{"id":"CVE-2026-80988","title":"kernel: NTB: ntb_transport: Fail TX enqueue when the QP link is down (CVE-2026-80988)","summary":"A flaw was found in the Linux kernel's Non-Transparent Bridge (NTB) transport module. When the NTB transport attempts to transmit packets while the Queue Pair (QP) link is down, the system incorrectly reports a successful transmission with…","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 10","affected":["enterprise_linux 10"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:55:24+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80988.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80988.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80988"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532251"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80988"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80988"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80988.mbox"},{"url":"https://git.kernel.org/stable/c/76c9ccc0c6bebfc74c0e727eda67687f5103ab06"},{"url":"https://git.kernel.org/stable/c/96d792c65b9d5f7f9dd86a1004315db59e450c07"},{"url":"https://git.kernel.org/stable/c/45cc11035165918dd1f81796ea98f81ece20d361"},{"url":"https://git.kernel.org/stable/c/e6cc541fab01099fd8efadfa4f13afdf118bf536"},{"url":"https://git.kernel.org/stable/c/5eca0d899a3be661a7e2caaaa7467a6fa15d756c"},{"url":"https://git.kernel.org/stable/c/894e136b432da75c0352c80299807a5c4b04f167"},{"url":"https://git.kernel.org/stable/c/89177732fe1653bbfef10cf5d99bf20cf57762c2"},{"url":"https://git.kernel.org/stable/c/873ce713fef5dde0939220f04f3484ec86a16fba"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00176,"epssPercentile":0.07443,"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80988","body":"## Overview\n\nA flaw was found in the Linux kernel's Non-Transparent Bridge (NTB) transport module. When the NTB transport attempts to transmit packets while the Queue Pair (QP) link is down, the system incorrectly reports a successful transmission without properly consuming the packet. This oversight leads to a memory leak, where system memory is not released, potentially affecting system stability and performance over an extended period.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80988.json)\n\n**kernel: NTB: ntb_transport: Fail TX enqueue when the QP link is down** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\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\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204158,"id":"CVE-2026-80988","ts":1789490234530,"field":"cvss","old":null,"new":"5.5"},{"seq":204157,"id":"CVE-2026-80988","ts":1789490234530,"field":"severity","old":"none","new":"medium"},{"seq":147500,"id":"CVE-2026-80988","ts":1789270211152,"field":"cvss","old":null,"new":"4.1"},{"seq":147499,"id":"CVE-2026-80988","ts":1789270211152,"field":"severity","old":"none","new":"medium"},{"seq":109252,"id":"CVE-2026-80988","ts":1789183731152,"field":"cvss","old":null,"new":"4.1"},{"seq":109251,"id":"CVE-2026-80988","ts":1789183731152,"field":"severity","old":"none","new":"medium"}]}