Fiche vulnérabilité

CVE-2025-37913 : faille élevée linux linux kernel (CVSS 7.8)

Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: qfq: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of qfq, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. This patch checks whether the class was already added to the agg->active list (cl_is_active) before doing the addition to cater for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

En bref

Sévérité: Élevée (CVSS 7.8)
Vecteur CVSS: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation active: Non signalée par la CISA
Publication: 20 mai 2025
Dernière mise à jour: 30 juil. 2026

Produits concernés

linux linux kernel
debian debian linux

Références

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