radvdump's Route Information Option Parser has a Stack Buffer Overflow
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
radvd is a router advertisement daemon for IPv6. Prior to version 2.21, the `radvdump` utility shipped with radvd contains a stack buffer overflow in the Route Information option parser. When processing a crafted ICMPv6 Router Advertisement, `print_ff()` copies up to 2032 bytes from attacker-controlled packet data into a 16-byte `struct in6_addr` on the stack, overflowing by up to 2016 bytes. Note that the main `radvd` daemon is not affected by the vulnerability. Version 2.21 patches the issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| radvd-project | radvdump | before 2.21 | 2.21 | Patch available | CNA |
- radvdump Vendorradvd-project Affected before 2.21 Fixed in 2.21 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:radvd.litech:radvd:*:*:*:*:*:*:*:* | before 2.21 | Vulnerable | Radvd.litech |
- cpe:2.3:a:radvd.litech:radvd:*:*:*:*:*:*:*:* Versions before 2.21 Vulnerable ·Radvd.litech
Remediation
- Fix · CNA radvdump (radvd-project) Fixed in 2.21
Timeline
- 2026-10-02 Threatist record created from CVE-2026-48715
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences