CVE-2026-5265
Medium · 6.5CVSS
6.5
EPSS
0.7%
Published
Apr 24, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | openvswitch | 0 | 3.5.4-160000.4.1 |
| openSUSE:Tumbleweed | openvswitch | 0 | 3.7.1-34.1 |
Related vulnerabilities
- CVE-2026-34956 A flaw was found in Open vSwitch. Also affects openvswitch
- CVE-2026-5367 A flaw was found in OVN (Open Virtual Network). Also affects openvswitch
- CVE-2025-0650 A flaw was found in the Open Virtual Network (OVN). Also affects openvswitch
- CVE-2023-3966 A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve… Also affects openvswitch
- CVE-2023-5366 A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets… Also affects openvswitch
- CVE-2026-15418 In the silabser.sys driver for CP210x devices v11.5.0 and earlier, a local unprivileged… CWE-130
- CVE-2026-5706 In Bluetooth Mesh SDK 6.1.4 and earlier, malformed extended advertisements can trigger… CWE-130
- CVE-2026-71402 An out-of-bounds read was found in the DHCPv4 packet capture code of wicked. CWE-130