What’s Vulnerable › Vulnerabilities

CVE-2026-23303: smb: client: Don't log plaintext credentials in cifs_set_cifscreds

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-25 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: Don't log plaintext credentials in cifs_set_cifscreds When debug logging is enabled, cifs_set_cifscreds() logs the key payload and exposes the plaintext username and password. Remove the debug log to avoid exposing credentials.

Affected products

• Linux kernel: from 3.3.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17 — fixed in 5.10.253, 5.15.203, 6.1.167, 6.12.77, 6.18.17, 6.19.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.253, 5.15.203, 6.1.167, 6.12.77. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2ef0fc3bf49db2b9df36d5f44508c9e384bfa2a1
• https://git.kernel.org/stable/c/2f37dc436d4e61ff7ae0b0353cf91b8c10396e4d
• https://git.kernel.org/stable/c/3990f352bb0adc8688d0949a9c13e3110570eb61
• https://git.kernel.org/stable/c/3e182701db612ddd794ccd5ed822e6cc1db2b972
• https://git.kernel.org/stable/c/54c570de9a35860dfa85fe668f23ddfda8cc7e26
• https://git.kernel.org/stable/c/b746a357abfb8fdb0a171d51ec5091e786d34be1
• https://git.kernel.org/stable/c/e5a3b11e07b335006371915b2da47b6056c9e3bc
• https://git.kernel.org/stable/c/ff0ece8ed04180c52167c003362284b23cf54e8d
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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