What’s Vulnerable › Vulnerabilities

CVE-2026-98668: iio: buffer: Ensure bounce buffer used for unaligned case is zeroed.

• Severity: unknown
• 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: 2026-10-18 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Ensure bounce buffer used for unaligned case is zeroed. iio_push_to_buffers_with_ts_unaligned() leaks uninitialized heap memory to userspace if the data passed in is not a multiple of 8 bytes and the timestamp is enabled. Specify __GFP_ZERO for the devm_krealloc() to ensure any extra space is cleared.

Affected products

• Linux: 5.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3a87212b1a09a1fdd730ce5520f7b1fc0b488511
• https://git.kernel.org/stable/c/5330036bc68d23672bfcc16c60c54701ae123083
• https://git.kernel.org/stable/c/b134ef820610bd873c9d59999d9824710964ce82
• https://git.kernel.org/stable/c/b4f53cec8cc94b37601ce0bb2b272b6753beed98
• https://git.kernel.org/stable/c/b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2
• https://git.kernel.org/stable/c/b953b8d5e6f2d53e81faa0f3b42856cdf16fe563

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