SB20260905116 - Use-after-free in Linux kernel allwinner sun8i-ss driver
Published: September 5, 2026
Security Bulletin ID
SB20260905116
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-80833)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a use-after-free.
The vulnerability exists due to failure to stop a DMA operation after an interrupted wait in the sun8i-ss PRNG generate function when a PRNG generation operation is interrupted by a signal. A local user can interrupt a pending PRNG generation operation by sending a signal to cause a use-after-free.
The issue is limited to systems with sun8i-ss PRNG support enabled.
Remediation
Install update from vendor's website.