Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-53027
Published: June 25, 2026
Vulnerability identifier: #VU135321
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53027
CWE-ID: CWE-703
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of attribute segment run loading in attr_data_get_block_locked() when processing compressed or sparse attributes with frame-aligned clusters. A local user can trigger the affected code path to cause a denial of service.
The issue is triggered when vcn is rounded down to the frame start and vcn and vcn0 reside in different attribute segments.
How to mitigate CVE-2026-53027
Install security update from vendor's repository.