In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_fq: fix integer overflow of "credit"
if sch_fq is configured with "initial quantum" having values greater than
INT_MAX, the first assignment of "credit" does signed integer overflow to
a very negative value.
In this situation, the syzkaller script provided by Cristoph triggers the
CPU soft-lockup warning even with few sockets. It's not an infinite loop,
but "credit" wasn't probably meant to be minus 2Gb for each new flow.
Capping "initial quantum" to INT_MAX proved to fix the issue.
v2: validation of "initial quantum" is done in fq_policy, instead of open
coding in fq_change() _ suggested by Jakub Kicinski
References
Configurations
Configuration 1 (hide)
|
History
05 Feb 2026, 14:32
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-190 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/2322462d6f9ad4874f4e3c63df3b5cc00cb1acbd - Patch | |
| References | () https://git.kernel.org/stable/c/4b8a05e3801661a0438fcd0cdef181030d966a5a - Patch | |
| References | () https://git.kernel.org/stable/c/4fbefeab88c6e79753a25099d455d3d59d2946b4 - Patch | |
| References | () https://git.kernel.org/stable/c/7041101ff6c3073fd8f2e99920f535b111c929cb - Patch | |
| References | () https://git.kernel.org/stable/c/85f24cb2f10b2b0f2882e5786a09b4790bb3a0ad - Patch | |
| References | () https://git.kernel.org/stable/c/d0b43125ec892aeb1b03e5df5aab595097da225a - Patch |
07 Oct 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-07 16:15
Updated : 2026-02-05 14:32
NVD link : CVE-2023-53624
Mitre link : CVE-2023-53624
CVE.ORG link : CVE-2023-53624
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-190
Integer Overflow or Wraparound