{"id":"CVE-2026-80987","title":"kernel: NTB: ntb_transport: Reject oversized TX buffers (CVE-2026-80987)","summary":"A flaw was found in the Linux kernel's Non-Transparent Bridge (NTB) transport module. When processing oversized transmit (TX) buffers, the system fails to properly free the allocated memory, leading to a memory leak. This continuous leakag…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-772","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:49:51+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80987.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80987.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80987"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532223"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80987"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80987"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80987.mbox"},{"url":"https://git.kernel.org/stable/c/4890152a3069f5cb58cc24b08cfd5fe95e568fa1"},{"url":"https://git.kernel.org/stable/c/668aa3238548584ca9772da9cf43ae8c2389bbf1"},{"url":"https://git.kernel.org/stable/c/9b0fa8a9e1057614a533cc3f18b17f82aab028d8"},{"url":"https://git.kernel.org/stable/c/b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88"},{"url":"https://git.kernel.org/stable/c/a7f22105a7df8c7fd74d0af27ace6fa94fe03d87"},{"url":"https://git.kernel.org/stable/c/6b6bbc6c878d64eacc60877df49fce7b1b6a08d0"},{"url":"https://git.kernel.org/stable/c/75a604e9f1cfdebda421062fdf42225ca32154cd"},{"url":"https://git.kernel.org/stable/c/a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00508,"epssPercentile":0.42222,"scores":{"vendor":5.5,"cna":7.5},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80987","body":"## Overview\n\nA flaw was found in the Linux kernel's Non-Transparent Bridge (NTB) transport module. When processing oversized transmit (TX) buffers, the system fails to properly free the allocated memory, leading to a memory leak. This continuous leakage of memory could eventually exhaust system resources, resulting in a Denial of Service (DoS) for affected systems.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80987.json)\n\n**kernel: NTB: ntb_transport: Reject oversized TX buffers** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":204162,"id":"CVE-2026-80987","ts":1789490234947,"field":"cvss","old":"7.5","new":"5.5"},{"seq":204161,"id":"CVE-2026-80987","ts":1789490234947,"field":"severity","old":"high","new":"medium"},{"seq":183584,"id":"CVE-2026-80987","ts":1789356675984,"field":"cvss","old":"7.5","new":"4.4"},{"seq":183583,"id":"CVE-2026-80987","ts":1789356675984,"field":"severity","old":"high","new":"medium"},{"seq":153174,"id":"CVE-2026-80987","ts":1789285349406,"field":"cvss","old":null,"new":"7.5"},{"seq":153173,"id":"CVE-2026-80987","ts":1789285349406,"field":"severity","old":"none","new":"high"},{"seq":147532,"id":"CVE-2026-80987","ts":1789270211278,"field":"cvss","old":null,"new":"4.4"},{"seq":147531,"id":"CVE-2026-80987","ts":1789270211278,"field":"severity","old":"none","new":"medium"},{"seq":109288,"id":"CVE-2026-80987","ts":1789183731291,"field":"cvss","old":null,"new":"4.4"},{"seq":109287,"id":"CVE-2026-80987","ts":1789183731291,"field":"severity","old":"none","new":"medium"}]}