BaselineWatch
Desk
Your fleet and your work Fleetyour releases and the hardware they run onTriagewhat needs a decisionWatchlistthe products and platforms you runSaved searchesthe lists you come back to
This instance Sourceswhat is read, how often, under what termsDigestthe daily or weekly summary, and alerts
How it is drawn Appearancethe look and the colour schemeBrandingthe mark this instance wears
Owner sign-in

CVE-2026-31685

9.4 critical SSVC exploitation: none Modified
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6t_eui64: reject invalid MAC header for all packets `eui64_mt6()` derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects an invalid MAC header when `par->fragoff != 0`. For packets with `par->fragoff == 0`, `eui64_mt6()` can still reach `eth_hdr(skb)` even when the MAC header is not valid. Fix this by removing the `par->fragoff != 0` condition so that packets with an invalid MAC header are rejected before accessing `eth_hdr(skb)`.

Fix

Patch, vendor advisory and mitigation references on NVD 5

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 2

  1. CwesCWE-125NVD modified 2026-10-19 19:18
  2. First seenCVSS 9.4 · linuxNVD modified 2026-10-15 02:19

Affected (CPE criteria) 13

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

References 9