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.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:21400-1 advisory.

    This update for radvd fixes the following issue

     - CVE-2026-48715: crafted ICMPv6 Router Advertisement can lead to a stack-based buffer overflow     (bsc#1268641).

    Changes for radvd:

    - Update to version 2.21.
      * feat: RFC8319 support: Increase max AdvDefaultLifetime and MaxRtrAdvInterval.
      * feat: Add DHCPv6-PD preferred flag.
      * fix: improve file checks for procfs knobs.
      * feat: allow libc strlcpy.
      * fix: make libcheck fatal if missing with --with-check.
      * refactor: make drop_root_privileges reusable.
      * fix: support incoming jumbo packets.
      * Avoid libbsd header with libc strlcpy.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:3055-1 advisory.

    This update for radvd fixes the following issue

    - CVE-2026-48715: stack-based buffer overflow in the `radvdump` Route Information option parser when     processing crafted       ICMPv6 Router Advertisements (bsc#1268641).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1799 advisory.

    Stack Buffer Overflow in radvdump Route Information Option Parser

    NOTE: https://github.com/radvd-project/radvd/security/advisories/GHSA-52px-gh9p-m379 (CVE-2026-48715)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-48715)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
329302	openSUSE 16 Security Update : radvd (openSUSE-SU-2026:21400-1)	Nessus	SuSE Local Security Checks	Local	high
327304	SUSE SLED15 / SLES15 Security Update : radvd (SUSE-SU-2026:3055-1)	Nessus	SuSE Local Security Checks	Local	high
319828	Amazon Linux 2023 : radvd (ALAS2023-2026-1799)	Nessus	Amazon Linux Local Security Checks	Local	high
316792	Linux Distros Unpatched Vulnerability : CVE-2026-48715	Nessus	Misc.	Local	high

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