{"id":"CVE-2026-80987","title":"NTB: ntb_transport: Reject oversized TX buffers","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: ntb_transport: Reject oversized TX buffers\n\nntb_process_tx() handles an oversized buffer by calling tx_handler()\nwith a NULL data pointer and returning success. nt…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-772"],"vendor":"Linux","product":"Linux","affected":["Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 4890152a3069f5cb58cc24b08cfd5fe95e568fa1","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 668aa3238548584ca9772da9cf43ae8c2389bbf1","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 9b0fa8a9e1057614a533cc3f18b17f82aab028d8","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a7f22105a7df8c7fd74d0af27ace6fa94fe03d87","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 75a604e9f1cfdebda421062fdf42225ca32154cd","Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7","Linux 3.9"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:21:52.922531Z"},"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:46:11.577Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80987","references":[{"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"},{"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"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00501,"epssPercentile":0.42712,"scores":{"cna":7.5,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80987","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nNTB: ntb_transport: Reject oversized TX buffers\n\nntb_process_tx() handles an oversized buffer by calling tx_handler()\nwith a NULL data pointer and returning success. ntb_netdev therefore\nneither frees the skb in its completion callback nor takes its enqueue\nerror path, leaking it.\n\nReject oversized buffers in ntb_transport_tx_enqueue() before acquiring\na queue entry and return -EMSGSIZE. The caller retains ownership of the\nbuffer, and the preceding netdev patch frees the skb when enqueue\nreturns this permanent error.\n\n## Affected\n\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 4890152a3069f5cb58cc24b08cfd5fe95e568fa1`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 668aa3238548584ca9772da9cf43ae8c2389bbf1`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 9b0fa8a9e1057614a533cc3f18b17f82aab028d8`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < b6db88cde0fb5c3bd2d3cd2bebcc06b5ce146e88`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a7f22105a7df8c7fd74d0af27ace6fa94fe03d87`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 6b6bbc6c878d64eacc60877df49fce7b1b6a08d0`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < 75a604e9f1cfdebda421062fdf42225ca32154cd`\n- `Linux >= fce8a7bb5b4bfb8a27324703fd5b002ee9247e90 < a4f2387db6f1cc2f03abba7f3a6807ad61e26ff7`\n- `Linux 3.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\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)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":223329,"id":"CVE-2026-80987","ts":1792180059387,"field":"cvss","old":"5.5","new":"7.5"},{"seq":223328,"id":"CVE-2026-80987","ts":1792180059387,"field":"severity","old":"medium","new":"high"},{"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"}]}