CVE-2024-35925: block: prevent division by zero in blk_rq_stat_sum()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-19 · updated 2026-10-15
Weakness: CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: block: prevent division by zero in blk_rq_stat_sum() The expression dst->nr_samples + src->nr_samples may have zero value on overflow. It is necessary to add a check to avoid division by zero. Found by Linux Verification Center (linuxtesting.org) with Svace.

Affected products

Debian Linux: 10.0
Linux kernel: before 4.19.312; from 4.20 before 5.4.274; from 5.5 before 5.10.215; from 5.11 before 5.15.155; from 5.16 before 6.1.86; from 6.2 before 6.6.27 — fixed in 4.19.312, 5.10.215, 5.15.155, 5.4.274, 6.1.86, 6.6.27

How to fix

Upgrade to a fixed version: Linux kernel 4.19.312, 5.10.215, 5.15.155, 5.4.274. Check the vendor advisory for mitigations.

References

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