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Echo: linux: security update to 6.12.94-1

medium Tenable Self-Hosted Container Security Plugin ID 457127

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: netfilter: revalidate bridge ports
 ebt_redirect_tg() dereferences br_port_get_rcu() return without a NULL check, causing a kernel panic when
 the bridge port has been removed between the original hook invocation and an NFQUEUE reinject. A mere NULL
 check isn't sufficient, however. As sashiko review points out userspace can not only remove the port from
 the bridge, it could also place the device in a different virtual device, e.g. macvlan. If this happens,
 we must drop the packet, there is no way for us to reinject it into the bridge path. Switch to _upper API,
 we don't need the bridge port structure. Also, this fix keeps another bug intact: Both nfnetlink_log and
 nfnetlink_queue use CONFIG_BRIDGE_NETFILTER too aggressive, which prevents certain logging features when
 queueing in bridge family: NETFILTER_FAMILY_BRIDGE can be enabled while the old CONFIG_BRIDGE_NETFILTER
 cruft is off. Fixes tag is a common ancestor, this was always broken. (CVE-2026-53220)

Solution

Update the linux library and its related packages to version 6.12.94-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-53220

Plugin Details

Severity: Medium

ID: 457127

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.58

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2026-53220

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/25/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-53220