CVE-2026-74402crypto: atmel-sha204a - fix blocking and non-blocking rng logic
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from da001fb651b00e1deeaf24767dd691ae8152a4f5 before 76269a91fd9560c5f03c3e59421a0329e39a6661; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before 9039bb4f238474379221fc933c34f19f0cba501b; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before d4aa6141ff03ec82eed6fcef814300fb855ce5d8; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before e833e865e4944ba75120db534bd931db6cf677d3; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before 2fa302bbc62dec7cb6339c9494e0e3f2f884afeb; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before aac63bbea8fd5a34f1a4305cb73369068f952d32; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before 938ae1fb4a8f5db43b62b6206d409efbf317f0d9; from da001fb651b00e1deeaf24767dd691ae8152a4f5 before 319400fc5ee15db5793aa45f854968141326effc | CNA record |
References
- https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661
- https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b
- https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8
- https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3
- https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb
- https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32
- https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9
- https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.