CVE-2026-43228CWE-617

CVE-2026-43228

Medium · published May 6, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
4.8
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

hfs: Replace BUG_ON with error handling for CNID count checks

In a06ec283e125 next_id, folder_count, and file_count in the super block

info were expanded to 64 bits, and BUG_ONs were added to detect

overflow. This triggered an error reported by syzbot: if the MDB is

corrupted, the BUG_ON is triggered. This patch replaces this mechanism

with proper error handling and resolves the syzbot reported bug.

Singed-off-by: Jori Koolstra <[email protected]>

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00160 · 4.8th percentile
Weakness
CWE-617 · Reachable Assertion
Published
2026-05-06T16:16Z
Affected products (1)
ProductVersionsFixed in
linux/linux_kernel≥ 6.18, < 6.19.66.19.6
References (3)
https://git.kernel.org/stable/c/559f856b109c45844816a1693e259f93d3556c61 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b226804532a875c10276168dc55ce752944096bd · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6536c1ced315fa645576d3a39c6e07f2a472962 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 06 MAY 11:28Z
    hfs: Replace BUG_ON with error handling for CNID count checks
    cvelistv5