netfilter: x_tables: guard option walkers against 1-byte tail reads (Linux Linux)

CVE-2026-43452
HIGH 8.2

En bref

Source
NVD
EPSS
EPSS 0.54 % · centile 46 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.

Faiblesses (CWE)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HLinux
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < c2a445367a496a3c25dbc940c10c8bd1cfd4c14a ; affected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < ae1e1267650638136b84c23f2b31250f0ccb6823 ; affected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < c39f84e4be1be63fc60ca7141ea7b76edcea5907 ; affected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < 9b94f0e42ed248eb31929da84ed9f5310d7ff540 ; affected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c ; affected 2e4e6a17af35be359cc8f1c924f8f198fbd478cc < bc18551c6169eac5ed813778d3e3e484002dbbe5
Linux · Linuxaffected 2.6.16 ; unaffected 0 < 2.6.16 ; unaffected 5.10.253 ≤ 5.10.* ; unaffected 5.15.203 ≤ 5.15.* ; unaffected 6.1.167 ≤ 6.1.* ; unaffected 6.6.130 ≤ 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