CVE-2026-58803 · Other
NO FIX YET
A comparison function named bytes_are_equal in a Rust library file lib.rs leaks side-channel information. A local attacker may use that leak to recover authentication keys.
first public Nov 10, 2026 · 1 source
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The sources do not name the affected crate or version. Teams that use a Rust library with a bytes_are_equal function for key or token comparison should check their dependencies. The sources do not say which systems are exposed.
Who cares rust
Unknown from the sources.
No fix yet, per the sources.
In bytes_are_equal of lib.rs, there is a possible way to recover authentication keys due to side channel information disclosure. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
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