CVE-2025-37915 | Teknoloji dünyasından en güncel haberleri ve güvenlikle ilgili gelişmeleri takip edin.

In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: Fix double list add in class with netem as child qdisc As described in Ger…
High CVSS: 7.0

CVE-2025-37915

In the Linux kernel, the following vulnerability has been resolved:

net_sched: drr: 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 drr, there won't be a UAF, but the code will add the same
classifier to the list twice, which will cause memory corruption.

In addition to checking for qlen being zero, this patch checks whether the
class was already added to the active_list (cl_is_active) before adding
to the list to cover for the reentrant case.

[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
Vendor
Linux
Product
Linux Kernel
CWE
CWE-415
Yayın Tarihi
2025-05-20 16:15:28
Güncelleme
2025-11-17 17:00:22
Source Identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
KEV Date Added
-

Kategoriler

CWE-415 Linux Kernel HIGH Linux 2025

Referanslar

https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9 https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html