CVE-2026-31529: cxl/region: Fix leakage in __construct_region()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-22 · updated 2026-06-17
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix leakage in __construct_region() Failing the first sysfs_update_group() needs to explicitly kfree the resource as it is too early for cxl_region_iomem_release() to do so.

Affected products

Linux kernel: from 6.19 before 6.19.11; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5 — fixed in 6.19.11

How to fix

Upgrade to a fixed version: Linux kernel 6.19.11. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/77b310bb7b5ff8c017524df83292e0242ba89791
https://git.kernel.org/stable/c/f1b4741adf08b0063291ec1b0dfa9c3d55644933

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