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Echo: linux: security update to 6.1.170-1

high Tenable Self-Hosted Container Security Plugin ID 462825

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: ext4: fix use-after-free in
 update_super_work when racing with umount Commit b98535d09179 ("ext4: fix bug_on in start_this_handle
 during umount filesystem") moved ext4_unregister_sysfs() before flushing s_sb_upd_work to prevent new
 error work from being queued via /proc/fs/ext4/xx/mb_groups reads during unmount. However, this introduced
 a use-after-free because update_super_work calls ext4_notify_error_sysfs() -> sysfs_notify() which
 accesses the kobject's kernfs_node after it has been freed by kobject_del() in ext4_unregister_sysfs():
 update_super_work ext4_put_super ----------------- -------------- ext4_unregister_sysfs(sb)
 kobject_del(&sbi->s_kobj) __kobject_del() sysfs_remove_dir() kobj->sd = NULL sysfs_put(sd) kernfs_put() //
 RCU free ext4_notify_error_sysfs(sbi) sysfs_notify(&sbi->s_kobj) kn = kobj->sd // stale pointer
 kernfs_get(kn) // UAF on freed kernfs_node ext4_journal_destroy() flush_work(&sbi->s_sb_upd_work) Instead
 of reordering the teardown sequence, fix this by making ext4_notify_error_sysfs() detect that sysfs has
 already been torn down by checking s_kobj.state_in_sysfs, and skipping the sysfs_notify() call in that
 case. A dedicated mutex (s_error_notify_mutex) serializes ext4_notify_error_sysfs() against kobject_del()
 in ext4_unregister_sysfs() to prevent TOCTOU races where the kobject could be deleted between the
 state_in_sysfs check and the sysfs_notify() call. (CVE-2026-31446)

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-2026-31446

Plugin Details

Severity: High

ID: 462825

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-31446

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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: 4/22/2026

Reference Information

CVE: CVE-2026-31446