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Echo: linux: security update to 6.1.180-1

medium Tenable Self-Hosted Container Security Plugin ID 459233

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/shrinker: do not hold RCU lock in
 shrinker_debugfs_count_show() Reading the debugfs "count" file of a memcg-aware shrinker can sleep inside
 an RCU read-side critical section: BUG: sleeping function called from invalid context at
 kernel/cgroup/rstat.c:421 RCU nest depth: 1, expected: 0 css_rstat_flush mem_cgroup_flush_stats
 zswap_shrinker_count shrinker_debugfs_count_show shrinker_debugfs_count_show() invokes the
 ->count_objects() callback under rcu_read_lock(). The zswap callback flushes memcg stats via
 css_rstat_flush(), which may sleep, so it must not run under RCU. The RCU lock is not needed here.
 mem_cgroup_iter() takes RCU internally and returns a memcg holding a css reference (dropped on the next
 iteration or by mem_cgroup_iter_break()), so the memcg stays alive without it. The shrinker is kept alive
 by the open debugfs file: shrinker_free() removes the debugfs entries via debugfs_remove_recursive(),
 which waits for in-flight readers to drain, before call_rcu(..., shrinker_free_rcu_cb). The sibling "scan"
 handler already invokes the sleeping ->scan_objects() callback with no RCU section. Drop the
 rcu_read_lock()/rcu_read_unlock(). (CVE-2026-64419)

Solution

Update the linux library and its related packages to version 6.1.180-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-64419

Plugin Details

Severity: Medium

ID: 459233

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

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-2026-64419

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: 7/26/2026

Vulnerability Publication Date: 7/23/2026

Reference Information

CVE: CVE-2026-64419