{"api_version":"1","generated_at":"2026-08-15T08:44:36+00:00","cve":"CVE-2026-74402","urls":{"html":"https://cve.report/CVE-2026-74402","api":"https://cve.report/api/cve/CVE-2026-74402.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74402","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74402"},"summary":{"title":"crypto: atmel-sha204a - fix blocking and non-blocking rng logic","description":"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","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:42","updated_at":"2026-08-15 06:22:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3","name":"https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9","name":"https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb","name":"https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8","name":"https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661","name":"https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b","name":"https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32","name":"https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc","name":"https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74402","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74402","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 76269a91fd9560c5f03c3e59421a0329e39a6661 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 9039bb4f238474379221fc933c34f19f0cba501b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 d4aa6141ff03ec82eed6fcef814300fb855ce5d8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 e833e865e4944ba75120db534bd931db6cf677d3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 2fa302bbc62dec7cb6339c9494e0e3f2f884afeb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 aac63bbea8fd5a34f1a4305cb73369068f952d32 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 938ae1fb4a8f5db43b62b6206d409efbf317f0d9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected da001fb651b00e1deeaf24767dd691ae8152a4f5 319400fc5ee15db5793aa45f854968141326effc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/crypto/atmel-sha204a.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"76269a91fd9560c5f03c3e59421a0329e39a6661","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"9039bb4f238474379221fc933c34f19f0cba501b","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"d4aa6141ff03ec82eed6fcef814300fb855ce5d8","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"e833e865e4944ba75120db534bd931db6cf677d3","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"2fa302bbc62dec7cb6339c9494e0e3f2f884afeb","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"aac63bbea8fd5a34f1a4305cb73369068f952d32","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"938ae1fb4a8f5db43b62b6206d409efbf317f0d9","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"},{"lessThan":"319400fc5ee15db5793aa45f854968141326effc","status":"affected","version":"da001fb651b00e1deeaf24767dd691ae8152a4f5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/crypto/atmel-sha204a.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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"}],"providerMetadata":{"dateUpdated":"2026-08-15T05:59:12.747Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/76269a91fd9560c5f03c3e59421a0329e39a6661"},{"url":"https://git.kernel.org/stable/c/9039bb4f238474379221fc933c34f19f0cba501b"},{"url":"https://git.kernel.org/stable/c/d4aa6141ff03ec82eed6fcef814300fb855ce5d8"},{"url":"https://git.kernel.org/stable/c/e833e865e4944ba75120db534bd931db6cf677d3"},{"url":"https://git.kernel.org/stable/c/2fa302bbc62dec7cb6339c9494e0e3f2f884afeb"},{"url":"https://git.kernel.org/stable/c/aac63bbea8fd5a34f1a4305cb73369068f952d32"},{"url":"https://git.kernel.org/stable/c/938ae1fb4a8f5db43b62b6206d409efbf317f0d9"},{"url":"https://git.kernel.org/stable/c/319400fc5ee15db5793aa45f854968141326effc"}],"title":"crypto: atmel-sha204a - fix blocking and non-blocking rng logic","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74402","datePublished":"2026-08-15T05:59:12.747Z","dateReserved":"2026-08-15T05:44:03.892Z","dateUpdated":"2026-08-15T05:59:12.747Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:42","lastModifiedDate":"2026-08-15 06:22:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74402","Ordinal":"1","Title":"crypto: atmel-sha204a - fix blocking and non-blocking rng logic","CVE":"CVE-2026-74402","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74402","Ordinal":"1","NoteData":"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","Type":"Description","Title":"crypto: atmel-sha204a - fix blocking and non-blocking rng logic"}]}}}