Medium severity6.5NVD Advisory· Published Jun 23, 2026· Updated Jul 14, 2026
CVE-2026-56116
CVE-2026-56116
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.
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Affected products
4- Range: <=10.3.2
- osv-coords2 versionspkg:rpm/opensuse/dhcpcd&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/dhcpcd&distro=openSUSE%20Leap%2016.0
< 10.5.0-1.1+ 1 more
- (no CPE)range: < 10.5.0-1.1
- (no CPE)range: < 10.5.0-160000.1.1
Patches
Vulnerability mechanics
References
2News mentions
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