dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash.
Metrics
Affected Vendors & Products
References
History
Tue, 23 Jun 2026 21:30:00 +0000
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Networkconfiguration
Networkconfiguration dhcpcd |
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| Vendors & Products |
Networkconfiguration
Networkconfiguration dhcpcd |
Tue, 23 Jun 2026 17:30:00 +0000
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| Metrics |
ssvc
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Tue, 23 Jun 2026 16:45:00 +0000
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| Description | dhcpcd through 10.3.2, fixed in commit 708b4a5, contains a memory leak vulnerability in the IPv6 Router Advertisement route information handling that allows an unauthenticated same-link attacker to cause denial of service by sending crafted Router Advertisements. Attackers can repeatedly send Router Advertisements containing Route Information options with a lifetime of zero, triggering unfreed allocations in routeinfo_findalloc() that cause linear memory exhaustion and eventual daemon crash. | |
| Title | dhcpcd Memory Leak DoS via IPv6 Router Advertisement Handling | |
| Weaknesses | CWE-401 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-06-23T17:03:00.129Z
Reserved: 2026-06-18T19:15:10.651Z
Link: CVE-2026-56116
Updated: 2026-06-23T17:00:16.988Z
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OpenCVE Enrichment
Updated: 2026-06-23T21:02:46Z