{"id":"CVE-2026-98345","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: check IP header size in cfg80211_classify8021d()\n\nA frame that looks like IP can be transmitted, but be too short, so\nthe DS field is read incorrectly:\n…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: check IP header size in cfg80211_classify8021d()\n\nA frame that looks like IP can be transmitted, but be too short, so\nthe DS field is read incorrectly:\n…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 18d5547327c202cda33ad2bbd203220c2c62c8a7","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 12c0abd4d1c1b04a7663d04ba85268bc9ad9c017","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < f33ad4e2f846e55cf4637419268f093ac9f1a765","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < a2cdb4a675ca04c4ac8cc962848082d8ce065008","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 65893c8d28f239c7ddad5a83683be193a9133e9b","Linux >= e31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 48b2c5c628b09cf36cbeca53e0432fc2a7518be7","Linux 2.6.31"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:27.480","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98345","references":[{"url":"https://git.kernel.org/stable/c/12c0abd4d1c1b04a7663d04ba85268bc9ad9c017","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/18d5547327c202cda33ad2bbd203220c2c62c8a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/48b2c5c628b09cf36cbeca53e0432fc2a7518be7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/65893c8d28f239c7ddad5a83683be193a9133e9b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a2cdb4a675ca04c4ac8cc962848082d8ce065008","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f33ad4e2f846e55cf4637419268f093ac9f1a765","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98345.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98345"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546502"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98345"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98345"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98345.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-06T08:50:17.398Z","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-908"],"epss":0.00177,"epssPercentile":0.0717,"slug":"CVE-2026-98345","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: check IP header size in cfg80211_classify8021d()\n\nA frame that looks like IP can be transmitted, but be too short, so\nthe DS field is read incorrectly:\n\n  BUG: KMSAN: uninit-value in cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027\n   cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027\n   ieee80211_select_queue+0x37a/0x9e0 net/mac80211/wme.c:180\n   __ieee80211_subif_start_xmit+0x60f/0x1d90 net/mac80211/tx.c:4304\n   ieee80211_subif_start_xmit+0xa8/0x6d0 net/mac80211/tx.c:4538\n   ...\n   packet_sendmsg+0x9173/0xa2a0 net/packet/af_packet.c:3108\n\nUse skb_header_pointer() like the MPLS case.\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** · Low · 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 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98345.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219137,"id":"CVE-2026-98345","ts":1791707071453,"field":"cvss","old":null,"new":"5.5"},{"seq":219136,"id":"CVE-2026-98345","ts":1791707071453,"field":"severity","old":"none","new":"medium"}]}