{"id":"CVE-2026-98532","title":"kernel: ipv6: do not let ipv6_find_hdr() return an offset past the packet end (CVE-2026-98532)","summary":"A flaw was found in the Linux kernel. A remote attacker could cause a Denial of Service (DoS) or memory corruption by sending specially crafted IPv6 network packets. The IPv6 extension header parsing mechanism fails to verify that the decl…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-787","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","enterprise_linux 6"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:22:52+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98532.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98532.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98532"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554939"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98532"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98532"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98532.mbox"},{"url":"https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7"},{"url":"https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71"},{"url":"https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c"},{"url":"https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5"},{"url":"https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb"},{"url":"https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0"},{"url":"https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d"},{"url":"https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00613,"epssPercentile":0.49146,"scores":{"vendor":7.5,"cna":8.1},"ingestedAt":"2026-10-18T15:45:12.278Z","slug":"CVE-2026-98532","body":"## Overview\n\nA flaw was found in the Linux kernel. A remote attacker could cause a Denial of Service (DoS) or memory corruption by sending specially crafted IPv6 network packets. The IPv6 extension header parsing mechanism fails to verify that the declared length of a header fits within the received packet data, resulting in an offset that points past the end of the buffer. Subsequent networking operations that process this invalid offset perform out-of-bounds memory reads and writes, triggering a kernel crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · 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, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98532.json)\n\n**kernel: ipv6: do not let ipv6_find_hdr() return an offset past the packet end** — rated Important by Red Hat. Released 2026-10-18, updated 2026-10-24.\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- Red Hat Enterprise Linux 6\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\n## Remediation\n\nAffected\n\nWorkarounds / mitigations:\n\n- --- CME Mitigation Guidance (2026-10-20) ---\nDisclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.\n\nThe highest-value action is to enforce packet length bounds checks against skb->len within ipv6_find_hdr() extens…","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":229556,"id":"CVE-2026-98532","ts":1793019844462,"field":"cvss","old":"8.1","new":"7.5"},{"seq":228926,"id":"CVE-2026-98532","ts":1792854112459,"field":"cvss","old":null,"new":"8.1"},{"seq":228925,"id":"CVE-2026-98532","ts":1792854112459,"field":"severity","old":"none","new":"high"}]}