Description
The process_rs function in the router advertisement daemon (radvd) before 1.8.2, when UnicastOnly is enabled, allows remote attackers to cause a denial of service (temporary service hang) via a large number of ND_ROUTER_SOLICIT requests.
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 | radvd | 1:1.8-1.1 | — |
| Debian 13 | radvd | 1:1.8-1.1 | — |
| Debian 12 | radvd | 1:1.8-1.1 | — |
| Debian 6.0 | radvd | 1:1.6-1.1 | DSA-2323-1 |
| Debian 5.0 | radvd | 1:1.1-3.1 | DSA-2323-1 |
Advisories 1
- DSA-2323-1 radvd - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20111007 radvd 1.8.2 released with security fixes mailing-list
- DSA-2323 vendor-advisory
- http://www.litech.org/radvd/CHANGES
- USN-1257-1 vendor-advisory