CVE-2026-43066

medium

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 f…

Vendor / product: Linux — linux kernel

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

5.5 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-05-05 16:16

Modified: 2026-11-11 21:10

NVD status: Analyzed

Last synced 5 hours ago

Verified against the source API 2026-11-11 21:11 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥5.10 <5.10.253, ≥5.11 <5.15.203, ≥5.16 <6.1.168, ≥6.2 <6.6.131, ≥6.7 <6.12.80, ≥6.13 <6.18.21

Weakness classification (CWE)

CWE-401

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3

Patch / mitigation: https://git.kernel.org/stable/c/19782b4c793b49a6aa4abbb307ddff3610009d21

Patch / mitigation: https://git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03

Patch / mitigation: https://git.kernel.org/stable/c/9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25

Patch / mitigation: https://git.kernel.org/stable/c/c426231e3d51916e83b6d1ab7ed8a65e83bca5b4

Patch / mitigation: https://git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b

Patch / mitigation: https://git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29

Patch / mitigation: https://git.kernel.org/stable/c/f7817ad399d604e8639005d87d148b5ec626ad26

References

https://git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/19782b4c793b49a6aa4abbb307ddff3610009d21 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f7817ad399d604e8639005d87d148b5ec626ad26 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 21:11 UTC · record ↗

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CVE-2026-43066

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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