{"id":"CVE-2026-80984","title":"kernel: net/smc: do not dereference an unset send buffer on the SMC-D teardown path (CVE-2026-80984)","summary":"A flaw was found in the `net/smc` component of the Linux kernel. When a link group terminates while a socket is waiting in `smc_close_stream_wait()`, a NULL pointer dereference can occur during the SMC-D teardown path. This can lead to a s…","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-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:27:08+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80984.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80984.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80984"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532437"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80984"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80984"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80984.mbox"},{"url":"https://git.kernel.org/stable/c/ab26e12dd5d2f43d939fcf456933a816e81d2e51"},{"url":"https://git.kernel.org/stable/c/e3fcff8d22a6c9540748846cd800443a643553a6"},{"url":"https://git.kernel.org/stable/c/f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45"},{"url":"https://git.kernel.org/stable/c/f517cf02033801a28f98d86ca613a3533cf066b3"},{"url":"https://git.kernel.org/stable/c/b395dd319cea422239cb45b998fb38d7e373af87"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.002,"epssPercentile":0.10121,"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80984","body":"## Overview\n\nA flaw was found in the `net/smc` component of the Linux kernel. When a link group terminates while a socket is waiting in `smc_close_stream_wait()`, a NULL pointer dereference can occur during the SMC-D teardown path. This can lead to a system crash, resulting in a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80984.json)\n\n**kernel: net/smc: do not dereference an unset send buffer on the SMC-D teardown path** — rated Moderate 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 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\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 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":204165,"id":"CVE-2026-80984","ts":1789490235225,"field":"cvss","old":null,"new":"5.5"},{"seq":204164,"id":"CVE-2026-80984","ts":1789490235225,"field":"severity","old":"none","new":"medium"},{"seq":147243,"id":"CVE-2026-80984","ts":1789270203890,"field":"cvss","old":null,"new":"4.7"},{"seq":147242,"id":"CVE-2026-80984","ts":1789270203890,"field":"severity","old":"none","new":"medium"},{"seq":108994,"id":"CVE-2026-80984","ts":1789183729878,"field":"cvss","old":null,"new":"4.7"},{"seq":108993,"id":"CVE-2026-80984","ts":1789183729878,"field":"severity","old":"none","new":"medium"}]}