CVE-2025-38484: iio: backend: fix out-of-bound write

Severity: high (CVSS 7.8 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: 2025-07-28 · updated 2026-07-30
Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: iio: backend: fix out-of-bound write The buffer is set to 80 character. If a caller write more characters, count is truncated to the max available space in "simple_write_to_buffer". But afterwards a string terminator is written to the buffer at offset count without boundary check. The zero termination is written OUT-OF-BOUND. Add a check that the given buffer is smaller then the buffer to prevent.

Affected products

Linux kernel: from 6.12.23 before 6.12.40; from 6.13.11 before 6.14; from 6.14.2 before 6.15.8; 6.16-rc1, 6.16-rc2, 6.16-rc3, 6.16-rc4, 6.16-rc5, 6.16-rc6 — fixed in 6.12.40, 6.14, 6.15.8

How to fix

Upgrade to a fixed version: Linux kernel 6.12.40, 6.14, 6.15.8. Check the vendor advisory for mitigations.

References

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