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Echo: linux: security update to 6.1.176-1

high Tenable Cloud Security Plugin ID 457732

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: ALSA: PCM: Fix wait queue list
 corruption in snd_pcm_drain() on linked streams snd_pcm_drain() uses init_waitqueue_entry which does not
 clear entry.prev/next, and add_wait_queue with a conditional remove_wait_queue that is skipped when
 to_check is no longer in the group after concurrent UNLINK. The orphaned wait entry remains on the
 unlinked substream sleep queue. On the next drain iteration, add_wait_queue adds the entry to a new queue
 while still linked on the old one, corrupting both lists. A subsequent wake_up dereferences NULL at the
 func pointer (mapped from the spinlock at offset 0 of the misinterpreted wait_queue_head_t), causing a
 kernel panic. Replace init_waitqueue_entry/add_wait_queue/conditional remove_wait_queue with
 init_wait_entry/prepare_to_wait/ finish_wait. init_wait_entry clears prev/next via INIT_LIST_HEAD on each
 iteration and sets autoremove_wake_function which auto-removes the entry on wake-up. finish_wait safely
 handles both the already-removed and still-queued cases. (CVE-2026-53242)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-53242

Plugin Details

Severity: High

ID: 457732

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.84

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-2026-53242

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: 6/25/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-53242