CVE-2026-74402
Estado: RecibidaSin puntuar—
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
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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
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.22%
- Percentil entre todas las CVEs puntuadas: 11
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- 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
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-74402",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
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"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "da001fb651b00e1deeaf24767dd691ae8152a4f5",
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},
{
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{
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{
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{
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"programFiles": [
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],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
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},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/crypto/atmel-sha204a.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:22:42.220",
"references": [
{
"url": "https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: atmel-sha204a - fix blocking and non-blocking rng logic\n\nThe blocking and non-blocking paths were failing to provide valid entropy\ndue to improper buffer management. Reading the buffer starting from byte 1,\nonly fetch the 32 bytes of random data from the return message.\n\nTested on an Atmel SHA204A device.\n\nBefore (here for blocking), tests showed repeatedly reading reduced bytes.\n$ head -c 32 /dev/hwrng | hexdump -C\n00000000 02 28 85 b3 47 40 f2 ee 00 00 00 00 00 00 00 00 |.(..G@..........|\n00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|\n00000020\n\nAfter, the result will be similar to the following:\n$ head -c 32 /dev/hwrng | hexdump -C\n00000000 5a fc 3f 13 14 68 fe 06 68 0a bd 04 83 6e 09 69 |Z.?..h..h....n.i|\n00000010 75 ff cf 87 10 84 3b c9 c1 df ae eb 45 53 4c c3 |u.....;.....ESL.|\n00000020"
}
],
"lastModified": "2026-08-17T06:19:35.390",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}