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CVE-2026-128885 Dbus: stack out-of-bounds write in dbus _dbus_poll() select() fallback when file descriptor exceeds fd_setsize

5.5 medium

Medium (5.5) in red hat red hat enterprise linux 10.

On this page
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

CVSS 3.1

5.5 medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA's assessment (SSVC)
Exploitation: PoC · Automatable: no · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-121 Stack-based Buffer Overflow
Published
Modified
Assigned by
redhat (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • red hat:red hat enterprise linux 10

References

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