CVE-2026-64306VulnerabilityPublished 07/25/2026
In the Linux kernel, the following vulnerability has been resolved: crypto: drbg - Fix returning success on failure in CTR_DRBG drbg_ctr_generate()… (CVE-2026-64306)
Source GCVE Database
Severity
MediumNo CVSS score published yet
- Exploitation
Not in CISA KEV, no exploitation reported
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 4% of CVEs
What to do
AI-suggested
A fix has been implemented in the Linux kernel to correct the return status of drbg_ctr_generate() and prevent returning success on failure. Users should apply the official Linux kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: drbg - Fix returning success on failure in CTR_DRBG drbg_ctr_generate() sometimes returns success when it fails, leaving the output buffer uninitialized. Fix it.
References
- nvd.nist.gov/vuln/detail/CVE-2026-64306 (opens in a new tab)
- git.kernel.org/stable/c/074db6db03a0aaa78f05ca9d4838053713796665 (opens in a new tab)
- git.kernel.org/stable/c/23b8b188cb32e5531d0f8d3af9506f8959cb369e (opens in a new tab)
- git.kernel.org/stable/c/39a31ad9e2a5ed7e9c9c6f711dca96c8c8f5f26b (opens in a new tab)
- git.kernel.org/stable/c/75597e8774f319152744d24e0683d9393540a951 (opens in a new tab)
- git.kernel.org/stable/c/7b03312491f9fe6ba4d60c4023e7e61d2d1fed96 (opens in a new tab)
- git.kernel.org/stable/c/a9e886f73dd717027028bb7e3bbca93601ecdfc7 (opens in a new tab)
- git.kernel.org/stable/c/bbbac12083eff489b35d848332f0dff311131344 (opens in a new tab)
- git.kernel.org/stable/c/cc42fb40171c249bb859071d81b4eb007398a0bc (opens in a new tab)