{"id":"CVE-2026-98320","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: hold reference on ct until flow is released\n\nnf_ct_put() releases the ct->ext area inmediately, the rcu typesafe\nsemantics also allow to refer to …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: hold reference on ct until flow is released\n\nnf_ct_put() releases the ct->ext area inmediately, the rcu typesafe\nsemantics also allow to refer to …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 93ff1594be1aad4da364462dd8db050ebcfda2de","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < eed6997e8dc40593a539fcc722e7ed51b18db86c","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 61c6688be282277c6e91ab286a7acd0ae8681ac6","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < a43cd2b67b91e943273c913237a7a88c50cdcfbc","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 8274cdc5f9c57e17ed77fc4ba76212536c840f25","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < 12c1ac230f4ca16e0017b62a963ab75e0b48074f","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < d9e6175a3ee48209ee65f294fc567b4e16b29b74","Linux >= 0ff90b6c20340e57616a51ae1a1bf18156d6638a < e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d","Linux 4.16"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T07:17:08.847","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98320","references":[{"url":"https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98320.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98320"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546494"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98320"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98320"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98320.mbox"},{"url":"https://access.redhat.com/errata/RHSA-2026:85773"},{"url":"https://access.redhat.com/errata/RHSA-2026:85774"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00139,"epssPercentile":0.03213,"ingestedAt":"2026-10-06T08:50:17.407Z","cwe":["CWE-825"],"scores":{"nvd":7.8,"vendor":7,"cna":7.8},"patched":["enterprise_linux_baseos_v_8","enterprise_linux_crb_v_8","enterprise_linux_nfv_v_8","enterprise_linux_rt_v_8"],"slug":"CVE-2026-98320","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: hold reference on ct until flow is released\n\nnf_ct_put() releases the ct->ext area inmediately, the rcu typesafe\nsemantics also allow to refer to the wrong conntrack from the flowtable\ndatapath. Hold reference on ct until flow is released after rcu grace\nperiod.\n\nAdd rcu_barrier() on module exit path, to ensure pending flow entries\nare release before module goes away.\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** · Important · 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 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98320.json)\n- **RHSA-2026:85773** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85773)\n- **RHSA-2026:85774** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:85774)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217324,"id":"CVE-2026-98320","ts":1791361314520,"field":"cvss","old":null,"new":"7.8"},{"seq":217323,"id":"CVE-2026-98320","ts":1791361314520,"field":"severity","old":"none","new":"high"}]}