{"id":"CVE-2026-98365","published":"2026-10-06T09:18:30Z","modified":"2026-10-19T10:18:39Z","title":"In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix integer overflow in mr_check_range()…","vendor":"Linux","product":"Linux","tier":"core","eol":null,"description":{"text":"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.","provenance":"source","from":"NVD"},"summary":{"text":"An integer overflow in the Linux kernel's RDMA/rxe mr_check_range() allows an unauthenticated remote peer to bypass range validation and trigger an out-of-bounds read/write, causing a kernel oops. Linux systems using RDMA/rxe are affected.","provenance":"ai","model":"deepseek-v4-flash","generatedAt":"2026-10-23T03:20:55Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.00377,"percentile":0.31683,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":null,"cwes":[],"references":[{"url":"https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec","tags":[]},{"url":"https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37","tags":[]},{"url":"https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","tags":[]},{"url":"https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5","tags":[]},{"url":"https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-93350","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93350","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-06","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98365","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":13.2,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":6.34,"detail":"percentile 0.3168"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}