CVE-2026-31414

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-31414
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: use expect->helper Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe. Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0 Patch
https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417 Patch
https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781 Patch
https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817 Patch
https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306 Patch
https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d 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:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*
History

20 May 2026, 15:43

Type Values Removed Values Added
CWE NVD-CWE-noinfo
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0 - () https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0 - Patch
References () https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417 - () https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417 - Patch
References () https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781 - () https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781 - Patch
References () https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817 - () https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817 - Patch
References () https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306 - () https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306 - Patch
References () https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d - () https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d - Patch

27 Apr 2026, 14:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8

13 Apr 2026, 14:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-13 14:16

Updated : 2026-05-20 15:43

NVD link : CVE-2026-31414

Mitre link : CVE-2026-31414

CVE.ORG link : CVE-2026-31414

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo