# CVE-2022-49811: drbd: use after free in drbd_create_device()

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

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

drbd: use after free in drbd_create_device()

The drbd_destroy_connection() frees the "connection" so use the _safe()
iterator to prevent a use after free.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < fc1897f16ebcfd22364f2afcc27f53a740f3bc7a (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < bf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1 (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < 813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5 (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < 9ed51414aef6e59e832e2960f10766dce2d5b1a1 (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < 7d93417d596402ddd46bd76c721f205d09d0d025 (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < c2a00b149836d60c222930bbea6b2139caf34d4f (affected, git); ≥ b6f85ef9538b2111a8ba0bbfae9aaebabfc94961; < a7a1598189228b5007369a9622ccdf587be0730f (affected, git). Source: CNA: Linux
- Linux / Linux: 3.15 (affected); ≥ 0; < 3.15 (unaffected, semver); ≥ 4.14.300; ≤ 4.14.* (unaffected, semver); ≥ 4.19.267; ≤ 4.19.* (unaffected, semver); ≥ 5.4.225; ≤ 5.4.* (unaffected, semver); ≥ 5.10.156; ≤ 5.10.* (unaffected, semver); ≥ 5.15.80; ≤ 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: 0.23% as of 2026-11-05; percentile 13.64%

- 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/fc1897f16ebcfd22364f2afcc27f53a740f3bc7a (CNA: Linux)

- https://git.kernel.org/stable/c/bf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1 (CNA: Linux)

- https://git.kernel.org/stable/c/813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5 (CNA: Linux)

- https://git.kernel.org/stable/c/9ed51414aef6e59e832e2960f10766dce2d5b1a1 (CNA: Linux)

- https://git.kernel.org/stable/c/7d93417d596402ddd46bd76c721f205d09d0d025 (CNA: Linux)

- https://git.kernel.org/stable/c/c2a00b149836d60c222930bbea6b2139caf34d4f (CNA: Linux)

- https://git.kernel.org/stable/c/a7a1598189228b5007369a9622ccdf587be0730f (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49811; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49811; retrieved 2026-11-05; source updated Not reported

Revision: b4418299e103faf1544834a824925ef7d4d3c7ae1243f9d9921efba8e41482cd

Canonical: https://y2.dev/cve/CVE-2022-49811

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