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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 22 Jun 2026 14:30:00 +0000
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ssvc
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Sun, 21 Jun 2026 09:45:00 +0000
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| First Time appeared |
Radvd-project
Radvd-project radvdump |
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| Vendors & Products |
Radvd-project
Radvd-project radvdump |
Fri, 19 Jun 2026 20:00:00 +0000
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| 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. | |
| Title | radvdump's Route Information Option Parser has a Stack Buffer Overflow | |
| Weaknesses | CWE-121 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-22T13:57:45.067Z
Reserved: 2026-05-22T18:47:27.755Z
Link: CVE-2026-48715
Updated: 2026-06-22T13:57:38.966Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-20T22:34:34Z
Weaknesses