netfilter: ctnetlink: use netlink policy range checks (Linux Linux)

CVE-2026-31495
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: use netlink policy range checks Replace manual range and mask validations with netlink policy annotations in ctnetlink code paths, so that the netlink core rejects invalid values early and can generate extack errors. - CTA_PROTOINFO_TCP_STATE: reject values > TCP_CONNTRACK_SYN_SENT2 at policy level, removing the manual >= TCP_CONNTRACK_MAX check. - CTA_PROTOINFO_TCP_WSCALE_ORIGINAL/REPLY: reject values > TCP_MAX_WSCALE (14). The normal TCP option parsing path already clamps to this value, but the ctnetlink path accepted 0-255, causing undefined behavior when used as a u32 shift count. - CTA_FILTER_ORIG_FLAGS/REPLY_FLAGS: use NLA_POLICY_MASK with CTA_FILTER_F_ALL, removing the manual mask checks. - CTA_EXPECT_FLAGS: use NLA_POLICY_MASK with NF_CT_EXPECT_MASK, adding a new mask define grouping all valid expect flags. Extracted from a broader nf-next patch by Florian Westphal, scoped to ctnetlink for the fixes tree.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < 435b576cd2faa75154777868f8cbb73bf71644d3 ; affected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < 2ef71307c86a9f866d6e28f1a0c06e2e9d794474 ; affected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < 4f7d25f3f0786402ba48ff7d13b6241d77d975f5 ; affected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < fcec5ce2d73a41668b24e3f18c803541602a59f6 ; affected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < 675c913b940488a84effdeeac5a1cfb657b59804 ; affected c8e2078cfe414a99cf6f2f2f1d78c7e75392e9d4 < c6cb41eaae875501eaaa487b8db6539feb092292
Linux · Linuxaffected 2.6.22 ; unaffected 0 < 2.6.22 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.168 ≤ 6.1.* ; unaffected 6.6.131 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD