Ios XrOperating system · Cisco
CVE-2022-20714
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 vulnerability in the data plane microcode of Lightspeed-Plus line cards for Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause the line card to reset. This vulnerability is due to the incorrect handling of malformed packets that are received on the Lightspeed-Plus line cards. An attacker could exploit this vulnerability by sending a crafted IPv4 or IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the Lightspeed-Plus line card to reset, resulting in a denial of service (DoS) condition for any traffic that traverses that line card.
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 confidenceThis vulnerability exists in the data plane microcode of Cisco ASR 9000 Series Lightspeed-Plus line cards. The microcode fails to properly handle malformed IPv4 or IPv6 packets, causing the line card to reset when such packets are processed. An unauthenticated remote attacker can exploit this by sending crafted packets, resulting in denial of service.
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
Ios XrOperating system
all 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/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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Identify ASR 9000 Series hardwareInventory your network equipment and confirm you have Cisco ASR 9000 Series routers in your environmentAffected if You have ASR 9000 Series routers deployed in your network
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Confirm Lightspeed-Plus line card presenceOn the ASR 9000, use 'show inventory' or 'show module' command to identify installed line cards and check if they are Lightspeed-Plus typeAffected if Lightspeed-Plus line cards are installed in your ASR 9000
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Verify IOS XR versionUse 'show version' command on the router to confirm the IOS XR software version runningAffected if IOS XR is running on the affected platform (all versions are impacted)
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Review line card reset logsUse 'show logging' or 'show log' to examine system logs for line card reset events, particularly unexpected resets without clear causeAffected if You observe unexplained line card resets on Lightspeed-Plus cards
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Check for malformed packet indicatorsUse 'show interface' and 'show controller' commands to examine packet error counters and statistics on line card interfacesAffected if You see elevated packet error counters or malformed packet-related errors on interfaces
You are affected if you have Cisco ASR 9000 Series routers with Lightspeed-Plus line cards running IOS XR, as all versions of this combination are vulnerable to resets when processing malformed IPv4 or IPv6 packets.
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 Cisco-provided software/firmware update for Lightspeed-Plus line cards when available. In the interim, implement network-based filtering of obviously malformed packets at upstream segments to reduce exposure.
Fix this in Ios Xr
Scoped from the published advisory
- 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-2022-20714 — 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-2022-20714 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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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
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