What’s Vulnerable › Vulnerabilities

CVE-2022-49794: iio: adc: at91_adc: fix possible memory leak in at91_adc_allocate_trigger()

• Severity: medium (CVSS 5.5 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: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: iio: adc: at91_adc: fix possible memory leak in at91_adc_allocate_trigger() If iio_trigger_register() returns error, it should call iio_trigger_free() to give up the reference that hold in iio_trigger_alloc(), so that it can call iio_trig_release() to free memory when the refcount hit to 0.

Affected products

• Linux kernel: from 3.5 before 4.9.334; from 4.10 before 4.14.300; from 4.15 before 4.19.267; from 4.20 before 5.4.225; from 5.5 before 5.10.156; from 5.11 before 5.15.80 — fixed in 4.14.300, 4.19.267, 4.9.334, 5.10.156, 5.15.80, 5.4.225

How to fix

Upgrade to a fixed version: Linux kernel 4.14.300, 4.19.267, 4.9.334, 5.10.156. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1bf8c0aff8fb5c4edf3ba6728e6bedbd610d7f4b
• https://git.kernel.org/stable/c/2b29a7f2d52fb5281b30cf61c947d88bab18a29b
• https://git.kernel.org/stable/c/65f20301607d07ee279b0804d11a05a62a6c1a1c
• https://git.kernel.org/stable/c/7b75515728b628a9a7540f201efdeb8ca7299385
• https://git.kernel.org/stable/c/85d2a8b287a89853c0dcfc5a97b5e9d36376fe37
• https://git.kernel.org/stable/c/a0d98ae5a62a7bbad8fcf9fa22e0a1274197bbc4
• https://git.kernel.org/stable/c/c27a3b6ba23350708cf5ab9962337447b51eb76d
• https://git.kernel.org/stable/c/c3ce73f60599a483dca7becd4112508833a40ef9

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