{"id":"CVE-2026-64306","summary":"crypto: drbg - Fix returning success on failure in CTR_DRBG","details":"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.","modified":"2026-07-27T04:03:21.632184313Z","published":"2026-07-25T08:49:40.153Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64306.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/074db6db03a0aaa78f05ca9d4838053713796665"},{"type":"WEB","url":"https://git.kernel.org/stable/c/23b8b188cb32e5531d0f8d3af9506f8959cb369e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/75597e8774f319152744d24e0683d9393540a951"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7b03312491f9fe6ba4d60c4023e7e61d2d1fed96"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a9e886f73dd717027028bb7e3bbca93601ecdfc7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bbbac12083eff489b35d848332f0dff311131344"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc42fb40171c249bb859071d81b4eb007398a0bc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64306.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64306"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cde001e4c3c3625c60b68a83eb1f1c2572dee07a"},{"fixed":"074db6db03a0aaa78f05ca9d4838053713796665"},{"fixed":"7b03312491f9fe6ba4d60c4023e7e61d2d1fed96"},{"fixed":"75597e8774f319152744d24e0683d9393540a951"},{"fixed":"cc42fb40171c249bb859071d81b4eb007398a0bc"},{"fixed":"bbbac12083eff489b35d848332f0dff311131344"},{"fixed":"23b8b188cb32e5531d0f8d3af9506f8959cb369e"},{"fixed":"a9e886f73dd717027028bb7e3bbca93601ecdfc7"},{"fixed":"39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"f60b0fa8bbddde66f1d197be07120264b555c84a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.12.44"},{"fixed":"3.13"}]}],"versions":["v3.12.43","v3.12.42","v3.12.41","v3.12.40","v3.12.39","v3.12.38","v3.12.37","v3.12.36","v3.12.35","v3.12.34","v3.12.33","v3.12.32","v3.12.31","v3.12.30","v3.12.29","v3.12.28","v3.12.27","v3.12.26","v3.12.25","v3.12.24","v3.12.23","v3.12.22","v3.12.21","v3.12.20","v3.12.19","v3.12.18","v3.12.17","v3.12.16","v3.12.15","v3.12.14","v3.12.13","v3.12.12","v3.12.11","v3.12.10","v3.12.9","v3.12.8","v3.12","v3.12.7","v3.12.6","v3.12.5","v3.12.4","v3.12.3","v3.12.2","v3.12.1","v3.12-rc7","v3.12-rc3","v3.12-rc6","v3.12-rc1","v3.12-rc5","v3.11","v3.12-rc2","v3.12-rc4","v3.11-rc7","v3.11-rc2","v3.11-rc5","v3.11-rc1","v3.11-rc3","v3.11-rc4","v3.11-rc6","v3.10-rc2","v3.10","v3.10-rc7","v3.10-rc6","v3.10-rc1","v3.10-rc5","v3.10-rc3","v3.10-rc4","v3.9","v3.9-rc2","v3.9-rc7","v3.9-rc8","v3.9-rc3","v3.9-rc6","v3.9-rc5","v3.9-rc4","v3.9-rc1","v3.8","v3.8-rc7","v3.8-rc6","v3.8-rc5","v3.8-rc2","v3.8-rc1","v3.8-rc3","v3.8-rc4","v3.7","v3.7-rc1","v3.6","v3.7-rc6","v3.7-rc7","v3.7-rc3","v3.7-rc8","v3.7-rc2","v3.7-rc4","v3.7-rc5","v3.6-rc7","v3.6-rc1","v3.5-rc3","v3.6-rc6","v3.6-rc5","v3.5","v3.6-rc3","v3.6-rc4","v3.6-rc2","v3.4-rc4","v3.5-rc7","v3.5-rc5","v3.5-rc6","v3.5-rc2","v3.5-rc1","v3.5-rc4","v3.4","v3.4-rc2","v3.4-rc1","v3.4-rc7","v3.4-rc6","v3.4-rc3","v3.4-rc5","v3.3","v3.3-rc6","v3.3-rc3","v3.3-rc7","v3.3-rc2","v3.3-rc5","v3.2","v3.3-rc4","v3.3-rc1","v3.2-rc4","v3.2-rc7","v3.2-rc6","v3.2-rc5","v3.2-rc3","v3.1","v3.2-rc2","v3.2-rc1","v3.1-rc1","v3.1-rc9","v3.1-rc8","v3.1-rc10","v3.1-rc7","v3.1-rc3","v3.1-rc2","v3.1-rc4","v3.1-rc5","v3.0","v3.1-rc6","v3.0-rc7","v3.0-rc4","v3.0-rc6","v3.0-rc5","v3.0-rc3","v3.0-rc1","v2.6.39","v3.0-rc2","v2.6.38","v2.6.39-rc2","v2.6.39-rc7","v2.6.39-rc5","v2.6.39-rc1","v2.6.38-rc7","v2.6.39-rc6","v2.6.39-rc4","v2.6.39-rc3","v2.6.37","v2.6.38-rc1","v2.6.38-rc8","v2.6.38-rc2","v2.6.38-rc6","v2.6.38-rc5","v2.6.38-rc4","v2.6.38-rc3","v2.6.37-rc4","v2.6.37-rc2","v2.6.36","v2.6.37-rc5","v2.6.37-rc8","v2.6.37-rc7","v2.6.37-rc6","v2.6.37-rc1","v2.6.37-rc3","v2.6.36-rc6","v2.6.35-rc4","v2.6.36-rc8","v2.6.35","v2.6.36-rc7","v2.6.36-rc3","v2.6.36-rc5","v2.6.36-rc4","v2.6.36-rc2","v2.6.36-rc1","v2.6.35-rc5","v2.6.35-rc6","v2.6.34","v2.6.35-rc3","v2.6.35-rc1","v2.6.35-rc2","v2.6.34-rc7","v2.6.34-rc6","v2.6.34-rc5","v2.6.34-rc4","v2.6.34-rc3","v2.6.34-rc2","v2.6.34-rc1","v2.6.33","v2.6.33-rc6","v2.6.33-rc8","v2.6.33-rc4","v2.6.33-rc5","v2.6.33-rc3","v2.6.33-rc7","v2.6.33-rc2","v2.6.32","v2.6.33-rc1","v2.6.32-rc8","v2.6.32-rc7","v2.6.32-rc6","v2.6.31","v2.6.32-rc5","v2.6.32-rc4","v2.6.32-rc2","v2.6.32-rc1","v2.6.32-rc3","v2.6.31-rc9","v2.6.31-rc1","v2.6.31-rc7","v2.6.31-rc8","v2.6.31-rc6","v2.6.30-rc6","v2.6.30","v2.6.31-rc4","v2.6.31-rc5","v2.6.31-rc3","v2.6.31-rc2","v2.6.30-rc7","v2.6.30-rc8","v2.6.30-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