CVE-2025-68284
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 · uneditedIn the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds writes in handle_auth_session_key() The len field originates from untrusted network packets. Boundary checks have been added to prevent potential out-of-bounds writes when decrypting the connection secret or processing service tickets. [ idryomov: changelog ]
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 · high confidenceOut-of-bounds write vulnerability in libceph's handle_auth_session_key() function where the len field from untrusted network packets is used without proper boundary validation during decryption of connection secrets or processing of service tickets, allowing memory corruption.
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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
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Determine if the Ceph kernel module is loadedRun 'lsmod | grep ceph' or check /sys/module/ceph/ to see if the ceph kernel module is currently loaded in memoryAffected if The ceph module is loaded and the system uses Ceph client functionality
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Check the running Linux kernel versionRun 'uname -r' to get the kernel version and compare it to the version that includes the boundary check fix in handle_auth_session_key()Affected if The kernel version predates the fix and the ceph module is in use
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Verify if libceph is in use by the systemCheck for ceph-related network connections or config with 'cat /etc/ceph/ceph.conf' (if exists) or check for ceph mount activity with 'mount | grep ceph' or 'cat /proc/mounts'Affected if The system actively uses Ceph and the kernel is unpatched
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Check for any crash logs or kernel messages related to libcephReview dmesg output or /var/log/kern.log for any out-of-bounds memory errors, buffer overflow warnings, or ceph authentication failures using 'dmesg | grep -i ceph'Affected if Error messages indicate memory corruption in the libceph auth path
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Inspect the kernel symbol for handle_auth_session_keyUse 'grep handle_auth_session_key /proc/kallsyms' (if accessible) to verify the function address; a patched kernel will have the boundary-checked versionAffected if The symbol exists and the kernel version is older than the fixed release
The environment is affected if the Ceph kernel module is loaded and the running kernel version predates the fix for the len field validation in handle_auth_session_key within libceph.
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 dataApply the kernel patch containing boundary checks for the len field; for unpatched systems, consider network-level restrictions on Ceph client traffic or temporary service disruption until patching can be completed.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $3,088.
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Free · runs locallyCheck whether your project pulls in CVE-2025-68284 — 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-2025-68284 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
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- Version or environment caveats, and links to real fixes
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