SB2026050954 - Sensitive Information in Resource Not Removed Before Reuse in Linux kernel crypto

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Main Vulnerability Database SB2026050954

SB2026050954 - Sensitive Information in Resource Not Removed Before Reuse in Linux kernel crypto

Published: May 9, 2026

Security Bulletin ID SB2026050954
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Sensitive Information in Resource Not Removed Before Reuse (CVE-ID: CVE-2026-43336)

CWE-ID: CWE-226 - Sensitive Information in Resource Not Removed Before Reuse

CVSSv4: 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


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.


Remediation

Install update from vendor's website.

References