{"id":"CVE-2026-92510","summary":"RDMA/core: Fix potential use after free in ib_destroy_srq_user()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in ib_destroy_srq_user()\n\nWhen accessing a SRQ via the netlink path the only synchronization\nmechanism for the said SRQ is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\nib_destroy_srq_user(), which is too late, since by that point\nvendor-specific resources associated with the SRQ might already be\nfreed. This can leave a short window where the SRQ 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_srq_user(), ensuring that the SRQ is removed from restrack\nbefore its internal resources are released. This guarantees that no new\nusers hold references to a SRQ 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.","modified":"2026-09-18T03:48:40.975454025Z","published":"2026-09-17T16:10:20.775Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92510.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/88244ecc71cc0b3ed200f5ef7ddea6686adfd730"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95c992c869df54a6a7061f5f3fb6400244f2af8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c704383529044c02122f85a2a9a42cbf14a07a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bedd7dee72588c838f5b67197ea8b387e7beb918"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3d0eabe6e39b024deb3e085e2d408d037e967c3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92510.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92510"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"48f8a70e899fa4d9c8f00369f482f0382173ece9"},{"fixed":"a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9"},{"fixed":"d3d0eabe6e39b024deb3e085e2d408d037e967c3"},{"fixed":"9c704383529044c02122f85a2a9a42cbf14a07a6"},{"fixed":"bedd7dee72588c838f5b67197ea8b387e7beb918"},{"fixed":"95c992c869df54a6a7061f5f3fb6400244f2af8f"},{"fixed":"88244ecc71cc0b3ed200f5ef7ddea6686adfd730"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92510.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"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/cve-osv-conversion/osv-output/CVE-2026-92510.json"}}],"schema_version":"1.9.0"}