CVE-2026-43336
Description
A flaw was found in the Linux kernel's ChaCha cryptographic algorithm implementation. The permuted_state local variable, which is sufficient to compute the original cryptographic key, was not properly zeroized before leaving its scope. This oversight could allow an attacker to recover the cryptographic key, leading to information disclosure.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Files or Directories; Read Application Data
Sensitive data may be exposed to an unauthorized actor in another control sphere. This may have a wide range of secondary consequences that will depend on what data is exposed. One possibility is the exposure of system data - such as file locations, software versions, or device data - that allow an attacker to craft a specific, more effective attack. Alternately, insufficient redaction of Private Personal Information (PPI), Personally Identifiable Information (PII), or other types of information might not harm the secure operation of the product itself, but could be violations of expectations by the product's users.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
