# CVE-2026-72224: nvdimm/btt: Free arenas on btt_init() error paths

Status: published. Published: 2026-08-15. Updated: 2026-11-06.

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

nvdimm/btt: Free arenas on btt_init() error paths

The arenas allocated by discover_arenas() or create_arenas() are not
freed on some error paths in btt_init(). This leaks memory when BTT
initialization fails.

Call free_arenas() from the affected error paths to release the
allocations.

[ as: commit message and log edits ]

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 9ab5293d9ac3f2c4232220e563d04701f5f44607 (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 68c967e105d50f885e02b0dbdc9211fd5f84bdcd (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 0b63788093ff6ccfffe6e87de9e08aeeb406599c (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 5804e6a6912b5a1e47c821777d69191d69a3fe64 (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 52a7e7ece79c4b0f406149e19cd2b4b11a6c19e4 (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < f4ca396bdd60b4e0a665b2589bfc4ddbea9bda2b (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 7e49684d90faa34ff6d5586be658e986d9d475ac (affected, git); ≥ 5212e11fde4d40fa627668b4f2222d20db488f71; < 1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57 (affected, git). Source: CNA: Linux
- Linux / Linux: 4.2 (affected); ≥ 0; < 4.2 (unaffected, semver); ≥ 5.10.261; ≤ 5.10.* (unaffected, semver); ≥ 5.15.212; ≤ 5.15.* (unaffected, semver); ≥ 6.1.178; ≤ 6.1.* (unaffected, semver); ≥ 6.6.145; ≤ 6.6.* (unaffected, semver); ≥ 6.12.97; ≤ 6.12.* (unaffected, semver); ≥ 6.18.40; ≤ 6.18.* (unaffected, semver); ≥ 7.1.5; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.60%

- 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/9ab5293d9ac3f2c4232220e563d04701f5f44607 (CNA: Linux)

- https://git.kernel.org/stable/c/68c967e105d50f885e02b0dbdc9211fd5f84bdcd (CNA: Linux)

- https://git.kernel.org/stable/c/0b63788093ff6ccfffe6e87de9e08aeeb406599c (CNA: Linux)

- https://git.kernel.org/stable/c/5804e6a6912b5a1e47c821777d69191d69a3fe64 (CNA: Linux)

- https://git.kernel.org/stable/c/52a7e7ece79c4b0f406149e19cd2b4b11a6c19e4 (CNA: Linux)

- https://git.kernel.org/stable/c/f4ca396bdd60b4e0a665b2589bfc4ddbea9bda2b (CNA: Linux)

- https://git.kernel.org/stable/c/7e49684d90faa34ff6d5586be658e986d9d475ac (CNA: Linux)

- https://git.kernel.org/stable/c/1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57 (CNA: Linux)

- https://git.kernel.org/stable/c/0b63788093ff6ccfffe6e87de9e08aeeb406599c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/52a7e7ece79c4b0f406149e19cd2b4b11a6c19e4 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/5804e6a6912b5a1e47c821777d69191d69a3fe64 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/68c967e105d50f885e02b0dbdc9211fd5f84bdcd (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/7e49684d90faa34ff6d5586be658e986d9d475ac (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/9ab5293d9ac3f2c4232220e563d04701f5f44607 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f4ca396bdd60b4e0a665b2589bfc4ddbea9bda2b (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72224; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72224; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72224; retrieved 2026-11-06; source updated Not reported

Revision: aee8bd8762e424d3b19b762eaabcca7ade69b703d94c72c6bd02e46da66a0cc0

Canonical: https://y2.dev/cve/CVE-2026-72224

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