What’s Vulnerable › Vulnerabilities

CVE-2026-98669: iio: buffer: serialize buffer teardown with mode claims

• 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: serialize buffer teardown with mode claims Buffer-mode claims hold mlock to guarantee that the device remains in buffer mode until the claim is released. Normal buffer updates take info_exist_lock followed by mlock in iio_update_buffers(). However, iio_device_unregister() disables and deactivates all buffers without taking mlock. This can invalidate buffer state, including active_scan_mask, while a buffer-mode claim is held. Take mlock in iio_disable_all_buffers() so that unregister honors the mode-claim lifetime guarantee. The info_exist_lock -> mlock ordering matches iio_update_buffers().

Affected products

• Linux: from 5.15.137 before 5.15.224; from 6.1.60 before 6.1.191 — fixed in 5.15.224, 6.1.191

How to fix

Upgrade to a fixed version: Linux 5.15.224, 6.1.191. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/261f54966ebf45ced5fe5e1fe5119c6c44e140ab
• https://git.kernel.org/stable/c/6a728408ff522b749c2a3c7e68f44e861fa0dbfb
• https://git.kernel.org/stable/c/84bb0fc46ccf6a545b8fdf57cda83770186ed8dd
• https://git.kernel.org/stable/c/89f3852a28fcf7bab599280cb082baa0675536db
• https://git.kernel.org/stable/c/b466db9e68b4741af85f6c017e2bb0a2f025053f
• https://git.kernel.org/stable/c/cebbecb26d22368440c4779f8275d790cf347177
• https://git.kernel.org/stable/c/e63188d77e10c0951bf67da6c295f768fd1abf4b

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