CVE-2025-38247 (GCVE-0-2025-38247)

Vulnerability from cvelistv5 – Published: 2025-07-09 10:42 – Updated: 2025-07-28 04:16
VLAI?
Title
userns and mnt_idmap leak in open_tree_attr(2)
Summary
In the Linux kernel, the following vulnerability has been resolved: userns and mnt_idmap leak in open_tree_attr(2) Once want_mount_setattr() has returned a positive, it does require finish_mount_kattr() to release ->mnt_userns. Failing do_mount_setattr() does not change that. As the result, we can end up leaking userns and possibly mnt_idmap as well.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c4a16820d90199409c9bf01c4f794e1e9e8d8fd8 , < 142db4e76110dd80239f4e79810f85ea1735ad60 (git)
Affected: c4a16820d90199409c9bf01c4f794e1e9e8d8fd8 , < 0748e553df0225754c316a92af3a77fdc057b358 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.15.5 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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