What is CVE-2026-123876?

CVE-2026-123876 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Incomplete List of Disallowed Inputs. CVSS score: 4.4/10. Published 2026-11-06.

How severe is CVE-2026-123876?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-123876

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.

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

Frequently asked questions

What is CVE-2026-123876?: CVE-2026-123876 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Incomplete List of Disallowed Inputs. CVSS score: 4.4/10. Published 2026-11-06.
How severe is CVE-2026-123876?: Medium severity. CVSS v3 base score is 4.4 out of 10.