SB20260528136 - NULL pointer dereference in Linux kernel erofs
Published: May 28, 2026
Security Bulletin ID
SB20260528136
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-45943)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in z_erofs_decompress_pcluster() when processing inline data for ztailpacking pclusters during file reads. A local user can read a crafted erofs image to cause a denial of service.
The issue may occur if a fatal signal arrives while read_mapping_folio() is running.
Remediation
Install update from vendor's website.