{"id":"CVE-2026-128885","aliases":["EUVD-2026-125773","GHSA-pxqc-xvxp-qg3h"],"status":"published","title":"Dbus: stack out-of-bounds write in dbus _dbus_poll() select() fallback when file descriptor exceeds fd_setsize","description":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select() mechanism for event monitoring, it does not verify whether file descriptor numbers exceed allocated limits. A local attacker can exploit this flaw by opening a large number of concurrent connections to trigger an out-of-bounds write on the stack. This can cause the daemon to crash, resulting in a Denial of Service (DoS).","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-11-13T21:06:46Z","modified":"2026-11-13T22:17:23Z","products":[{"vendor":"red hat","product":"red hat enterprise linux 10"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-128885","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2462795","tags":["issue-tracking","x_refsource_REDHAT","exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128885"},{"url":"https://github.com/advisories/GHSA-pxqc-xvxp-qg3h"}],"sources":{"cve":[{"id":"CVE-2026-128885","title":"Dbus: stack out-of-bounds write in dbus _dbus_poll() select() fallback when file descriptor exceeds fd_setsize","description":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select() mechanism for event monitoring, it does not verify whether file descriptor numbers exceed allocated limits. A local attacker can exploit this flaw by opening a large number of concurrent connections to trigger an out-of-bounds write on the stack. This can cause the daemon to crash, resulting in a Denial of Service (DoS).","status":"published","published":"2026-11-13T21:06:46.45Z","modified":"2026-11-13T21:19:18.067Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-13T22:36:58.333409Z"}],"euvd":[{"id":"EUVD-2026-125773","description":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select() mechanism for event monitoring, it does not verify whether file descriptor numbers exceed allocated limits. A local attacker can exploit this flaw by opening a large number of concurrent connections to trigger an out-of-bounds write on the stack. This can cause the daemon to crash, resulting in a Denial of Service (DoS).","status":"published","published":"2026-11-13T21:06:46Z","modified":"2026-11-13T21:19:18Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-13T23:41:01.258782Z"}],"ghsa":[{"id":"GHSA-pxqc-xvxp-qg3h","title":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select...","description":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select() mechanism for event monitoring, it does not verify whether file descriptor numbers exceed allocated limits. A local attacker can exploit this flaw by opening a large number of concurrent connections to trigger an out-of-bounds write on the stack. This can cause the daemon to crash, resulting in a Denial of Service (DoS).","status":"published","published":"2026-11-13T21:32:01Z","modified":"2026-11-13T21:32:08Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-121"],"updated_at":"2026-11-13T21:53:56.324277Z"}],"nvd":[{"id":"CVE-2026-128885","description":"A flaw was found in D-Bus. In configurations where the daemon falls back to using the Unix select() mechanism for event monitoring, it does not verify whether file descriptor numbers exceed allocated limits. A local attacker can exploit this flaw by opening a large number of concurrent connections to trigger an out-of-bounds write on the stack. This can cause the daemon to crash, resulting in a Denial of Service (DoS).","status":"published","published":"2026-11-13T21:17:45.827Z","modified":"2026-11-13T22:17:23.543Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-13T23:38:08.103555Z"}]}}