CVE-2026-31685

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31685
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)`.

9.4 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/288138418bef956f8b295751a4536c60f0e89f4a Patch
https://git.kernel.org/stable/c/309ae3e9a51a69699ca94eac5fac5688fa562d55 Patch
https://git.kernel.org/stable/c/4d75bc2cd093bf5803edf512c099bfb220fd6459
https://git.kernel.org/stable/c/7d6a57411caf54df025860c9b1a82cd42d57a562
https://git.kernel.org/stable/c/807d6ee15804df6f01a35c910f09612e858739a6 Patch
https://git.kernel.org/stable/c/9eda5478746ef7dc0e4e537b5a5e4b0ca1027091 Patch
https://git.kernel.org/stable/c/d5603591373441fecf9951833d6d873e09320f08
https://git.kernel.org/stable/c/fdce0b3590f724540795b874b4c8850c90e6b0a8 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*
History

01 Jun 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/4d75bc2cd093bf5803edf512c099bfb220fd6459 -
  • () https://git.kernel.org/stable/c/7d6a57411caf54df025860c9b1a82cd42d57a562 -
  • () https://git.kernel.org/stable/c/d5603591373441fecf9951833d6d873e09320f08 -

06 May 2026, 21:08

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/288138418bef956f8b295751a4536c60f0e89f4a - () https://git.kernel.org/stable/c/288138418bef956f8b295751a4536c60f0e89f4a - Patch
References () https://git.kernel.org/stable/c/309ae3e9a51a69699ca94eac5fac5688fa562d55 - () https://git.kernel.org/stable/c/309ae3e9a51a69699ca94eac5fac5688fa562d55 - Patch
References () https://git.kernel.org/stable/c/807d6ee15804df6f01a35c910f09612e858739a6 - () https://git.kernel.org/stable/c/807d6ee15804df6f01a35c910f09612e858739a6 - Patch
References () https://git.kernel.org/stable/c/9eda5478746ef7dc0e4e537b5a5e4b0ca1027091 - () https://git.kernel.org/stable/c/9eda5478746ef7dc0e4e537b5a5e4b0ca1027091 - Patch
References () https://git.kernel.org/stable/c/fdce0b3590f724540795b874b4c8850c90e6b0a8 - () https://git.kernel.org/stable/c/fdce0b3590f724540795b874b4c8850c90e6b0a8 - Patch

27 Apr 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.4

27 Apr 2026, 14:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/288138418bef956f8b295751a4536c60f0e89f4a -

25 Apr 2026, 09:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-25 09:16

Updated : 2026-06-01 17:16

NVD link : CVE-2026-31685

Mitre link : CVE-2026-31685

CVE.ORG link : CVE-2026-31685

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo