VulnerabilityPublished 25 Mar 2026Updated 5 Nov 2026

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

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ff0ece8ed04180c52167c003362284b23cf54e8d : update Linux kernel when convenient.

Data as of 5 Nov 2026, 22:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in ff0ece8ed04180c52167c003362284b23cf54e8d, e5a3b11e07b335006371915b2da47b6056c9e3bc, b746a357abfb8fdb0a171d51ec5091e786d34be1 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < ff0ece8ed04180c52167c003362284b23cf54e8d	Fixed in ff0ece8ed04180c52167c003362284b23cf54e8d
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < e5a3b11e07b335006371915b2da47b6056c9e3bc	Fixed in e5a3b11e07b335006371915b2da47b6056c9e3bc
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < b746a357abfb8fdb0a171d51ec5091e786d34be1	Fixed in b746a357abfb8fdb0a171d51ec5091e786d34be1
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < 3990f352bb0adc8688d0949a9c13e3110570eb61	Fixed in 3990f352bb0adc8688d0949a9c13e3110570eb61
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < 54c570de9a35860dfa85fe668f23ddfda8cc7e26	Fixed in 54c570de9a35860dfa85fe668f23ddfda8cc7e26
LinuxLinux	Affected ≥ 8a8798a5ff90977d6459ce1d657cf8fe13a51e97, < 3e182701db612ddd794ccd5ed822e6cc1db2b972	Fixed in 3e182701db612ddd794ccd5ed822e6cc1db2b972

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.

References

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