CVE-2024-40972

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe50e5129f384ae282adebfb561189cdb19b81cee < 0752e7fb549d90c33b4d4186f11cfd25a556d1ddaffected
LinuxLinuxe50e5129f384ae282adebfb561189cdb19b81cee < 737fb7853acd5bc8984f6f42e4bfba3334be8ae1affected
LinuxLinuxe50e5129f384ae282adebfb561189cdb19b81cee < 111103907234bffd0a34fba070ad9367de058752affected
LinuxLinuxe50e5129f384ae282adebfb561189cdb19b81cee < 0a46ef234756dca04623b7591e8ebb3440622f0baffected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
LinuxLinux6.1.107 <= 6.1.*unaffected
LinuxLinux6.6.47 <= 6.6.*unaffected
LinuxLinux6.9.7 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References