CVE-2025-37914

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Source
https://cve.org/CVERecord?id=CVE-2025-37914
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37914.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-37914
Downstream
Related
Published
2025-05-20T15:21:45.796Z
Modified
2026-03-20T12:42:33.592781Z
Summary
net_sched: ets: Fix double list add in class with netem as child qdisc
Details

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

net_sched: ets: 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 ets, 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 activelist (clis_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/

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37914.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
dcc68b4d8084e1ac9af0d4022d6b1aff6a139a33
Fixed
24388ba0a1b1b6d4af1b205927ac7f7b119ee4ea
Fixed
554acc5a2ea9703e08023eb9a003f9e5a830a502
Fixed
9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990
Fixed
72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3
Fixed
1f01e9f961605eb397c6ecd1d7b0233dfbf9077c
Fixed
bc321f714de693aae06e3786f88df2975376d996
Fixed
1a6d0c00fa07972384b0c308c72db091d49988b6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37914.json"