In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - fix blocking and non-blocking rng logic The blocking and non-blocking paths were failing to provide valid entropy due to improper buffer management. Reading the buffer starting from byte 1, only fetch the 32 bytes of random data from the return message. Tested on an Atmel SHA204A device. Before (here for blocking), tests showed repeatedly reading reduced bytes. $ head -c 32 /dev/hwrng | hexdump -C 00000000 02 28 85 b3 47 40 f2 ee 00 00 00 00 00 00 00 00 |.(..G@..........| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 After, the result will be similar to the following: $ head -c 32 /dev/hwrng | hexdump -C 00000000 5a fc 3f 13 14 68 fe 06 68 0a bd 04 83 6e 09 69 |Z.?..h..h....n.i| 00000010 75 ff cf 87 10 84 3b c9 c1 df ae eb 45 53 4c c3 |u.....;.....ESL.| 00000020

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb cve-icon cve-icon
https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc cve-icon cve-icon
https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661 cve-icon cve-icon
https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b cve-icon cve-icon
https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9 cve-icon cve-icon
https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32 cve-icon cve-icon
https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8 cve-icon cve-icon
https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3 cve-icon cve-icon
History

Sat, 15 Aug 2026 06:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - fix blocking and non-blocking rng logic The blocking and non-blocking paths were failing to provide valid entropy due to improper buffer management. Reading the buffer starting from byte 1, only fetch the 32 bytes of random data from the return message. Tested on an Atmel SHA204A device. Before (here for blocking), tests showed repeatedly reading reduced bytes. $ head -c 32 /dev/hwrng | hexdump -C 00000000 02 28 85 b3 47 40 f2 ee 00 00 00 00 00 00 00 00 |.(..G@..........| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 After, the result will be similar to the following: $ head -c 32 /dev/hwrng | hexdump -C 00000000 5a fc 3f 13 14 68 fe 06 68 0a bd 04 83 6e 09 69 |Z.?..h..h....n.i| 00000010 75 ff cf 87 10 84 3b c9 c1 df ae eb 45 53 4c c3 |u.....;.....ESL.| 00000020
Title crypto: atmel-sha204a - fix blocking and non-blocking rng logic
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:59:12.747Z

Reserved: 2026-08-15T05:44:03.892Z

Link: CVE-2026-74402

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:42.220

Modified: 2026-08-15T06:22:42.220

Link: CVE-2026-74402

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.