Use-after-free in Linux kernel - CVE-2026-80833
Published: September 5, 2026
Vulnerability identifier: #VU147085
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-80833
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-80833
Install security update from vendor's repository.