Riskcovery

CVE-2022-49914

btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

State
Published
Severity
Not scored
Published
May 1, 2025
Updated
May 11, 2026
Reserved
May 1, 2025

Read the record on cve.org

Description

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

btrfs: fix inode list leak during backref walking at resolve_indirect_refs()

During backref walking, at resolve_indirect_refs(), if we get an error we jump to the 'out' label and call ulist_free() on the 'parents' ulist, which frees all the elements in the ulist - however that does not free any inode lists that may be attached to elements, through the 'aux' field of a ulist node, so we end up leaking lists if we have any attached to the unodes.

Fix this by calling free_leaf_list() instead of ulist_free() when we exit from resolve_indirect_refs(). The static function free_leaf_list() is moved up for this to be possible and it's slightly simplified by removing unnecessary code.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before b1dc9019bb5f89abae85645de1a2dd4830c1f8e9Affected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before cded2c89774b99b67c98147ae103ea878c92a206Affected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before 2c0329406bb28109c07c6e23e5e3e0fa618a95d7Affected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before a52e24c7fcc3c5ce3588a14e3663c00868d36623Affected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before 6ba3479f9e96b9ad460c7e77abc26dd16e5dec4fAffected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before 396515db923ad5cbeb179d6b88927870b4cbebb7Affected
  • 3301958b7c1dae8f0f5ded63aa881e0b71e78464 to before 5614dc3a47e3310fbc77ea3b67eaadd1c6417bf1Affected
LinuxLinux
  • 3.5Affected
  • before 3.5Not affected
  • 4.14.299 through 4.14.*Not affected
  • 4.19.265 through 4.19.*Not affected
  • 5.4.224 through 5.4.*Not affected
  • 5.10.154 through 5.10.*Not affected
  • 5.15.78 through 5.15.*Not affected
  • 6.0.8 through 6.0.*Not affected
  • 6.1 and laterNot affected

References

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