CVE-2026-31414
Published: Apr 13, 2026
Modified: May 11, 2026
CVSS v3.1
9.8
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.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected ea781f197d6a835cbb93a0bf88ee1696296ed8aa - < 847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781affected ea781f197d6a835cbb93a0bf88ee1696296ed8aa - < e7ccaa0a62a8ff2be5d521299ce79390c318d306affected ea781f197d6a835cbb93a0bf88ee1696296ed8aa - < 4bd1b3d839172724b33d8d02c5a4ff6a1c775417affected ea781f197d6a835cbb93a0bf88ee1696296ed8aa - < b53294bff19e56ada2f230ceb8b1ffde61cc3817affected ea781f197d6a835cbb93a0bf88ee1696296ed8aa - < 3dfd3f7712b5a800f2ba632179e9b738076a51f0+1 more versions |
Linux | Linux | affected 2.6.30unaffected 0 - < 2.6.30unaffected 6.1.168 - <= 6.1.*unaffected 6.6.134 - <= 6.6.*unaffected 6.12.81 - <= 6.12.*+3 more versions |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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