{"id":"CVE-2026-52908","revision":null,"records":[{"revision":"c420b0fd632a407fa81becb0c89c63a4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52908","aliases":[],"title":"RDMA: During rereg_mr ensure that REREG_ACCESS is compatible","description":"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.","state":0,"publishedAt":"2026-06-19T14:00:35.971+00:00","modifiedAt":"2026-10-19T19:36:59.343+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/umem.c\",\n \"drivers/infiniband/hw/hns/hns_roce_mr.c\",\n \"drivers/infiniband/hw/irdma/verbs.c\",\n \"drivers/infiniband/hw/mlx4/mr.c\",\n \"drivers/infiniband/hw/mlx5/mr.c\",\n \"drivers/infiniband/sw/rxe/rxe_verbs.c\",\n \"include/rdma/ib_umem.h\"\n ],\n \"versions\": [\n {\n \"version\": \"b40656aa7d559adc1fe689396dc58b92a9a27286\",\n \"lessThan\": \"09dc18894148381d3bfc550083b1236043870dce\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b40656aa7d559adc1fe689396dc58b92a9a27286\",\n \"lessThan\": \"eba5df21eda0fe7418efbea2f799f8ea1b8ca94c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b40656aa7d559adc1fe689396dc58b92a9a27286\",\n \"lessThan\": \"2904e985a2917b5dac65df82733065e78a65fc9d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b40656aa7d559adc1fe689396dc58b92a9a27286\",\n \"lessThan\": \"50334a05a950840b39a1ce3d2a173b4183db9b3e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b40656aa7d559adc1fe689396dc58b92a9a27286\",\n \"lessThan\": \"badad6fad60def1b9805559dd81dbab3d97b82aa\",\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/umem.c\",\n \"drivers/infiniband/hw/hns/hns_roce_mr.c\",\n \"drivers/infiniband/hw/irdma/verbs.c\",\n \"drivers/infiniband/hw/mlx4/mr.c\",\n \"drivers/infiniband/hw/mlx5/mr.c\",\n \"drivers/infiniband/sw/rxe/rxe_verbs.c\",\n \"include/rdma/ib_umem.h\"\n ],\n \"versions\": [\n {\n \"version\": \"6.2\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.2\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.143\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.94\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.36\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.13\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\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/09dc18894148381d3bfc550083b1236043870dce","https://git.kernel.org/stable/c/eba5df21eda0fe7418efbea2f799f8ea1b8ca94c","https://git.kernel.org/stable/c/2904e985a2917b5dac65df82733065e78a65fc9d","https://git.kernel.org/stable/c/50334a05a950840b39a1ce3d2a173b4183db9b3e","https://git.kernel.org/stable/c/badad6fad60def1b9805559dd81dbab3d97b82aa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52908","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52908","identifiers":["CVE-2026-52908"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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