CVE-2026-43066 (GCVE-0-2026-43066)

Vulnerability from cvelistv5 – Published: 2026-05-05 15:23 – Updated: 2026-05-11 22:17
VLAI
Title
ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths During code review, Joseph found that ext4_fc_replay_inode() calls ext4_get_fc_inode_loc() to get the inode location, which holds a reference to iloc.bh that must be released via brelse(). However, several error paths jump to the 'out' label without releasing iloc.bh: - ext4_handle_dirty_metadata() failure - sync_dirty_buffer() failure - ext4_mark_inode_used() failure - ext4_iget() failure Fix this by introducing an 'out_brelse' label placed just before the existing 'out' label to ensure iloc.bh is always released. Additionally, make ext4_fc_replay_inode() propagate errors properly instead of always returning 0.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 0892f12cd49fde5d5db68137923db107f894f3a3 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 5a63033696e60b5d70816f1d119645ac5b0b0a03 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < 19782b4c793b49a6aa4abbb307ddff3610009d21 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < f7817ad399d604e8639005d87d148b5ec626ad26 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 (git)
Affected: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 , < ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.