# CVE-2022-49893: cxl/region: Fix cxl_region leak, cleanup targets at region delete

Status: published. Published: 2025-05-01. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

cxl/region: Fix cxl_region leak, cleanup targets at region delete

When a region is deleted any targets that have been previously assigned
to that region hold references to it. Trigger those references to
drop by detaching all targets at unregister_region() time.

Otherwise that region object will leak as userspace has lost the ability
to detach targets once region sysfs is torn down.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ b9686e8c8e39d4072081ef078c04915ee51c8af4; < 45d9fb4b758b9d602ee7776eb6754b0349946aad (affected, git); ≥ b9686e8c8e39d4072081ef078c04915ee51c8af4; < 0d9e734018d70cecf79e2e4c6082167160a0f13f (affected, git). Source: CNA: Linux
- Linux / Linux: 6.0 (affected); ≥ 0; < 6.0 (unaffected, semver); ≥ 6.0.8; ≤ 6.0.* (unaffected, semver); ≥ 6.1; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.17% as of 2026-11-05; percentile 6.44%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/45d9fb4b758b9d602ee7776eb6754b0349946aad (CNA: Linux)

- https://git.kernel.org/stable/c/0d9e734018d70cecf79e2e4c6082167160a0f13f (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49893; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49893; retrieved 2026-11-05; source updated Not reported

Revision: ce8977e260045f68d52cbcfe1f4857f1ef169c59740dcd5b2fdb2d97d0cb8bad

Canonical: https://y2.dev/cve/CVE-2022-49893

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