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Echo: linux: security update to 6.1.170-1

medium Tenable Cloud Security Plugin ID 463550

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: ctnetlink: use netlink
 policy range checks Replace manual range and mask validations with netlink policy annotations in ctnetlink
 code paths, so that the netlink core rejects invalid values early and can generate extack errors. -
 CTA_PROTOINFO_TCP_STATE: reject values > TCP_CONNTRACK_SYN_SENT2 at policy level, removing the manual >=
 TCP_CONNTRACK_MAX check. - CTA_PROTOINFO_TCP_WSCALE_ORIGINAL/REPLY: reject values > TCP_MAX_WSCALE (14).
 The normal TCP option parsing path already clamps to this value, but the ctnetlink path accepted 0-255,
 causing undefined behavior when used as a u32 shift count. - CTA_FILTER_ORIG_FLAGS/REPLY_FLAGS: use
 NLA_POLICY_MASK with CTA_FILTER_F_ALL, removing the manual mask checks. - CTA_EXPECT_FLAGS: use
 NLA_POLICY_MASK with NF_CT_EXPECT_MASK, adding a new mask define grouping all valid expect flags.
 Extracted from a broader nf-next patch by Florian Westphal, scoped to ctnetlink for the fixes tree.
 (CVE-2026-31495)

Solution

Update the linux library and its related packages to version 6.1.170-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-31495

Plugin Details

Severity: Medium

ID: 463550

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

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-2026-31495

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: 5/1/2026

Vulnerability Publication Date: 4/22/2026

Reference Information

CVE: CVE-2026-31495