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Stack-based Buffer Overflow Affecting radvd-debuginfo package, versions <0:2.19-2.amzn2023.0.3

Severity

 Recommended
high

Based on Amazon Linux security rating.

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  • Snyk IDSNYK-AMZN2023-RADVDDEBUGINFO-17290993
  • published10 Jun 2026
  • disclosed19 Jun 2026
Report a new vulnerability Found a mistake?

Introduced: 10 Jun 2026

NewCVE-2026-48715  (opens in a new tab)
CWE-121  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 radvd-debuginfo to version 0:2.19-2.amzn2023.0.3 or higher.
This issue was patched in ALAS2023-2026-1799.

NVD Description

Note: Versions mentioned in the description apply only to the upstream radvd-debuginfo package and not the radvd-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.