{"id":"CVE-2026-52908","summary":"RDMA: During rereg_mr ensure that REREG_ACCESS is compatible","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA: During rereg_mr ensure that REREG_ACCESS is compatible\n\nIf IB_MR_REREG_ACCESS changes from RO to RW then the umem has to be\nre-evaluated to ensure it is properly pinned as RW. Since the umem is\nhidden inside each driver's mr struct add a ib_umem_check_rereg() function\nthat each driver has to call before processing IB_MR_REREG_ACCESS.\n\nmlx4 has to retain its duplicate ib_access_writable check because it\nimplements IB_MR_REREG_ACCESS | IB_MR_REREG_TRANS by changing both items\nin place sequentially while the MR is live, so it will continue to not\nsupport this combination.","modified":"2026-06-23T04:01:48.671793161Z","published":"2026-06-19T14:00:35.971Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52908.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/09dc18894148381d3bfc550083b1236043870dce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52908.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52908"},{"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":"b40656aa7d559adc1fe689396dc58b92a9a27286"},{"fixed":"09dc18894148381d3bfc550083b1236043870dce"},{"fixed":"eba5df21eda0fe7418efbea2f799f8ea1b8ca94c"},{"fixed":"2904e985a2917b5dac65df82733065e78a65fc9d"},{"fixed":"50334a05a950840b39a1ce3d2a173b4183db9b3e"},{"fixed":"badad6fad60def1b9805559dd81dbab3d97b82aa"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-52908.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.94"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-52908.json"}}],"schema_version":"1.7.5"}