{"id":"CVE-2026-64306","state":"PUBLISHED","title":"crypto: drbg - Fix returning success on failure in CTR_DRBG","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: drbg - Fix returning success on failure in CTR_DRBG\n\ndrbg_ctr_generate() sometimes returns success when it fails, leaving the\noutput buffer uninitialized.  Fix it.","publishedAt":"2026-07-25T08:49:40.153Z","updatedAt":"2026-08-17T04:53:05.476Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"074db6db03a0aaa78f05ca9d4838053713796665","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"7b03312491f9fe6ba4d60c4023e7e61d2d1fed96","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"75597e8774f319152744d24e0683d9393540a951","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"cc42fb40171c249bb859071d81b4eb007398a0bc","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"bbbac12083eff489b35d848332f0dff311131344","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"23b8b188cb32e5531d0f8d3af9506f8959cb369e","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"a9e886f73dd717027028bb7e3bbca93601ecdfc7","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b","versionType":"git"},{"version":"f60b0fa8bbddde66f1d197be07120264b555c84a","status":"affected","versionType":"git"},{"version":"3.12.44","status":"affected","lessThan":"3.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/drbg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.1","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/drbg.c"]}],"references":["https://git.kernel.org/stable/c/074db6db03a0aaa78f05ca9d4838053713796665","https://git.kernel.org/stable/c/7b03312491f9fe6ba4d60c4023e7e61d2d1fed96","https://git.kernel.org/stable/c/75597e8774f319152744d24e0683d9393540a951","https://git.kernel.org/stable/c/cc42fb40171c249bb859071d81b4eb007398a0bc","https://git.kernel.org/stable/c/bbbac12083eff489b35d848332f0dff311131344","https://git.kernel.org/stable/c/23b8b188cb32e5531d0f8d3af9506f8959cb369e","https://git.kernel.org/stable/c/a9e886f73dd717027028bb7e3bbca93601ecdfc7","https://git.kernel.org/stable/c/39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64306.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64306","state":"PUBLISHED","datePublished":"2026-07-25T08:49:40.153Z","dateUpdated":"2026-08-17T04:53:05.476Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.779Z"},"containers":{"cna":{"title":"crypto: drbg - Fix returning success on failure in CTR_DRBG","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: drbg - Fix returning success on failure in CTR_DRBG\n\ndrbg_ctr_generate() sometimes returns success when it fails, leaving the\noutput buffer uninitialized.  Fix it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"074db6db03a0aaa78f05ca9d4838053713796665","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"7b03312491f9fe6ba4d60c4023e7e61d2d1fed96","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"75597e8774f319152744d24e0683d9393540a951","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"cc42fb40171c249bb859071d81b4eb007398a0bc","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"bbbac12083eff489b35d848332f0dff311131344","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"23b8b188cb32e5531d0f8d3af9506f8959cb369e","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"a9e886f73dd717027028bb7e3bbca93601ecdfc7","versionType":"git"},{"version":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a","status":"affected","lessThan":"39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b","versionType":"git"},{"version":"f60b0fa8bbddde66f1d197be07120264b555c84a","status":"affected","versionType":"git"},{"version":"3.12.44","status":"affected","lessThan":"3.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/drbg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.1","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["crypto/drbg.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/074db6db03a0aaa78f05ca9d4838053713796665"},{"url":"https://git.kernel.org/stable/c/7b03312491f9fe6ba4d60c4023e7e61d2d1fed96"},{"url":"https://git.kernel.org/stable/c/75597e8774f319152744d24e0683d9393540a951"},{"url":"https://git.kernel.org/stable/c/cc42fb40171c249bb859071d81b4eb007398a0bc"},{"url":"https://git.kernel.org/stable/c/bbbac12083eff489b35d848332f0dff311131344"},{"url":"https://git.kernel.org/stable/c/23b8b188cb32e5531d0f8d3af9506f8959cb369e"},{"url":"https://git.kernel.org/stable/c/a9e886f73dd717027028bb7e3bbca93601ecdfc7"},{"url":"https://git.kernel.org/stable/c/39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:53:05.476Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12.44"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}