{"id":"CVE-2026-92508","revision":"2ee5658d280242638fb65b19aadaf96c","records":[{"revision":"2ee5658d280242638fb65b19aadaf96c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-92508","aliases":[],"title":"RDMA/core: Fix potential use after free in ib_free_cq()","description":"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.","state":0,"publishedAt":"2026-09-17T16:10:19.443+00:00","modifiedAt":"2026-10-19T09:04:14.344+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/core/cq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"a804b162f9bc2b38b2ed1b4752eea9faadb1645b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"91f8a17a22ab615a03743120e19935e731f28fb9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"76f2cb4f721815c3b6262a6dc2151de88646924c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"b8dcca427096fc9c50f1b376847fea72bc842d31\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"9abea37942534eeb049335476178696b654b000c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"43403fe45379c64fa6276e5a8ede44493e5d2d3d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"43d781b9fa562f0c6e50f62c870fbfeb9dc85213\",\n                            \"lessThan\": \"29dc2f8e1c97372c2871a70088707933515fbd5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ac277a01f9017fcde4f3f81670c995992945433\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"093f87dda065e0f618dd577985eccbe85efb9b54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.8.17\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.9.2\",\n                            \"lessThan\": \"5.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/core/cq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645b","https://git.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9","https://git.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924c","https://git.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31","https://git.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000c","https://git.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3d","https://git.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92508","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-92508","identifiers":["CVE-2026-92508"]},"retained":false,"historicalAffected":[]}],"coverage":[]}