{"id":"CVE-2026-92508","summary":"RDMA/core: Fix potential use after free in ib_free_cq()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_free_cq()\n\nWhen accessing a CQ via the netlink path the only synchronization\nmechanism for the said CQ is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\nib_free_cq(), which is too late, since by that point\nvendor-specific resources associated with the CQ might already be\nfreed. This can leave a short window where the CQ remains accessible\nthrough restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_del() call to be before the freeing\nof the vendor-specific resources ensuring that the CQ is removed from\nrestrack before its internal resources are released.\nThis guarantees that no new users hold references to a CQ that is in\nthe process of destruction.","modified":"2026-11-13T04:07:13.633680418Z","published":"2026-09-17T16:10:19.443Z","related":["SUSE-SU-2026:24181-1","SUSE-SU-2026:24182-1","SUSE-SU-2026:24315-1","SUSE-SU-2026:24316-1","SUSE-SU-2026:24643-1","SUSE-SU-2026:24648-1","SUSE-SU-2026:24651-1","SUSE-SU-2026:24662-1","SUSE-SU-2026:4640-1","SUSE-SU-2026:4706-1","openSUSE-SU-2026:11893-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92508.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92508.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92508"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"43d781b9fa562f0c6e50f62c870fbfeb9dc85213"},{"fixed":"a804b162f9bc2b38b2ed1b4752eea9faadb1645b"},{"fixed":"91f8a17a22ab615a03743120e19935e731f28fb9"},{"fixed":"76f2cb4f721815c3b6262a6dc2151de88646924c"},{"fixed":"b8dcca427096fc9c50f1b376847fea72bc842d31"},{"fixed":"9abea37942534eeb049335476178696b654b000c"},{"fixed":"43403fe45379c64fa6276e5a8ede44493e5d2d3d"},{"fixed":"29dc2f8e1c97372c2871a70088707933515fbd5b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7ac277a01f9017fcde4f3f81670c995992945433"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"093f87dda065e0f618dd577985eccbe85efb9b54"}]}],"versions":["v5.8.18","v5.8.17","v5.9.16","v5.9.15","v5.9.14","v5.9.13","v5.9.12","v5.9.11","v5.9.10","v5.9.9","v5.9.8","v5.9.7","v5.9.6","v5.9.5","v5.9.4","v5.9.3","v5.9.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-92508.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.17"},{"fixed":"5.9"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.9.2"},{"fixed":"5.10"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.10.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-92508.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}