Riskcovery

CVE-2026-74402

crypto: atmel-sha204a - fix blocking and non-blocking rng logic

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

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

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before 76269a91fd9560c5f03c3e59421a0329e39a6661Affected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before 9039bb4f238474379221fc933c34f19f0cba501bAffected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before d4aa6141ff03ec82eed6fcef814300fb855ce5d8Affected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before e833e865e4944ba75120db534bd931db6cf677d3Affected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before 2fa302bbc62dec7cb6339c9494e0e3f2f884afebAffected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before aac63bbea8fd5a34f1a4305cb73369068f952d32Affected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before 938ae1fb4a8f5db43b62b6206d409efbf317f0d9Affected
  • da001fb651b00e1deeaf24767dd691ae8152a4f5 to before 319400fc5ee15db5793aa45f854968141326effcAffected
LinuxLinux
  • 5.3Affected
  • before 5.3Not affected
  • 5.10.261 through 5.10.*Not affected
  • 5.15.212 through 5.15.*Not affected
  • 6.1.178 through 6.1.*Not affected
  • 6.6.145 through 6.6.*Not affected
  • 6.12.97 through 6.12.*Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.