net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak (Linux Linux)

CVE-2025-40278
Non disponible

En bref

Source
NVD
EPSS
EPSS 0.22 % · centile 12 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak Fix a KMSAN kernel-infoleak detected by the syzbot . [net?] KMSAN: kernel-infoleak in __skb_datagram_iter In tcf_ife_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied. This change silences the KMSAN report and prevents potential information leaks from the kernel memory. This fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures no infoleak.

Références

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 918e063304f945fb93be9bb70cacea07d0b730ea ; affected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 5e3644ef147bf7140259dfa4cace680c9b26fe8b ; affected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 37f0680887c5aeba9a433fe04b35169010568bb1 ; affected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 2191662058443e0bcc28d11694293d8339af6dde ; affected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < a676a296af65d33725bdf7396803180957dbd92e ; affected ef6980b6becb1afd9d82a4f043749a10ae81bf14 < d1dbbbe839647486c9b893e5011fe84a052962df
Linux · Linuxaffected 4.6 ; unaffected 0 < 4.6 ; unaffected 5.4.302 ≤ 5.4.* ; unaffected 5.10.247 ≤ 5.10.* ; unaffected 5.15.197 ≤ 5.15.* ; unaffected 6.1.159 ≤ 6.1.*

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