{"id":"CVE-2026-81001","title":"kernel: slip: fix use-after-free in sl_sync() (CVE-2026-81001)","summary":"A flaw was found in the Linux kernel's Serial Line Internet Protocol (SLIP) driver. A race condition in the `sl_sync()` function allows for a use-after-free vulnerability, where the driver attempts to access a network device pointer after …","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","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":"2026-09-14T20:35:44+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81001.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81001.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81001"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532250"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81001"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81001"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81001.mbox"},{"url":"https://git.kernel.org/stable/c/045e307ac21fbd735b789d8817b21be4d8ead054"},{"url":"https://git.kernel.org/stable/c/87398cdec8bdf84096a8af4dbccdb04f1972f32c"},{"url":"https://git.kernel.org/stable/c/e93ace1f46177a4f7b5a8e5996606cdf77e1e890"},{"url":"https://git.kernel.org/stable/c/70e20456bcbf7f3ae145bb96e5548f827a37c640"},{"url":"https://git.kernel.org/stable/c/a235b20972bbd98ca1fb127d6269434edc607f19"},{"url":"https://git.kernel.org/stable/c/486577db807891d0f964fdf13c1640c7f54b0ad1"},{"url":"https://git.kernel.org/stable/c/d6f25e5bd777b05880da8673daf74a8419480545"},{"url":"https://git.kernel.org/stable/c/2c4e7c42d77e78ad595dbb9e4b5886b58b45d89d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00159,"epssPercentile":0.05509,"scores":{"vendor":7,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-81001","body":"## Overview\n\nA flaw was found in the Linux kernel's Serial Line Internet Protocol (SLIP) driver. A race condition in the `sl_sync()` function allows for a use-after-free vulnerability, where the driver attempts to access a network device pointer after it has been freed. A local attacker could exploit this to cause a denial of service, leading to a system crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · 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-2026-81001.json)\n\n**kernel: slip: fix use-after-free in sl_sync()** — 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 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\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204143,"id":"CVE-2026-81001","ts":1789490232280,"field":"cvss","old":"7.8","new":"7"},{"seq":183807,"id":"CVE-2026-81001","ts":1789356677475,"field":"cvss","old":"7.8","new":"4.7"},{"seq":183806,"id":"CVE-2026-81001","ts":1789356677475,"field":"severity","old":"high","new":"medium"},{"seq":153192,"id":"CVE-2026-81001","ts":1789285349488,"field":"cvss","old":null,"new":"7.8"},{"seq":153191,"id":"CVE-2026-81001","ts":1789285349488,"field":"severity","old":"none","new":"high"},{"seq":147576,"id":"CVE-2026-81001","ts":1789270211451,"field":"cvss","old":null,"new":"4.7"},{"seq":147575,"id":"CVE-2026-81001","ts":1789270211451,"field":"severity","old":"none","new":"medium"},{"seq":109332,"id":"CVE-2026-81001","ts":1789183731460,"field":"cvss","old":null,"new":"4.7"},{"seq":109331,"id":"CVE-2026-81001","ts":1789183731460,"field":"severity","old":"none","new":"medium"}]}