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.
History

Sat, 16 May 2026 02:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-255

Sat, 16 May 2026 00:15:00 +0000


Fri, 15 May 2026 22:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-255

Fri, 15 May 2026 20:00:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*

Mon, 11 May 2026 18:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-255

Mon, 11 May 2026 09:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
CWE-319

Mon, 11 May 2026 07:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


Fri, 08 May 2026 19:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284
CWE-319

Fri, 08 May 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title lib/crypto: chacha: Zeroize permuted_state before it leaves scope
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-05-08T13:31:22.280Z

Updated: 2026-05-11T22:22:35.963Z

Reserved: 2026-05-01T14:12:56.002Z

Link: CVE-2026-43336

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T14:16:43.383

Modified: 2026-05-15T19:57:38.640

Link: CVE-2026-43336

cve-icon Redhat

Severity :

Publid Date: 2026-05-08T00:00:00Z

Links: CVE-2026-43336 - Bugzilla