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CVE-2026-89939: iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable

• 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: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable atlas_buffer_postenable() acquires a runtime PM reference with pm_runtime_resume_and_get() but returns the result of atlas_set_interrupt() directly. If atlas_set_interrupt() fails, the runtime PM reference is leaked and the device can never autosuspend. Add pm_runtime_put_autosuspend() on the error path to balance the reference.

Affected products

• Linux kernel: 5.14 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/43bce901047e95bbf8fb63eb471460642e497604
• https://git.kernel.org/stable/c/72daa7eb7fc6202fece0bb56487d72af5c49ccdf
• https://git.kernel.org/stable/c/777e8ebfe6b3fa733694977f0f4cf849e07e925c
• https://git.kernel.org/stable/c/a595f4d3e4ee1c91c62a298730a77b16dc26b426
• https://git.kernel.org/stable/c/aedf8f068d9da774d5cb62e9c9d6e62b2ce64d86
• https://git.kernel.org/stable/c/bcd3f72e26314edfce7eaf8d7160b3119c7b7fed
• https://git.kernel.org/stable/c/c7e91ae6d7802170f53ece09a4ecc6302265d3e4

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