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{"bugzilla": {"description": "dhcpcd: dhcpcd: Denial of Service via crafted DHCPv6 ADVERTISE message", "id": "2491822", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491822"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in dhcpcd. This vulnerability allows an unauthenticated attacker on the same network link to trigger a one-byte stack out-of-bounds write. By sending a specially crafted DHCPv6 ADVERTISE message with an oversized option, the attacker can corrupt adjacent stack memory. This can lead to a denial of service (DoS) in the affected system."], "name": "CVE-2026-56115", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "dhcpcd", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-06-23T16:08:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56115\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56115\nhttps://github.com/NetworkConfiguration/dhcpcd/commit/2f00c7bfc408b6582d331932dfa47829c4819029\nhttps://www.vulncheck.com/advisories/dhcpcd-stack-out-of-bounds-write-in-dhcp6-makemessage"], "threat_severity": "Moderate"}

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