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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-5265

No exploitation reported by the sources we read.

  • Published2026-04-24
  • WeaknessCWE-130

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.

Timeline

dates in UTC
  1. 2026-04-2413:16CVE publishedNVD

Versions per branch

Products declared by the CNA27 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

21 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-06-17

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openvswitchSUSE:Linux Micro 6.2all versions · fixed in 3.5.4-160000.4.1
  • openvswitchSUSE:Linux Micro 6.1all versions · fixed in 3.1.7-slfo.1.1_4.1
  • openvswitchSUSE:Linux Micro 6.0all versions · fixed in 3.1.7-6.1
  • openvswitchSUSE:Linux Enterprise Server for SAP applications 16.0all versions · fixed in 3.5.4-160000.4.1
  • openvswitchSUSE:Linux Enterprise Server for SAP Applications 15 SP6all versions · fixed in 3.1.7-150600.33.15.1
  • openvswitchSUSE:Linux Enterprise Server for SAP Applications 15 SP5all versions · fixed in 2.14.2-150400.24.35.1
  • openvswitchSUSE:Linux Enterprise Server for SAP Applications 15 SP4all versions · fixed in 2.14.2-150400.24.35.1
  • openvswitchSUSE:Linux Enterprise Server 16.0all versions · fixed in 3.5.4-160000.4.1

31 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
2026-04-24
Last Modified
2026-10-26
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-whr7-6788-jg2p

Frequently asked questions

What is CVE-2026-5265?

When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.

Is CVE-2026-5265 actively exploited?

Active exploitation of CVE-2026-5265 has not been confirmed. Its EPSS score was 0.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-5265?

CVE-2026-5265 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H.

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