{"id":"CVE-2026-98849","title":"kernel: pfcp: fix socket lifetime on netdevice registration failure (CVE-2026-98849)","summary":"A flaw was found in the Linux kernel's Packet Forwarding Control Protocol (PFCP) driver. When creating a PFCP network interface, a failure during device registration triggers error handling that attempts to release an internal network sock…","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-476","vendor":"Red Hat","product":"Linux","affected":["Linux >= 76c8764ef36a5d37ea2e551bda28ac7f028383ba < dcb8f6a79c3360a440c399d85df465a6e59351f1","Linux >= 76c8764ef36a5d37ea2e551bda28ac7f028383ba < 4b8ce1686dea1a10805a0807bf492409b0300ee1","Linux >= 76c8764ef36a5d37ea2e551bda28ac7f028383ba < 2cee3603ec1d9b5ec7f2121ea3efe9488e906f46","Linux >= 76c8764ef36a5d37ea2e551bda28ac7f028383ba < 0f17d2e3dd9cda3ee6d94033d5e5489af168920d","Linux 6.10"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:17:13+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98849.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98849.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98849"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555251"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98849"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98849"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98849.mbox"},{"url":"https://git.kernel.org/stable/c/dcb8f6a79c3360a440c399d85df465a6e59351f1"},{"url":"https://git.kernel.org/stable/c/4b8ce1686dea1a10805a0807bf492409b0300ee1"},{"url":"https://git.kernel.org/stable/c/2cee3603ec1d9b5ec7f2121ea3efe9488e906f46"},{"url":"https://git.kernel.org/stable/c/0f17d2e3dd9cda3ee6d94033d5e5489af168920d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.06114,"ingestedAt":"2026-10-18T16:47:32.465Z","slug":"CVE-2026-98849","body":"## Overview\n\nA flaw was found in the Linux kernel's Packet Forwarding Control Protocol (PFCP) driver. When creating a PFCP network interface, a failure during device registration triggers error handling that attempts to release an internal network socket twice. This improper cleanup results in a null pointer dereference, allowing a local user with network administration privileges to crash the system and cause a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98849.json)\n\n**kernel: pfcp: fix socket lifetime on netdevice registration failure** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\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\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228095,"id":"CVE-2026-98849","ts":1792758083483,"field":"cvss","old":null,"new":"4.7"},{"seq":228094,"id":"CVE-2026-98849","ts":1792758083483,"field":"severity","old":"none","new":"medium"}]}