SB2026081550 - Improper Initialization in Linux kernel crypto driver
Published: August 15, 2026
Security Bulletin ID
SB2026081550
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) Improper Initialization (CVE-ID: CVE-2026-74402)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to obtain insufficiently random entropy.
The vulnerability exists due to improper buffer management in the atmel-sha204a hardware random number generator driver when reading random data from the device response buffer. A local user can read from /dev/hwrng to obtain insufficiently random entropy.
The issue affects both the blocking and non-blocking rng paths.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb
- https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc
- https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661
- https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b
- https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9
- https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32
- https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8
- https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3