# CVE-2026-72015: fs/resctrl: Fix double-add of pseudo-locked region's RMID to free list

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

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

fs/resctrl: Fix double-add of pseudo-locked region's RMID to free list

A pseudo-locked group's RMID is freed when it is created. On unmount
rmdir_all_sub() unconditionally frees all RMID of all groups, resulting
in a double-free of the pseudo-locked group's RMID. The consequence of this
is that the original free results in the pseudo-locked group's RMID being
added to the rmid_free_lru linked list and the second free then attempts
to add the same RMID entry to the rmid_free_lru again.

Do not double-free a pseudo-locked group's RMID.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < bab7dbba38ed3011972c3d9be2dcdca7575cbe32 (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < ad12e70d7dc3c94a05efc61d1e4861078e0e162b (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < 52b769165f20b38092f28ce064b4b143471540a7 (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < 9168176894332312c12ef052e784735dbf4ffe3f (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < b2fe9e140aa94b2816aab7ebc692b543e418f5e3 (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < 52007bfdce5310e8c8a29849bfbfb188a1e50ca0 (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < f7628eea9212e185a09df3aea603ca8580b8678d (affected, git); ≥ e0bdfe8e36f3fbbdc91e70bf927f743ca23917b0; < b9f089723aee892efc77c349ae47a6b452b293c4 (affected, git). Source: CNA: Linux
- Linux / Linux: 4.19 (affected); ≥ 0; < 4.19 (unaffected, semver); ≥ 5.10.266; ≤ 5.10.* (unaffected, semver); ≥ 5.15.217; ≤ 5.15.* (unaffected, semver); ≥ 6.1.184; ≤ 6.1.* (unaffected, semver); ≥ 6.6.148; ≤ 6.6.* (unaffected, semver); ≥ 6.12.101; ≤ 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 12.16%

- 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/bab7dbba38ed3011972c3d9be2dcdca7575cbe32 (CNA: Linux)

- https://git.kernel.org/stable/c/ad12e70d7dc3c94a05efc61d1e4861078e0e162b (CNA: Linux)

- https://git.kernel.org/stable/c/52b769165f20b38092f28ce064b4b143471540a7 (CNA: Linux)

- https://git.kernel.org/stable/c/9168176894332312c12ef052e784735dbf4ffe3f (CNA: Linux)

- https://git.kernel.org/stable/c/b2fe9e140aa94b2816aab7ebc692b543e418f5e3 (CNA: Linux)

- https://git.kernel.org/stable/c/52007bfdce5310e8c8a29849bfbfb188a1e50ca0 (CNA: Linux)

- https://git.kernel.org/stable/c/f7628eea9212e185a09df3aea603ca8580b8678d (CNA: Linux)

- https://git.kernel.org/stable/c/b9f089723aee892efc77c349ae47a6b452b293c4 (CNA: Linux)

- https://git.kernel.org/stable/c/52007bfdce5310e8c8a29849bfbfb188a1e50ca0 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/52b769165f20b38092f28ce064b4b143471540a7 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/9168176894332312c12ef052e784735dbf4ffe3f (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/ad12e70d7dc3c94a05efc61d1e4861078e0e162b (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/b2fe9e140aa94b2816aab7ebc692b543e418f5e3 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/b9f089723aee892efc77c349ae47a6b452b293c4 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/bab7dbba38ed3011972c3d9be2dcdca7575cbe32 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f7628eea9212e185a09df3aea603ca8580b8678d (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72015; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72015; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72015; retrieved 2026-11-06; source updated Not reported

Revision: bbafc43f09333de02084161c936d3c3b225eeae6b538bc417c8f331ca078d093

Canonical: https://y2.dev/cve/CVE-2026-72015

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