Echo: linux: security update to 6.1.170-1

high Tenable Cloud Security Plugin ID 462657

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: NFSD: Hold net reference for the
lifetime of /proc/fs/nfs/exports fd The /proc/fs/nfs/exports proc entry is created at module init and
persists for the module's lifetime. exports_proc_open() captures the caller's current network namespace
and stores its svc_export_cache in seq->private, but takes no reference on the namespace. If the namespace
is subsequently torn down (e.g. container destruction after the opener does setns() to a different
namespace), nfsd_net_exit() calls nfsd_export_shutdown() which frees the cache. Subsequent reads on the
still-open fd dereference the freed cache_detail, walking a freed hash table. Hold a reference on the
struct net for the lifetime of the open file descriptor. This prevents nfsd_net_exit() from running -- and
thus prevents nfsd_export_shutdown() from freeing the cache -- while any exports fd is open. cache_detail
already stores its net pointer (cd->net, set by cache_create_net()), so exports_release() can retrieve it
without additional per-file storage. (CVE-2026-31403)

Solution

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

Plugin Details

Severity: High

ID: 462657

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.92

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-2026-31403

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: 4/3/2026

Reference Information

CVE: CVE-2026-31403

Detections

Analytics