VULNERABILITY INTELLIGENCE

CVE-2026-48715

CVSS score8.8 HIGH
EPSS probability0.33%
CISA KEVNot currently listed
Published2026-06-19
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-121

Primary references