CVE-2026-128886 (GCVE-0-2026-128886)
Vulnerability from cvelistv5 – Published: 2026-11-13 21:42 – Updated: 2026-11-13 21:42- CWE-1322 - Use of Blocking Code in Single-threaded, Non-blocking Context
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-128886 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2472930 | issue-trackingx_refsource_REDHAT |
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/a:redhat:enterprise_linux:10
|
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"packageName": "dbus",
"product": "Red Hat Enterprise Linux 10",
"vendor": "Red Hat"
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"datePublic": "2026-08-19T16:20:17.572Z",
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"value": "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."
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"attackVector": "LOCAL",
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"baseScore": 6.2,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"url": "https://access.redhat.com/security/cve/CVE-2026-128886"
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"tags": [
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"lang": "en",
"time": "2026-05-11T20:27:44.000Z",
"value": "Reported to Red Hat."
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"time": "2026-08-19T16:20:17.572Z",
"value": "Made public."
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"title": "Dbus: server accept watch can be stalled by blocking nonce-tcp accept_with_noncefile path",
"workarounds": [
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"lang": "en",
"value": "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=\u003cPORT\u003e/tcp\nfirewall-cmd --permanent --zone=trusted --add-source=\u003cTRUSTED_IP_OR_SUBNET\u003e\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."
}
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"x_generator": {
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"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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"cveId": "CVE-2026-128886",
"datePublished": "2026-11-13T21:42:20.482Z",
"dateReserved": "2026-11-13T11:51:37.809Z",
"dateUpdated": "2026-11-13T21:42:20.482Z",
"state": "PUBLISHED"
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"current_release_date": "2026-11-13T21:42:09+00:00",
"cve": "CVE-2026-128886",
"id": "CVE-2026-128886",
"initial_release_date": "2026-08-19T16:20:17.572649+00:00",
"product_status:under_investigation": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "dbus: Server accept watch can be stalled by blocking nonce-tcp accept_with_noncefile path",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-128886.json",
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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