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Vulnerability record · CVE-2026-48715 · published 19 June 2026

CVE-2026-48715: Radvd.litech radvd stack-based buffer overflow vulnerability

RRadvd.Litech · Radvd

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.

7.7 CVSS 4.0 High EPSS 0.33% · top 75.9% CWE-121 · Stack-based buffer overflow
7.7CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
26 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/radvd-project/radvd/commit/068bde13e3fd6a5fcdb6859e6a2acd293a325dc5 Patch
https://github.com/radvd-project/radvd/security/advisories/GHSA-52px-gh9p-m379 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-48715), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.