CVE-2025-38637

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

net_sched: skbprio: Remove overly strict queue assertions

In the current implementation, skbprio enqueue/dequeue contains an assertion
that fails under certain conditions when SKBPRIO is used as a child qdisc under
TBF with specific parameters. The failure occurs because TBF sometimes peeks at
packets in the child qdisc without actually dequeuing them when tokens are
unavailable.

This peek operation creates a discrepancy between the parent and child qdisc
queue length counters. When TBF later receives a high-priority packet,
SKBPRIO's queue length may show a different value than what's reflected in its
internal priority queue tracking, triggering the assertion.

The fix removes this overly strict assertions in SKBPRIO, they are not
necessary at all.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
LinuxCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 5%
VendorProductVersion
linuxlinux_kernel
4.19 ≤
𝑥
< 5.4.292
linuxlinux_kernel
5.5 ≤
𝑥
< 5.10.236
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.180
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.134
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.87
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.23
linuxlinux_kernel
6.13 ≤
𝑥
< 6.13.11
linuxlinux_kernel
6.14 ≤
𝑥
< 6.14.2
debiandebian_linux
11.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
vulnerable
bullseye (security)
5.10.244-1
fixed
bookworm
6.1.148-1
fixed
bookworm (security)
6.1.158-1
fixed
trixie
6.12.57-1
fixed
trixie (security)
6.12.48-1
fixed
forky
6.17.9-1
fixed
sid
6.17.10-1
fixed
linux-6.1
bullseye (security)
6.1.158-1~deb11u1
fixed