Linux vulnerability

What happened

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.

Affected versions

Linux: e27e3dac651771fe3250f6305dee277bce29fc5d through before a60794ee3f453516ab3ed212ba0295ecf890bc8c (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before f856511058c8cb470d6c6c7ce908870adcdc7dc6 (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before 656e2fe98ac452db4e5b8147d1f33b8c35b4ec4b (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before 541fc6f733b32463cf23277637bb07e2aaa00b53 (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before ea01c061d839b520f385f112908de1c6e3391327 (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before 528052af901d6e6bbfa0e52362a70a58a5dd1e43 (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before 0e022ee4f8e0dc843ba4c80bb75408a7704279af (git); e27e3dac651771fe3250f6305dee277bce29fc5d through before 66cc9dec919dd63d8e4b3d386f7aed3ae684e645 (git); 2.6.23 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.