CVE-2025-23261
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedNVIDIA Cumulus Linux and NVOS products contain a vulnerability, where hashed user passwords are not properly suppressed in log files, potentially disclosing information to unauthorized users.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceNVIDIA Cumulus Linux and NVOS products fail to properly filter or suppress hashed user passwords from being written to system log files. An attacker with log file access could obtain these hashed credentials and potentially crack them offline or use them in further attacks.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify if the system is NVIDIA Cumulus Linux or NVOSRun 'cat /etc/os-release' or 'hostnamectl' to check the operating system name and versionAffected if The system is running NVIDIA Cumulus Linux or NVOS
-
Locate system log filesCheck directories such as /var/log/, /var/log/syslog, /var/log/auth.log, or run 'ls -la /var/log/' to list available log filesAffected if Log files exist on the system
-
Search log files for password hash patternsUse grep to search log files for patterns like '$', '$1$', '$2$', '$5$', '$6$' (common hash prefixes) or look for 'password' and 'hash' keywords near each other: grep -r 'password.*\$' /var/log/ or grep -r '\$[0-9]\$[a-zA-Z0-9./]{,100}\$' /var/log/Affected if Log files contain strings matching password hash patterns (starting with $ followed by numbers and alphanumeric characters)
-
Check for password-related entries in authentication logsExamine /var/log/auth.log, /var/log/secure, or /var/log/messages for entries containing 'password', 'passwd', or 'shadow' that include hash-like stringsAffected if Authentication logs contain password hashes or shadow file fragments
-
Verify log file access controlsRun 'ls -la /var/log/' and check if log files have overly permissive permissions (world-readable)Affected if Log files are readable by non-privileged users (permissions show 'r--r--r--' or similar for others)
A system is affected if it runs NVIDIA Cumulus Linux or NVOS and any log files contain visible password hash patterns or shadow file content.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReview all log files for exposed password hashes, restrict log file access permissions to authorized personnel only, implement log sanitization to strip sensitive credential data before logging, and rotate affected user passwords as a precaution.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-23261 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-23261 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data