CVE-2026-31414
Linux Kernel vulnerability
- Published13 Apr 2026
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 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
- https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
- https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
- https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
- https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
- https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
References
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
- https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
- https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
- https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
- https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
- https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
Frequently asked
Is CVE-2026-31414 being actively exploited?
CVE-2026-31414 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.76%.
How severe is CVE-2026-31414?
CVE-2026-31414 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.76% probability of exploitation.
Which products are affected by CVE-2026-31414?
Affected products include Linux Kernel.
How do I fix CVE-2026-31414?
Upgrade affected software to a fixed version, for example Linux Kernel 6.1.168 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-31414 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.