{"schema":"threatline.record/2","record":{"id":"CVE-2026-98365","aliases":[],"summary":"RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access\n\nmr_check_range() validates that [iova, iova+length) falls within the\nregistered MR range using wraparound-prone arithmetic:\n\n    if (iova < mr->ibmr.iova ||\n        iova + length > mr->ibmr.iova + mr->ibmr.length)\n\nA remote peer can craft an RDMA-Write/Read RETH so that iova + length\nwraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the\ncheck. rxe_mr_iova_to_index() then computes a huge index (int idx, only\nguarded by WARN_ON) and rxe_mr_copy_xarray() dereferences\nmr->page_info[huge], causing an out-of-bounds read/write and a kernel\noops that is triggerable by an unauthenticated remote peer.\n\nRewrite the check in overflow-safe form; the first two clauses guarantee\nthat the subsequent subtractions do not underflow:\n\n    if (iova < mr->ibmr.iova ||\n        length > mr->ibmr.length ||\n        iova - mr->ibmr.iova > mr->ibmr.length - length)\n\nWith the fix, mr_check_range() returns -EINVAL for the crafted iova and\nthe responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","source_modified_at":"2026-10-19T09:18:17.324Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"8700e3e7c4857d28ebaa824509934556da0b3e76","lessThan":"b7d2118660545a00b21e83010ded1a231c6fb8c5","status":"affected","versionType":"git"},{"version":"8700e3e7c4857d28ebaa824509934556da0b3e76","lessThan":"5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","status":"affected","versionType":"git"},{"version":"8700e3e7c4857d28ebaa824509934556da0b3e76","lessThan":"2f3b705144e3a3c14184fec6e354680081fe91ec","status":"affected","versionType":"git"},{"version":"8700e3e7c4857d28ebaa824509934556da0b3e76","lessThan":"3431f525718f6b07da308cda6d44f8cb548bbd37","status":"affected","versionType":"git"},{"version":"8700e3e7c4857d28ebaa824509934556da0b3e76","lessThan":"d10e2a08799e858d3e71ea4169bcd018f216d444","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","source_modified_at":"2026-10-19T09:18:17.324Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","source_modified_at":"2026-10-19T09:18:17.324Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","source_modified_at":"2026-10-19T09:18:17.324Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2f3b705144e3a3c14184fec6e354680081fe91ec","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","source_modified_at":"2026-10-19T09:18:17.324Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3431f525718f6b07da308cda6d44f8cb548bbd37","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00382,"percentile":0.30981,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:46:50.834Z","modified_at":"2026-10-19T09:18:17.324Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:18:17.324Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98365","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:18:17.324Z","content_hash":"5b5205f39096ac551dd729e297861ac5007db4332c838cf25aa711f7922e1c48"}}