SB2026072137 - Use-after-free in Linux kernel omap2 omapfb driver
Published: July 21, 2026
Security Bulletin ID
SB2026072137
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) Use-after-free (CVE-ID: CVE-2026-53401)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to access freed physical memory.
The vulnerability exists due to a use-after-free in omapfb_mmap when racing a memory mapping request with OMAPFB_SETUP_PLANE and OMAPFB_SETUP_MEM operations. A local user can trigger concurrent framebuffer operations to access freed physical memory.
The issue is caused by inconsistent use of region data and map_count tracking across concurrent execution paths.
Remediation
Install update from vendor's website.