net_sched: Prevent creation of classes with TC_H_ROOT (Linux Linux)

CVE-2025-21971
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.23 % · centile 14 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: Prevent creation of classes with TC_H_ROOT The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TC_H_ROOT, the traversal terminates prematurely at this class instead of reaching the actual root qdisc, causing parent statistics to be incorrectly maintained. In case of DRR, this could lead to a crash as reported by Mingi Cho. Prevent the creation of any Qdisc class with classid TC_H_ROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

Faiblesses (CWE)

  • CWE-835 — Boucle dont la condition de sortie est inatteignable (boucle infinie)

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
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 066a3b5b2346febf9a655b444567b7138e3bb939 < e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c ; affected 066a3b5b2346febf9a655b444567b7138e3bb939 < 7a82fe67a9f4d7123d8e5ba8f0f0806c28695006 ; affected 066a3b5b2346febf9a655b444567b7138e3bb939 < 003d92c91cdb5a64b25a9a74cb8543aac9a8bb48 ; affected 066a3b5b2346febf9a655b444567b7138e3bb939 < e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7 ; affected 066a3b5b2346febf9a655b444567b7138e3bb939 < 78533c4a29ac3aeddce4b481770beaaa4f3bfb67 ; affected 066a3b5b2346febf9a655b444567b7138e3bb939 < 5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7
Linux · Linuxaffected 2.6.25 ; unaffected 0 < 2.6.25 ; unaffected 5.4.292 ≤ 5.4.* ; unaffected 5.10.236 ≤ 5.10.* ; unaffected 5.15.180 ≤ 5.15.* ; unaffected 6.1.132 ≤ 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