{"id":"CVE-2026-92511","revision":"38a390398b2646ea878c30a8779a1157","records":[{"revision":"38a390398b2646ea878c30a8779a1157","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-92511","aliases":[],"title":"RDMA/core: Fix potential use after free in ib_destroy_cq_user()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_destroy_cq_user()\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_destroy_cq_user(), 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_begin_del() call to the start of\nib_destroy_cq_user(), ensuring that the CQ is removed from restrack\nbefore its internal resources are released. This guarantees that no new\nusers hold references to a CQ that is in the process of destruction.\n\nIn addition, this change preserves the intended inverted order\nbetween create and destroy routines: resources are added to\nrestrack at the end of successful creation, and hence shall be removed\nfrom the restrack first thing during the destruction flow, which keeps\nthe lifecycle management consistent and predictable.","state":0,"publishedAt":"2026-09-17T16:10:21.449+00:00","modifiedAt":"2026-10-19T09:04:17.289+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/verbs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"42f7a0c7a94003059540cce448acabfa62ad119d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"253c2ed71a532c70fa0e64317ceb02bb1a50c84c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"b85a148731eceffacb6a030950187d785175607f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"197c262dbf94c0f7ab7ac54b66f892ce9f343232\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"8a72a6aad84b3928dbb5e564bff1f56a7ec222ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"08f294a1524bc3211a28091daa6c7513828c7d33\",\n                            \"lessThan\": \"3481bec4dfc4aee24ffea5a547ee95b70b67d9d5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/verbs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.16\",\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/42f7a0c7a94003059540cce448acabfa62ad119d","https://git.kernel.org/stable/c/253c2ed71a532c70fa0e64317ceb02bb1a50c84c","https://git.kernel.org/stable/c/b85a148731eceffacb6a030950187d785175607f","https://git.kernel.org/stable/c/197c262dbf94c0f7ab7ac54b66f892ce9f343232","https://git.kernel.org/stable/c/8a72a6aad84b3928dbb5e564bff1f56a7ec222ae","https://git.kernel.org/stable/c/3481bec4dfc4aee24ffea5a547ee95b70b67d9d5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92511","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-92511","identifiers":["CVE-2026-92511"]},"retained":false,"historicalAffected":[]}],"coverage":[]}