# CVE-2022-50020: ext4: avoid resizing to a partial cluster size

Status: published. Published: 2025-06-18. Updated: 2026-11-05.

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

ext4: avoid resizing to a partial cluster size

This patch avoids an attempt to resize the filesystem to an
unaligned cluster boundary.  An online resize to a size that is not
integral to cluster size results in the last iteration attempting to
grow the fs by a negative amount, which trips a BUG_ON and leaves the fs
with a corrupted in-memory superblock.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ d77147ff443b255d82c907a632c825b2cc610b10; < 7bdfb01fc5f6b3696728aeb527c50386e0ee09a1 (affected, git); ≥ d77147ff443b255d82c907a632c825b2cc610b10; < a6805b3dcf5cd41f2ae3a03dca43411135b99849 (affected, git); ≥ d77147ff443b255d82c907a632c825b2cc610b10; < 80288883294c5b4ed18bae0d8bd9c4a12f297074 (affected, git); ≥ d77147ff443b255d82c907a632c825b2cc610b10; < 72b850a2a996f72541172e7cf686d54a2b29bcd8 (affected, git); ≥ d77147ff443b255d82c907a632c825b2cc610b10; < 0082e99a9074ff88eff729c70c93454c8588d8e1 (affected, git); ≥ d77147ff443b255d82c907a632c825b2cc610b10; < 69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd (affected, git). Source: CNA: Linux
- Linux / Linux: 4.15 (affected); ≥ 0; < 4.15 (unaffected, semver); ≥ 4.19.256; ≤ 4.19.* (unaffected, semver); ≥ 5.4.211; ≤ 5.4.* (unaffected, semver); ≥ 5.10.138; ≤ 5.10.* (unaffected, semver); ≥ 5.15.63; ≤ 5.15.* (unaffected, semver); ≥ 5.19.4; ≤ 5.19.* (unaffected, semver); ≥ 6.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-05; percentile 11.06%

- 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/7bdfb01fc5f6b3696728aeb527c50386e0ee09a1 (CNA: Linux)

- https://git.kernel.org/stable/c/a6805b3dcf5cd41f2ae3a03dca43411135b99849 (CNA: Linux)

- https://git.kernel.org/stable/c/80288883294c5b4ed18bae0d8bd9c4a12f297074 (CNA: Linux)

- https://git.kernel.org/stable/c/72b850a2a996f72541172e7cf686d54a2b29bcd8 (CNA: Linux)

- https://git.kernel.org/stable/c/0082e99a9074ff88eff729c70c93454c8588d8e1 (CNA: Linux)

- https://git.kernel.org/stable/c/69cb8e9d8cd97cdf5e293b26d70a9dee3e35e6bd (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-50020; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-50020; retrieved 2026-11-05; source updated Not reported

Revision: c1358c93f5e4766e740abadb44ceba7d1c0182304d3ae722ff3203d30c44bb96

Canonical: https://y2.dev/cve/CVE-2022-50020

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