Enterprise LinuxOperating system · Redhat
CVE-2026-57965
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 · uneditedA flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This issue requires the SPICE host to be untrusted or compromised for exploitation.
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 confidenceA vulnerability in spice-vdagent allows a malicious or compromised SPICE host to trigger an integer overflow by sending a specially crafted message. This integer overflow leads to a heap buffer overflow, causing the spice-vdagent daemon to crash and resulting in denial of service for the virtual machine.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Enterprise LinuxOperating system
= 6.0= 7.0= 8.0= 9.0= 10.0all versionsCVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/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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Check if spice-vdagent is installedOn RHEL-based systems: rpm -qa | grep -i vdagent. On Debian-based: dpkg -l | grep -i vdagentAffected if Package is present on the system
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Identify the installed versionrpm -q spice-vdagent (RHEL) or dpkg -s spice-vdagent (Debian) to see version stringAffected if Version matches any of RHEL 6.0, 7.0, 8.0, 9.0, 10.0 or is any version for 'Spice Space Spice Vdagent'
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Verify the spice-vdagent service is runningsystemctl status spice-vdagentd or ps aux | grep -i vdagentAffected if Service process is active and accepting SPICE guest agent connections
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Confirm SPICE guest agent support is enabled in the VMCheck for /var/spice/spice-vdagentd/sock socket file, or look for vdagent channel in libvirt XML config: virsh dumpxml <vmname> | grep -i vdagentAffected if SPICE vdagent channel is configured and active in the virtual machine
If spice-vdagent is installed and the SPICE guest agent channel is enabled/active, the environment is affected since all versions of this component are vulnerable to the heap buffer overflow.
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 vendor patches for spice-vdagent to fix the integer overflow in message handling; ensure SPICE connections only from trusted hosts.
Fix this in Enterprise Linux
Scoped from the published advisory
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57965 — 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-2026-57965 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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