{"affected":[{"defaultStatus":"unknown","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"dbus","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-128886","cwes":["CWE-1322"],"description":"A flaw was found in dbus when configured with the nonce-tcp transport. An unauthenticated attacker able to connect to an exposed listener can cause a Denial of Service (DoS) by opening a connection and withholding the expected authentication token. Because the server processes this verification without enforcing a timeout, the stalled connection blocks the accept process and prevents legitimate clients from establishing new connections.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.2,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":6.2,"severity":"medium","source":"NVD: secalert@redhat.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794608243767,"publishedAt":1794606140482,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-128886"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2472930"},{"source":"secalert@redhat.com","tags":[],"url":"https://access.redhat.com/security/cve/CVE-2026-128886"},{"source":"secalert@redhat.com","tags":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2472930"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Disable non-standard `nonce-tcp` listeners in the D-Bus configuration in favor of standard UNIX domain sockets. If network reachability is required, restrict access to trusted hosts using `firewalld`.\n\nTo remove an exposed port from an untrusted firewall zone:\n\n```\nfirewall-cmd --permanent --zone=public --remove-port=<PORT>/tcp\nfirewall-cmd --permanent --zone=trusted --add-source=<TRUSTED_IP_OR_SUBNET>\nfirewall-cmd --reload\n```\n\nCaveats:\nRestricting or disabling network listeners prevents remote clients outside the trusted subnet from connecting to the affected bus.\n\nWarning:\nReloading the firewall rules or altering the D-Bus server configuration requires restarting the affected D-Bus service, which will drop existing connections and temporarily disrupt communications."}],"revision":"b2b2ad7ee661ab4b99a7d59616f4efbf043bbeceef4d4d91867779c3d7efa2ae","sources":[{"modifiedAt":1794606140482,"name":"CNA: redhat","retrievedAt":1794607770217,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128886"},{"modifiedAt":1794608243767,"name":"NVD","retrievedAt":1794615616738,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128886"}],"ssvc":null,"status":"published","title":"Dbus: server accept watch can be stalled by blocking nonce-tcp accept_with_noncefile path","updatedAt":1794615616738}