CVE-2026-31414

CRITICAL EPSS 29.9%
Published Apr 13, 20262mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 13, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
29.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥2.6.30  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
    Patch