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{"bugzilla": {"description": "dhcpcd: dhcpcd: Local heap use-after-free vulnerability leads to denial of service.", "id": "2491845", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491845"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in dhcpcd. A heap use-after-free vulnerability in the control socket handling allows a local unprivileged attacker to trigger memory corruption. This occurs when privilege separation is disabled, enabling the attacker to send a privileged command to the control socket. Successful exploitation can lead to a denial of service."], "mitigation": {"lang": "en:us", "value": "Ensure that the `dhcpcd` service is configured to run with privilege separation enabled. If `dhcpcd` is running with privilege separation disabled (e.g., via `--disable-privsep`), re-enable it to prevent local unprivileged attackers from exploiting this vulnerability. If privilege separation cannot be enabled, restrict access to the system running `dhcpcd` or disable the `dhcpcd` service if it is not critical for network operations. If the `dhcpcd` service is reconfigured, a restart may be required for changes to take effect."}, "name": "CVE-2026-56117", "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": "2026-06-23T16:14:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56117\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56117\nhttps://github.com/NetworkConfiguration/dhcpcd/commit/78ea09ed1633a583dbcde6e7bab9df4639ec8a34\nhttps://www.vulncheck.com/advisories/dhcpcd-heap-use-after-free-via-control-socket-handling"], "threat_severity": "Moderate"}

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