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CVE-2026-123876

Red Hat Enterprise Linux 10 · Vulnerability

CVSS 3.1 4.4 MEDIUMCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 6 Nov 2026 19:02:40 UTC. Read the latest advisory.

cve-program · CVE-2026-123876

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-123876

Published

Podman: containers-common: containers-common: default seccomp af_vsock/netlink_audit deny rules bypassable via 32-bit truncation

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.

Source published
6 Nov 2026 17:38:41 UTC
Source modified
6 Nov 2026 17:38:41 UTC
Saved here
6 Nov 2026 19:02:40 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

ChangeIntel

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Sources read 15 Nov 19:06 UTC · 254 of 275 readable · 250 fully read · documentation 468/469 current

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