{"id":"CVE-2026-74669","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear IPv4 options after rebasing tunnel ICMP errors\n\nip_vs_in_icmp() rebases an skb from the outer ICMP packet to the\nquoted original request before passing it t…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear IPv4 options after rebasing tunnel ICMP errors\n\nip_vs_in_icmp() rebases an skb from the outer ICMP packet to the\nquoted original request before passing it t…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 79ffa99202c944467e28b13b513bf2998732edff","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < c9413b50204738fbc429bb86bf01353c393a6c28","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 37c61b3745129cbd682c557b51345828120972e5","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < ed246dd85ebf27c1f6b7897834d40786c0ca3006","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 6f46fc460e9316062bdcdf89199eb5d7a33da33b","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 75eec935444db4af2123e0491936f6e273d7ea00","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 384b4dae14277d369221d187e9b3af56c79d2e50","Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < e0ba936287dfe9783426aac27e5fd76fe35b38c9","Linux 3.7"],"patched":["10base_smtv","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_9","enterprise_linux_baseos_v_10","enterprise_linux_baseos_v_8","enterprise_linux_baseos_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","enterprise_linux_codeready_linux_builder_v_9","enterprise_linux_hidden_v_10","enterprise_linux_real_time_for_nfv_v_10","enterprise_linux_nfv_v_8","enterprise_linux_real_time_for_nfv_v_9","enterprise_linux_real_time_v_10","enterprise_linux_rt_v_8","enterprise_linux_real_time_v_9"],"published":"2026-08-22","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:17:51.090","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74669","references":[{"url":"https://git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74669.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74669"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521375"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74669"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74669"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082229-CVE-2026-74669-f574@gregkh/T"},{"url":"https://access.redhat.com/errata/RHSA-2026:76738"},{"url":"https://access.redhat.com/errata/RHSA-2026:76739"},{"url":"https://access.redhat.com/errata/RHSA-2026:75747"},{"url":"https://access.redhat.com/errata/RHSA-2026:75746"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00514,"epssPercentile":0.43609,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-16T19:14:21.602938Z"},"scores":{"nvd":9.8,"vendor":8.8},"ingestedAt":"2026-10-14T13:30:58.532Z","slug":"CVE-2026-74669","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear IPv4 options after rebasing tunnel ICMP errors\n\nip_vs_in_icmp() rebases an skb from the outer ICMP packet to the\nquoted original request before passing it to icmp_send(). However,\nIPCB(skb)->opt still describes the outer IPv4 header.\n\nA timestamp option in the outer header can therefore leave an offset\nthat points into the quoted transport header after the rebase.\n__ip_options_echo() treats a byte at that stale location as the option\nlength and copies it into the fixed-size option storage on the\n__icmp_send() stack, causing a stack out-of-bounds write.\n\nClear the stale option metadata after resetting the network header.\nKeep the remaining control block fields, including the ingress\ninterface used by the ICMP response path.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:76738** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:76738)\n- **RHSA-2026:76739** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:76739)\n- **RHSA-2026:75747** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:75747)\n- **RHSA-2026:75746** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:75746)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74669.json)","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}