{"id":"CVE-2026-80982","title":"kernel: net/smc: fix use-after-free in smc_rx_pipe_buf_release() (CVE-2026-80982)","summary":"A flaw was found in the Linux kernel's Shared Memory Communications (SMC) network protocol. A race condition occurs when a network connection is closed while the system is still processing its receive buffer pages. This can lead to a use-a…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-416","CWE-825"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-10-24","sourceUpdated":"2026-10-24T04:49:23+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80982.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80982.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80982"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532370"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80982"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80982"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80982.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80982"},{"url":"https://git.kernel.org/stable/c/dadd97c8296b23aa816e91ed70041820ae087baa"},{"url":"https://git.kernel.org/stable/c/df441f3efbb50eb0f120b8de4bf441c31fb0551d"},{"url":"https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f"},{"url":"https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837"},{"url":"https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d"},{"url":"https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00164,"epssPercentile":0.05554,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:21:50.317154Z"},"scores":{"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-80982","body":"## Overview\n\nA flaw was found in the Linux kernel's Shared Memory Communications (SMC) network protocol. A race condition occurs when a network connection is closed while the system is still processing its receive buffer pages. This can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. An attacker could potentially exploit this flaw to cause a denial of service, leading to system instability or crashes.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, 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 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80982.json)\n\n**kernel: net/smc: fix use-after-free in smc_rx_pipe_buf_release()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\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 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- Red Hat Enterprise Linux 7\n\n## Remediation\n\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228542,"id":"CVE-2026-80982","ts":1792844779468,"field":"cvss","old":"7.8","new":"4.7"},{"seq":228541,"id":"CVE-2026-80982","ts":1792844779468,"field":"severity","old":"high","new":"medium"},{"seq":223327,"id":"CVE-2026-80982","ts":1792180058951,"field":"cvss","old":"7","new":"7.8"},{"seq":204174,"id":"CVE-2026-80982","ts":1789490236057,"field":"cvss","old":"7.8","new":"7"},{"seq":183594,"id":"CVE-2026-80982","ts":1789356676027,"field":"cvss","old":"7.8","new":"4.7"},{"seq":183593,"id":"CVE-2026-80982","ts":1789356676027,"field":"severity","old":"high","new":"medium"},{"seq":153168,"id":"CVE-2026-80982","ts":1789285349382,"field":"cvss","old":null,"new":"7.8"},{"seq":153167,"id":"CVE-2026-80982","ts":1789285349382,"field":"severity","old":"none","new":"high"},{"seq":147329,"id":"CVE-2026-80982","ts":1789270210478,"field":"cvss","old":null,"new":"4.7"},{"seq":147328,"id":"CVE-2026-80982","ts":1789270210478,"field":"severity","old":"none","new":"medium"},{"seq":109074,"id":"CVE-2026-80982","ts":1789183730205,"field":"cvss","old":null,"new":"4.7"},{"seq":109073,"id":"CVE-2026-80982","ts":1789183730205,"field":"severity","old":"none","new":"medium"}]}