Bug 2460716 (CVE-2026-31529)

Summary: CVE-2026-31529 kernel: cxl/region: Fix leakage in __construct_region()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's `cxl/region` component. This vulnerability involves a resource leakage within the `__construct_region()` function. When `sysfs_update_group()` fails, the resource is not explicitly freed, leading to a memory leak. This could potentially allow a local attacker to cause a Denial of Service (DoS) by exhausting system resources.
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Description OSIDB Bzimport 2026-04-22 15:07:11 UTC 
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.
Comment 1 Keith Grant 2026-04-22 20:34:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042214-CVE-2026-31529-f32e@gregkh/T