,"new":"5.3"},{"seq":147172,"id":"CVE-2026-89764","ts":1789270198858,"field":"severity","old":"none","new":"medium"},{"seq":108926,"id":"CVE-2026-89764","ts":1789183729576,"field":"cvss","old":null,"new":"5.3"},{"seq":108925,"id":"CVE-2026-89764","ts":1789183729576,"field":"severity","old":"none","new":"medium"}]}