{"id":"CVE-2026-92509","summary":"RDMA/core: Fix potential use after free in counter_release()","details":"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 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.","modified":"2026-09-19T03:47:31.452784589Z","published":"2026-09-17T16:10:20.100Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92509.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92509.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92509"},{"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":"99fa331dc8629be55ac7a0cca0dc56492070ddac"},{"fixed":"5eb0c57a8b568eb08f464861d84d518a2af939ac"},{"fixed":"d5cc211e8c39e46f357d30a092d683e84d560de9"},{"fixed":"2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b"},{"fixed":"8c013e3a8d8273da4d47bf1c27f016a3551996f5"},{"fixed":"64c72390d8407ea86de712a477c796b07d37abc4"},{"fixed":"235ef2d0e750885c29340b0fc40620a7a4f52e12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92509.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"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-2026-92509.json"}}],"schema_version":"1.9.0"}