CVE-2026-43066

ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths

State: Published
Severity: Not scored
Published: May 5, 2026
Updated: May 11, 2026
Reserved: May 1, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 0892f12cd49fde5d5db68137923db107f894f3a3Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 5a63033696e60b5d70816f1d119645ac5b0b0a03Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50bAffected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 19782b4c793b49a6aa4abbb307ddff3610009d21Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before f7817ad399d604e8639005d87d148b5ec626ad26Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before c426231e3d51916e83b6d1ab7ed8a65e83bca5b4Affected 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before ec0a7500d8eace5b4f305fa0c594dd148f0e8d29Affected
LinuxLinux	5.10Affected before 5.10Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.168 through 6.1.Not affected 6.6.131 through 6.6.Not affected 6.12.80 through 6.12.Not affected 6.18.21 through 6.18.Not affected 6.19.11 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 0892f12cd49fde5d5db68137923db107f894f3a3Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 5a63033696e60b5d70816f1d119645ac5b0b0a03Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50bAffected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before 19782b4c793b49a6aa4abbb307ddff3610009d21Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before f7817ad399d604e8639005d87d148b5ec626ad26Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before c426231e3d51916e83b6d1ab7ed8a65e83bca5b4Affected
8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 to before ec0a7500d8eace5b4f305fa0c594dd148f0e8d29Affected

LinuxLinux

5.10Affected
before 5.10Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.168 through 6.1.*Not affected
6.6.131 through 6.6.*Not affected
6.12.80 through 6.12.*Not affected
6.18.21 through 6.18.*Not affected
6.19.11 through 6.19.*Not affected
7.0 and laterNot affected

References

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