{"id":"CVE-2026-97998","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: cope with concurrent instance destruction\n\nInstances are refcounted","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: cope with concurrent instance destruction\n\nInstances are refcounted. However, only memory release happens on the\n1 -> 0 transition; the unlink…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < c5c89beaa628d6ac527c6eb2e01b2b52eb417f59","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 042465e7d3d3127e21f04e42c1639e2518b98915","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 291685fc8d2e4cf75ed3a23c810883653f407f46","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 3161186a2ff81288e9a5f35daf1911153764ecae","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 0234d7ca0317be0a623300e1693cd794bbfdf8af","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 1a7a8ac9a9f0ad0d410c901cb6f233833518844c","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb","Linux >= 0597f2680d666a3bcf101ac0c771ba7e50016bbd < 387d744fa7e499d2c3748a4e60e02ebb24e7fb16","Linux 2.6.14"],"published":"2026-09-25","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:18:23.370","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97998","references":[{"url":"https://git.kernel.org/stable/c/0234d7ca0317be0a623300e1693cd794bbfdf8af","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/042465e7d3d3127e21f04e42c1639e2518b98915","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1a7a8ac9a9f0ad0d410c901cb6f233833518844c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/291685fc8d2e4cf75ed3a23c810883653f407f46","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3161186a2ff81288e9a5f35daf1911153764ecae","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/387d744fa7e499d2c3748a4e60e02ebb24e7fb16","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c5c89beaa628d6ac527c6eb2e01b2b52eb417f59","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2dd0f1f8c4e6334699ea6382e52f6da0c7e45eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97998.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97998"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541175"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97998"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97998"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97998.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00216,"epssPercentile":0.11987,"ingestedAt":"2026-09-25T11:06:38.863Z","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-366"],"slug":"CVE-2026-97998","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: cope with concurrent instance destruction\n\nInstances are refcounted. However, only memory release happens on the\n1 -> 0 transition; the unlink from hashes can occur with any refcount.\n\nUncooperative userspace can force a situation where a queue is pending\nfor destruction from netlink event while a different socket with same\nportid processes an UNBIND request.\n\nWith right timing, this will unhash the instance again:\n\nOops: general protection fault, [..]\nCall Trace:\n <TASK>\n nfulnl_recv_config+0x31a/0xd50\n nfnetlink_rcv_msg+0x7c2/0xeb0\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, 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 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97998.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224205,"id":"CVE-2026-97998","ts":1792325012128,"field":"cvss","old":null,"new":"5.5"},{"seq":224204,"id":"CVE-2026-97998","ts":1792325012128,"field":"severity","old":"none","new":"medium"}]}