Detections
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Echo: linux: security update to 6.1.170-1

high Tenable Cloud Security Plugin ID 462310

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: nft_set_pipapo: split gc
 into unlink and reclaim phase Yiming Qian reports Use-after-free in the pipapo set type: Under a large
 number of expired elements, commit-time GC can run for a very long time in a non-preemptible context,
 triggering soft lockup warnings and RCU stall reports (local denial of service). We must split GC in an
 unlink and a reclaim phase. We cannot queue elements for freeing until pointers have been swapped. Expired
 elements are still exposed to both the packet path and userspace dumpers via the live copy of the data
 structure. call_rcu() does not protect us: dump operations or element lookups starting after call_rcu has
 fired can still observe the free'd element, unless the commit phase has made enough progress to swap the
 clone and live pointers before any new reader has picked up the old version. This a similar approach as
 done recently for the rbtree backend in commit 35f83a75529a ("netfilter: nft_set_rbtree: don't gc elements
 on insert"). (CVE-2026-23351)

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-2026-23351

Plugin Details

Severity: High

ID: 462310

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 99.06

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-23351

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: 3/25/2026

Reference Information

CVE: CVE-2026-23351