CVE-2024-40972 (GCVE-0-2024-40972)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:32 – Updated: 2026-01-05 10:37
VLAI?
Title
ext4: do not create EA inode under buffer lock
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: do not create EA inode under buffer lock ext4_xattr_set_entry() creates new EA inodes while holding buffer lock on the external xattr block. This is problematic as it nests all the allocation locking (which acquires locks on other buffers) under the buffer lock. This can even deadlock when the filesystem is corrupted and e.g. quota file is setup to contain xattr block as data block. Move the allocation of EA inode out of ext4_xattr_set_entry() into the callers.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e50e5129f384ae282adebfb561189cdb19b81cee , < 0752e7fb549d90c33b4d4186f11cfd25a556d1dd (git)
Affected: e50e5129f384ae282adebfb561189cdb19b81cee , < 737fb7853acd5bc8984f6f42e4bfba3334be8ae1 (git)
Affected: e50e5129f384ae282adebfb561189cdb19b81cee , < 111103907234bffd0a34fba070ad9367de058752 (git)
Affected: e50e5129f384ae282adebfb561189cdb19b81cee , < 0a46ef234756dca04623b7591e8ebb3440622f0b (git)
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    Linux Linux Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 6.1.107 , ≤ 6.1.* (semver)
Unaffected: 6.6.47 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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  • 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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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