CVE-2026-43336
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
lib/crypto: chacha: Zeroize permuted_state before it leaves scope
Since the ChaCha permutation is invertible, the local variable
'permuted_state' is sufficient to compute the original 'state', and thus
the key, even after the permutation has been done.
While the kernel is quite inconsistent about zeroizing secrets on the
stack (and some prominent userspace crypto libraries don't bother at all
since it's not guaranteed to work anyway), the kernel does try to do it
as a best practice, especially in cases involving the RNG.
Thus, explicitly zeroize 'permuted_state' before it goes out of scope.
https://git.kernel.org/stable/c/066c760acead1fb743bae294dbd89f479ae43b9b
https://git.kernel.org/stable/c/1933249263c3a98df79992f61a566476e4163bcc
https://git.kernel.org/stable/c/1d761e5a7340c46479fb2399598f331e4fe2c633
https://git.kernel.org/stable/c/91999af43ca2125e3b2c18fcfc02912ada02efc3
https://git.kernel.org/stable/c/b416a4245f04a450c67a13e6d96056c37c5b33fe
https://git.kernel.org/stable/c/bd62d9b44464a6c20a34a74068e7a784d0afa04a
https://git.kernel.org/stable/c/e5046823f8fa3677341b541a25af2fcb99a5b1e0
https://git.kernel.org/stable/c/e90ee961af515a484f091678ce58a4c3f7b73b02