# CVE-2022-49822: cifs: Fix connections leak when tlink setup failed

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

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

cifs: Fix connections leak when tlink setup failed

If the tlink setup failed, lost to put the connections, then
the module refcnt leak since the cifsd kthread not exit.

Also leak the fscache info, and for next mount with fsc, it will
print the follow errors:
  CIFS: Cache volume key already in use (cifs,127.0.0.1:445,TEST)

Let's check the result of tlink setup, and do some cleanup.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 56c762eb9bee330bb4e6d11c589434f2904d3ab6; < 775d6625f96b26b90b9be9164b855ea2c471c0e5 (affected, git); ≥ 56c762eb9bee330bb4e6d11c589434f2904d3ab6; < a9059e338fc000c0b87d8cf29e93c74fd703212e (affected, git); ≥ 56c762eb9bee330bb4e6d11c589434f2904d3ab6; < 0a087842d10b5daa123ee5291e386cdd78413705 (affected, git); ≥ 56c762eb9bee330bb4e6d11c589434f2904d3ab6; < 1dcdf5f5b2137185cbdd5385f29949ab3da4f00c (affected, git). Source: CNA: Linux
- Linux / Linux: 5.0 (affected); ≥ 0; < 5.0 (unaffected, semver); ≥ 5.10.258; ≤ 5.10.* (unaffected, semver); ≥ 5.15.81; ≤ 5.15.* (unaffected, semver); ≥ 6.0.10; ≤ 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: 0.20% as of 2026-11-05; percentile 10.37%

- 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/775d6625f96b26b90b9be9164b855ea2c471c0e5 (CNA: Linux)

- https://git.kernel.org/stable/c/a9059e338fc000c0b87d8cf29e93c74fd703212e (CNA: Linux)

- https://git.kernel.org/stable/c/0a087842d10b5daa123ee5291e386cdd78413705 (CNA: Linux)

- https://git.kernel.org/stable/c/1dcdf5f5b2137185cbdd5385f29949ab3da4f00c (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49822; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49822; retrieved 2026-11-05; source updated Not reported

Revision: 23ff0df449ca82fab4bd4c92d2b9bccad722eaa174b73ac44ac14474d3e60252

Canonical: https://y2.dev/cve/CVE-2022-49822

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