CVE-2023-53624
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2025-10-07
Modified: 2026-11-05
First seen: 2026-11-05
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < 4b8a05e3801661a0438fcd0cdef181030d966a5a |
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < d0b43125ec892aeb1b03e5df5aab595097da225a |
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < 4fbefeab88c6e79753a25099d455d3d59d2946b4 |
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < 85f24cb2f10b2b0f2882e5786a09b4790bb3a0ad |
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < 2322462d6f9ad4874f4e3c63df3b5cc00cb1acbd |
| Linux | Linux | afe4fd062416b158a8a8538b23adc1930a9b88dc < 7041101ff6c3073fd8f2e99920f535b111c929cb |
| Linux | Linux | 3.12 |
| linux | linux_kernel | 3.12 – 5.10.180 |