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Echo: linux: security update to 6.1.176-1

high Tenable Cloud Security Plugin ID 457096

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: nfnetlink_osf: fix
 potential NULL dereference in ttl check The nf_osf_ttl() function accessed skb->dev to perform a local
 interface address lookup without verifying that the device pointer was valid. Additionally, the
 implementation utilized an in_dev_for_each_ifa_rcu loop to match the packet source address against local
 interface addresses. It assumed that packets from the same subnet should not see a decrement on the
 initial TTL. A packet might appear it is from the same subnet but it actually isn't especially in modern
 environments with containers and virtual switching. Remove the device dereference and interface loop.
 Replace the logic with a switch statement that evaluates the TTL according to the ttl_check.
 (CVE-2026-52998)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-52998

Plugin Details

Severity: High

ID: 457096

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.7

Percentile: 96.04

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-52998

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 6/3/2026

Reference Information

CVE: CVE-2026-52998