{"id":"CVE-2026-98365","title":"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…","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < b7d2118660545a00b21e83010ded1a231c6fb8c5","Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 2f3b705144e3a3c14184fec6e354680081fe91ec","Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 3431f525718f6b07da308cda6d44f8cb548bbd37","Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < d10e2a08799e858d3e71ea4169bcd018f216d444","Linux 4.8"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:30.677","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98365","references":[{"url":"https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.393Z","slug":"CVE-2026-98365","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}