CVE-2026-43377ksmbd: Don't log keys in SMB3 signing and encryption key generation
- 8.1HighCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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 logs to avoid exposing credentials.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 4084ed720d7d5f4e975c9e4a6267a552dad3b24a
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < fec5c70b82af3f59f15bb984df94e5ad1fccfb1e
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 3fe2d9ec166b7df9a8df6c0fdcfc210572e27e3f
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 407cc37c21d51f9b9d4d20204b04890880cfa6ae
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < c6b01b997a2094969e315f1ebfc1d64b8ae2163d
- affected e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 – < 441336115df26b966575de56daf7107ed474faed
- affected 5.15
- unaffected < 5.15
- unaffected 6.1.167 – ≤ 6.1.*
- unaffected 6.6.130 – ≤ 6.6.*
- unaffected 6.12.78 – ≤ 6.12.*
- unaffected 6.18.20 – ≤ 6.18.*
- unaffected 6.19.9 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References6
- https://git.kernel.org/stable/c/4084ed720d7d5f4e975c9e4a6267a552dad3b24a (opens in a new tab)
- https://git.kernel.org/stable/c/fec5c70b82af3f59f15bb984df94e5ad1fccfb1e (opens in a new tab)
- https://git.kernel.org/stable/c/3fe2d9ec166b7df9a8df6c0fdcfc210572e27e3f (opens in a new tab)
- https://git.kernel.org/stable/c/407cc37c21d51f9b9d4d20204b04890880cfa6ae (opens in a new tab)
- https://git.kernel.org/stable/c/c6b01b997a2094969e315f1ebfc1d64b8ae2163d (opens in a new tab)
- https://git.kernel.org/stable/c/441336115df26b966575de56daf7107ed474faed (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-28683 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-43377)Record last updated .