Improper locking in Linux kernel - CVE-2026-80871
Published: September 5, 2026
Vulnerability identifier: #VU147040
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-2026-80871
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause concurrent accesses to the TRNG device to interfere with each other.
The vulnerability exists due to improper locking in xtrng_hwrng_trng_read() when crypto_rng generation and hwrng reads run concurrently. A local user can trigger concurrent crypto_rng generation and hwrng read operations to cause concurrent accesses to the TRNG device to interfere with each other.
Affected software
Linux kernel
How to mitigate CVE-2026-80871
Install security update from vendor's repository.