{"id":"CVE-2026-98524","revision":"7f39a2e0caf04877ab44ad2f5164c0d2","records":[{"revision":"7f39a2e0caf04877ab44ad2f5164c0d2","observedAt":"2026-10-24T16:17:04.479+00:00","statement":{"source":"cve-program","id":"CVE-2026-98524","aliases":[],"title":"rds: ib: Clear the sg list when mapping an MR fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrds: ib: Clear the sg list when mapping an MR fails\n\nrds_ib_map_frmr() stores the caller's scatterlist in the MR before DMA\nmapping and registration can fail. On failure, __rds_rdma_map() unpins\nthe pages and frees the scatterlist, but rds_ib_free_frmr() can still\nreturn the MR to the pool with the stale pointer set.\n\nThis leaves the pool with a dangling scatterlist and can lead to local\nprivilege escalation. KASAN detects the resulting use-after-free when the\nMR is later torn down:\n\nBUG: KASAN: slab-use-after-free in __rds_ib_teardown_mr\nRead of size 8\n\nCall Trace:\n __rds_ib_teardown_mr\n rds_ib_unreg_frmr\n rds_ib_flush_mr_pool\n rds_ib_flush_mrs\n rds_free_mr\n rds_setsockopt\n\nStore the scatterlist in the MR only after DMA mapping succeeds. If DMA\nmapping fails, return directly while the MR fields remain clear; the caller\nkeeps ownership of the scatterlist and its pinned pages. If a later\nregistration step fails, unmap the scatterlist and clear the MR fields\nbefore returning.","state":0,"publishedAt":"2026-10-18T15:17:41.42+00:00","modifiedAt":"2026-10-24T14:09:17.97+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                        \"net/rds/ib_frmr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"1be3211e6ac77adbb1eac01314d989d243b32c59\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"c42d316163f89cd23de2f3e24558177a8c29bad8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"8dca3c81344532a7f05edb3d12f31f3009410a90\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"49ba5ed0129906e0362c2e4b5e21c89b2a41e115\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"4468df5bcdef959fd96494e9968f323561a45f4c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"e2ee0616260080376123997488b5cf8a3870b8d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"b36d32f30c3f1e58e3a5ae79d0f52836a316b36e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1659185fb4d0025835eb2058a141f0746c5cab00\",\n                            \"lessThan\": \"58eb1b3325edac42dc6df72c80962bd53a3c8ca7\",\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                        \"net/rds/ib_frmr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\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/1be3211e6ac77adbb1eac01314d989d243b32c59","https://git.kernel.org/stable/c/c42d316163f89cd23de2f3e24558177a8c29bad8","https://git.kernel.org/stable/c/8dca3c81344532a7f05edb3d12f31f3009410a90","https://git.kernel.org/stable/c/49ba5ed0129906e0362c2e4b5e21c89b2a41e115","https://git.kernel.org/stable/c/4468df5bcdef959fd96494e9968f323561a45f4c","https://git.kernel.org/stable/c/e2ee0616260080376123997488b5cf8a3870b8d9","https://git.kernel.org/stable/c/b36d32f30c3f1e58e3a5ae79d0f52836a316b36e","https://git.kernel.org/stable/c/58eb1b3325edac42dc6df72c80962bd53a3c8ca7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98524","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98524","identifiers":["CVE-2026-98524"]},"retained":false,"historicalAffected":[]}],"coverage":[]}