Description
A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openvswitch | No fix yet | — |
| Debian 13 | openvswitch | No fix yet | — |
| Debian 12 | openvswitch | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | openvswitch | No fix yet | — |
| Ubuntu 26.04 LTS | openvswitch | No fix yet | — |
| Ubuntu 25.10 | openvswitch | No fix yet | — |
| Ubuntu 24.04 LTS | openvswitch | No fix yet | — |
| Ubuntu 22.04 LTS | openvswitch | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | openvswitch | No fix yet | — |
| Ubuntu Pro 18.04 LTS | openvswitch | No fix yet | — |
| Ubuntu Pro 16.04 LTS | openvswitch | No fix yet | — |