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Echo: linux: security update to 6.12.85-1

medium Tenable Cloud Security Plugin ID 455312

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: mm/damon/sysfs: check contexts->nr
 before accessing contexts_arr[0] Multiple sysfs command paths dereference contexts_arr[0] without first
 verifying that kdamond->contexts->nr == 1. A user can set nr_contexts to 0 via sysfs while DAMON is
 running, causing NULL pointer dereferences. In more detail, the issue can be triggered by privileged users
 like below. First, start DAMON and make contexts directory empty (kdamond->contexts->nr == 0). # damo
 start # cd /sys/kernel/mm/damon/admin/kdamonds/0 # echo 0 > contexts/nr_contexts Then, each of below
 commands will cause the NULL pointer dereference. # echo update_schemes_stats > state # echo
 update_schemes_tried_regions > state # echo update_schemes_tried_bytes > state # echo
 update_schemes_effective_quotas > state # echo update_tuned_intervals > state Guard all commands (except
 OFF) at the entry point of damon_sysfs_handle_cmd(). (CVE-2026-31458)

Solution

Update the linux library and its related packages to version 6.12.85-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-31458

Plugin Details

Severity: Medium

ID: 455312

Version: Revision 1.2

Type: Local

Published: 10/1/2026

Updated: 10/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

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-2026-31458

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-2026-31458