CVE-2025-37913

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Source
https://cve.org/CVERecord?id=CVE-2025-37913
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37913.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-37913
Downstream
Related
Published
2025-05-20T15:21:44.793Z
Modified
2026-05-18T05:56:17.878745487Z
Summary
net_sched: qfq: Fix double list add in class with netem as child qdisc
Details

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 (clisactive) before doing the addition to cater for the reentrant case.

[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37913.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea
Fixed
041f410aec2c1751ee22b8b73ba05d38c3a6a602
Fixed
005a479540478a820c52de098e5e767e63e36f0a
Fixed
0bf32d6fb1fcbf841bb9945570e0e2a70072c00f
Fixed
0aa23e0856b7cedb3c88d8e3d281c212c7e4fbeb
Fixed
a43783119e01849fbf2fe8855634e8989b240cb4
Fixed
53bc0b55178bd59bdd4bcd16349505cabf54b1a2
Fixed
370218e8ce711684acc4cdd3cc3c6dd7956bc165
Fixed
f139f37dcdf34b67f5bf92bc8e0f7f6b3ac63aa4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37913.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.0.0
Fixed
5.4.294
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.238
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.182
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.138
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.90
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.28
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.14.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37913.json"