netfilter: ctnetlink: ignore explicit helper on new expectations (Linux Linux)

CVE-2026-43025
HIGH 7.3

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 2 ()
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: ignore explicit helper on new expectations Use the existing master conntrack helper, anything else is not really supported and it just makes validation more complicated, so just ignore what helper userspace suggests for this expectation. This was uncovered when validating CTA_EXPECT_CLASS via different helper provided by userspace than the existing master conntrack helper: BUG: KASAN: slab-out-of-bounds in nf_ct_expect_related_report+0x2479/0x27c0 Read of size 4 at addr ffff8880043fe408 by task poc/102 Call Trace: nf_ct_expect_related_report+0x2479/0x27c0 ctnetlink_create_expect+0x22b/0x3b0 ctnetlink_new_expect+0x4bd/0x5c0 nfnetlink_rcv_msg+0x67a/0x950 netlink_rcv_skb+0x120/0x350 Allowing to read kernel memory bytes off the expectation boundary. CTA_EXPECT_HELP_NAME is still used to offer the helper name to userspace via netlink dump.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:HLinux
CVSS 3.1HIGH 7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected bd0779370588386e4a67ba5d0b176cfded8e6a53 < e135f8e8212cbed12a03ab8dec77fa1247139897 ; affected bd0779370588386e4a67ba5d0b176cfded8e6a53 < 2ea0f35f235f70c133ad61fe05ba013753b978c6 ; affected bd0779370588386e4a67ba5d0b176cfded8e6a53 < 0f6c33697ccfac6499d0b7a4dbdec5d3a3a566cd ; affected bd0779370588386e4a67ba5d0b176cfded8e6a53 < 187b6ec5229ea93cb04c4f6d3b52efc80f513d0d ; affected bd0779370588386e4a67ba5d0b176cfded8e6a53 < 21a04c31db4057deec85fcd6cc63d720b38819c3 ; affected bd0779370588386e4a67ba5d0b176cfded8e6a53 < 917b61fa2042f11e2af4c428e43f08199586633a
Linux · Linuxaffected 3.12 ; unaffected 0 < 3.12 ; unaffected 6.1.168 ≤ 6.1.* ; unaffected 6.6.134 ≤ 6.6.* ; unaffected 6.12.81 ≤ 6.12.* ; unaffected 6.18.22 ≤ 6.18.*

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