Sensitive Information in Resource Not Removed Before Reuse in Linux kernel - CVE-2026-43336
Published: May 9, 2026
Vulnerability identifier: #VU130846
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43336
CWE-ID: CWE-226
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to missing zeroization of sensitive data in the ChaCha implementation in lib/crypto/chacha when processing cryptographic state on the stack. A local user can read residual stack memory to disclose sensitive information.
The permuted state is sufficient to reconstruct the original state, including the key.
How to mitigate CVE-2026-43336
Install security update from vendor's repository.
Sources
- 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