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CVE-2020-36781: i2c: imx: fix reference leak when pm_runtime_get_sync fails

• 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: 2024-02-28 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: imx: fix reference leak when pm_runtime_get_sync fails In i2c_imx_xfer() and i2c_imx_remove(), the pm reference count is not expected to be incremented on return. However, pm_runtime_get_sync will increment pm reference count even failed. Forgetting to putting operation will result in a reference leak here. Replace it with pm_runtime_resume_and_get to keep usage counter balanced.

Affected products

• Linux kernel: from 5.7 before 5.10.37; from 5.11 before 5.11.21; from 5.12 before 5.12.4 — fixed in 5.10.37, 5.11.21, 5.12.4

How to fix

Upgrade to a fixed version: Linux kernel 5.10.37, 5.11.21, 5.12.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1ecc0ebc2ebbad4a22a670a07d27a21fa0b59c77
• https://git.kernel.org/stable/c/3a0cdd336d92c429b51a79bf4f64b17eafa0325d
• https://git.kernel.org/stable/c/47ff617217ca6a13194fcb35c6c3a0c57c080693
• https://git.kernel.org/stable/c/ff406f6cd09c273337ab4854292e4aca48f8affd
• https://git.kernel.org/stable/c/1ecc0ebc2ebbad4a22a670a07d27a21fa0b59c77
• https://git.kernel.org/stable/c/3a0cdd336d92c429b51a79bf4f64b17eafa0325d
• https://git.kernel.org/stable/c/47ff617217ca6a13194fcb35c6c3a0c57c080693
• https://git.kernel.org/stable/c/ff406f6cd09c273337ab4854292e4aca48f8affd

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