What’s Vulnerable › Vulnerabilities

CVE-2022-49653: i2c: piix4: Fix a memory leak in the EFCH MMIO support

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: piix4: Fix a memory leak in the EFCH MMIO support The recently added support for EFCH MMIO regions introduced a memory leak in that code path. The leak is caused by the fact that release_resource() merely removes the resource from the tree but does not free its memory. We need to call release_mem_region() instead, which does free the memory. As a nice side effect, this brings back some symmetry between the legacy and MMIO paths.

Affected products

• Linux kernel: from 5.15.42 before 5.15.54; from 5.17.10 before 5.18.11; 5.19-rc1, 5.19-rc2, 5.19-rc3, 5.19-rc4, 5.19-rc5 — fixed in 5.15.54, 5.18.11

How to fix

Upgrade to a fixed version: Linux kernel 5.15.54, 5.18.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/8ad59b397f86a4d8014966fdc0552095a0c4fb2b
• https://git.kernel.org/stable/c/a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19
• https://git.kernel.org/stable/c/d2bf1a6480e8d44658a8ac3bdcec081238873212

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