CVE-2026-43377 - Vulnerability Analysis
HighCVSS: 8.1Last Updated: May 11, 2026
Linux kernel - Information Disclosure
Published: May 8, 2026Updated: May 11, 2026Remote Exploitable
Overview
Linux kernel contains an information disclosure vulnerability caused by logging SMB3 signing and encryption keys in ksmbd when KSMBD_DEBUG_AUTH is enabled, letting attackers access sensitive key material, exploit requires debug logging enabled.
Severity & Score
Severity: High
CVSS Score: 8.1
Impact
Attackers can obtain sensitive SMB3 keys, leading to credential exposure and potential session compromise.
Mitigation
Disable KSMBD_DEBUG_AUTH logging or update to a version with the fix removing key logging.
References
- https://git.kernel.org/stable/c/3fe2d9ec166b7df9a8df6c0fdcfc210572e27e3f
- https://git.kernel.org/stable/c/407cc37c21d51f9b9d4d20204b04890880cfa6ae
- https://git.kernel.org/stable/c/4084ed720d7d5f4e975c9e4a6267a552dad3b24a
- https://git.kernel.org/stable/c/441336115df26b966575de56daf7107ed474faed
- https://git.kernel.org/stable/c/c6b01b997a2094969e315f1ebfc1d64b8ae2163d
- https://git.kernel.org/stable/c/fec5c70b82af3f59f15bb984df94e5ad1fccfb1e
Related Resources
Details
- CVE ID
- CVE-2026-43377
- Severity
- High
- CVSS Score
- 8.1
- Type
- information_disclosure
- Status
- new
CVSS Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N