Medium 5.5Published May 5, 2026

CVE-2026-43066ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths

Updated under an hour ago (Oct 28, 2026, 10:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 builds before 0892f12cd49fde5d5db68137923db107f894f3a3; 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 builds before 5a63033696e60b5d70816f1d119645ac5b0b0a03; 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 builds before 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 before ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 before 19782b4c793b49a6aa4abbb307ddff3610009d21; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 before f7817ad399d604e8639005d87d148b5ec626ad26; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 before c426231e3d51916e83b6d1ab7ed8a65e83bca5b4; from 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2 before ec0a7500d8eace5b4f305fa0c594dd148f0e8d29	CNA record
linux linux_kernel linux:linux_kernel	from 5.10 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3	patch
https://git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03	patch
https://git.kernel.org/stable/c/9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25	patch
https://git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b	patch
https://git.kernel.org/stable/c/19782b4c793b49a6aa4abbb307ddff3610009d21	patch
https://git.kernel.org/stable/c/f7817ad399d604e8639005d87d148b5ec626ad26	patch
https://git.kernel.org/stable/c/c426231e3d51916e83b6d1ab7ed8a65e83bca5b4	patch
https://git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.