CVE-2026-98345

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: check IP header size in cfg80211_classify8021d()

A frame that looks like IP can be transmitted, but be too short, so the DS field is read incorrectly:

BUG: KMSAN: uninit-value in cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 cfg80211_classify8021d+0x99d/0x12b0 net/wireless/util.c:1027 ieee80211_select_queue+0x37a/0x9e0 net/mac80211/wme.c:180 __ieee80211_subif_start_xmit+0x60f/0x1d90 net/mac80211/tx.c:4304 ieee80211_subif_start_xmit+0xa8/0x6d0 net/mac80211/tx.c:4538 … packet_sendmsg+0x9173/0xa2a0 net/packet/af_packet.c:3108

Use skb_header_pointer() like the MPLS case.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 18d5547327c202cda33ad2bbd203220c2c62c8a7affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 3ff17ffa8d02e0e3f6b2f6e57af4aac511f5b734affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < c4fbcf1e614ef0755fcc751fdfca21b0bf4e0ef7affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 12c0abd4d1c1b04a7663d04ba85268bc9ad9c017affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < f33ad4e2f846e55cf4637419268f093ac9f1a765affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < a2cdb4a675ca04c4ac8cc962848082d8ce065008affected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 65893c8d28f239c7ddad5a83683be193a9133e9baffected
LinuxLinuxe31a16d6f64ef0e324c6f54d5112703c3f13a9c4 < 48b2c5c628b09cf36cbeca53e0432fc2a7518be7affected
LinuxLinux2.6.31affected
LinuxLinux0 < 2.6.31unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References