CVE-2025-38553 — Improper Locking in Linux
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 98.19%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedAug 19
Latest updateMar 25
Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: Restrict conditions for adding duplicating netems to qdisc tree
netem_enqueue's duplication prevention logic breaks when a netem
resides in a qdisc tree with other netems - this can lead to a
soft lockup and OOM loop in netem_dequeue, as seen in [1].
Ensure that a duplicating netem cannot exist in a tree with other
netems.
Previous approaches suggested in discussions in chronological order:
1) Track duplication st…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages3 packages
▶CVEListV5linux/linux0afb51e72855971dba83b3c6b70c547c2d1161fd — ad340a4b4adb855b18b3666f26ad65c8968e2deb+9
Also affects: Debian Linux 11.0
Patches
🔴Vulnerability Details
3GHSA▶
GHSA-p7wg-mqfq-7vvc: In the Linux kernel, the following vulnerability has been resolved:
net/sched: Restrict conditions for adding duplicating netems to qdisc tree
netem↗2025-08-19
OSV▶
CVE-2025-38553: In the Linux kernel, the following vulnerability has been resolved: net/sched: Restrict conditions for adding duplicating netems to qdisc tree netem_e↗2025-08-19