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CVE-2026-123876 Details

Description

A flaw was found in the default seccomp profile used by Podman via containers-common. Deny rules for AF_VSOCK and NETLINK_AUDIT compared socket arguments with unmasked 64-bit equality. Because the kernel truncates those int arguments to 32 bits, setting upper bits can bypass the deny rules.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.4 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://access.redhat.com/security/cve/CVE-2026-123876	[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2566536	[email protected]
https://github.com/podman-container-tools/container-libs/issues/1248	[email protected]
https://github.com/podman-container-tools/container-libs/pull/1249	[email protected]
https://www.openwall.com/lists/oss-security/2026/10/27/3	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-184	Incomplete List of Disallowed Inputs	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 6, 2026	CVE Modified	[email protected]
Nov 6, 2026	New CVE Received	[email protected]