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VULNERABILITIES

CVE-2026-5265 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://www.openwall.com/lists/oss-security/2026/04/20/2 CVE
http://www.openwall.com/lists/oss-security/2026/04/20/4 CVE
https://access.redhat.com/errata/RHSA-2026:11694 [email protected]
https://access.redhat.com/errata/RHSA-2026:11695 [email protected]
https://access.redhat.com/errata/RHSA-2026:11696 [email protected]

see all 13 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-130Improper Handling of Length Parameter Inconsistency[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-5265
NVD Published Date:
Apr 24, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-5265 Details - Not Deferred