{"id":"CVE-2026-90435","revision":null,"records":[{"revision":"b1894f1ff0194136a0a93916cb157bd5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90435","aliases":[],"title":"RDMA/mlx5: Fix integer overflow of user QP buffer size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix integer overflow of user QP buffer size\n\nset_user_buf_size() computes the QP buffer size by left-shifting the\nuser-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers.\nA sufficiently large rq.wqe_cnt causes signed integer overflow, which\nis undefined behavior, and yields a small or negative buf_size, causing\nib_umem_get() to map a buffer smaller than the hardware will actually\nwrite into.\n\nReplace the shifts and addition with check_shl_overflow() and\ncheck_add_overflow(), rejecting invalid user inputs.\n\nMoreover, guard the identical shift computing qp->sq.offset in\n_create_user_qp() before set_user_buf_size() is reached.","state":0,"publishedAt":"2026-09-17T16:09:54.399+00:00","modifiedAt":"2026-10-19T09:03:41.405+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/hw/mlx5/qp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"d99622e40aaa910ade681dfd4dc0fa240a011331\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"c845e5e05140ea1bc64a5b1107942d93c876034d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"42fb8aefffff5b458aaa66803364a16e0ea44129\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"d7fa2ff72ad1861eac194a4e0075d504ba8c246e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"5b6cfc6d7ff0959dd9766fdc24286a253b59ca77\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"f917707f0de0832b8ab582391b1f64e549995c6c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c\",\n \"lessThan\": \"dec47e4b0fe34afdf38caa72b4408ba95502e5de\",\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/hw/mlx5/qp.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.11\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.11\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.270\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.221\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.188\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.157\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.110\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.52\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.6\",\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/ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20","https://git.kernel.org/stable/c/d99622e40aaa910ade681dfd4dc0fa240a011331","https://git.kernel.org/stable/c/c845e5e05140ea1bc64a5b1107942d93c876034d","https://git.kernel.org/stable/c/42fb8aefffff5b458aaa66803364a16e0ea44129","https://git.kernel.org/stable/c/d7fa2ff72ad1861eac194a4e0075d504ba8c246e","https://git.kernel.org/stable/c/5b6cfc6d7ff0959dd9766fdc24286a253b59ca77","https://git.kernel.org/stable/c/f917707f0de0832b8ab582391b1f64e549995c6c","https://git.kernel.org/stable/c/dec47e4b0fe34afdf38caa72b4408ba95502e5de"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90435","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90435","identifiers":["CVE-2026-90435"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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