5.5

CVE-2026-43066: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-43066DEBIAN-CVE-2026-43066
Published 05-05-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-43066 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 38
OPENSUSE-SU-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1SUSE-SU-2026:22112-1SUSE-SU-2026:22117-1SUSE-SU-2026:22127-1

Timeline

  1. 05-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.04 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < 0892f12cd49fde5d5db68137923db107f894f3a3 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < 5a63033696e60b5d70816f1d119645ac5b0b0a03 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < 9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < 19782b4c793b49a6aa4abbb307ddff3610009d21 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < f7817ad399d604e8639005d87d148b5ec626ad26 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < c426231e3d51916e83b6d1ab7ed8a65e83bca5b4 | ≥ 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2, < ec0a7500d8eace5b4f305fa0c594dd148f0e8d29 | 5.10
  • 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 | ≥ 6.19, < 6.19.11 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.11-1

3 vendors · 148 products

References

39 links
Show all 39 references