Cyber Resilience

CVE-2026-43377

High

Published: 08 May 2026

Published
08 May 2026
Modified
15 May 2026
KEV Added
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Patch
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CVSS Score v3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0025 16.0th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-43377 is a high-severity an unspecified weakness vulnerability in Linux Linux Kernel. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Unsecured Credentials (T1552); ranked at the 16.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Don't log keys in SMB3 signing and encryption key generation When KSMBD_DEBUG_AUTH logging is enabled, generate_smb3signingkey() and generate_smb3encryptionkey() log the session, signing, encryption, and decryption key bytes. Remove the…

more

logs to avoid exposing credentials.

CWE(s)
NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1552 Unsecured Credentials Credential Access
Adversaries may search compromised systems to find and obtain insecurely stored credentials.
attack.mitre.org →
Why these techniques?

Vulnerability causes SMB3 session/signing/encryption keys to be written to logs when debug auth logging is enabled, directly enabling credential exposure via T1552 Unsecured Credentials.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

linux
linux kernel
7.0 · 5.15 — 6.1.167 · 6.2 — 6.6.130 · 6.7 — 6.12.78

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References