{"id":"CVE-2026-92509","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is r…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is r…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < 5eb0c57a8b568eb08f464861d84d518a2af939ac","Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < d5cc211e8c39e46f357d30a092d683e84d560de9","Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < 2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b","Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < 8c013e3a8d8273da4d47bf1c27f016a3551996f5","Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < 64c72390d8407ea86de712a477c796b07d37abc4","Linux >= 99fa331dc8629be55ac7a0cca0dc56492070ddac < 235ef2d0e750885c29340b0fc40620a7a4f52e12","Linux 5.3"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:53.590","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92509","references":[{"url":"https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92509.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92509"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536482"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92509"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92509"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92509.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-92509"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.779Z","epss":0.00173,"epssPercentile":0.0665,"cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-825","CWE-416"],"slug":"CVE-2026-92509","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\ncounter_release(), which is too late, since by that point\nvendor-specific resources associated with the counter might already be\nfreed. This can leave a short window where the counter remains\naccessible through restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_del() call to be before the\nfreeing of the vendor-specific resources, ensuring that the counter is\nremoved from restrack before its internal resources are released.\nThis guarantees that no new users hold references to a counter that is\nin the process of destruction.\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 · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92509.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225531,"id":"CVE-2026-92509","ts":1792498285986,"field":"cvss","old":null,"new":"7"},{"seq":225530,"id":"CVE-2026-92509","ts":1792498285986,"field":"severity","old":"none","new":"high"}]}