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Echo: linux: security update to 6.1.176-1

high Tenable Cloud Security Plugin ID 462188

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: ctxfi: Limit PTP to a single
 page Commit 391e69143d0a increased CT_PTP_NUM from 1 to 4 to support 256 playback streams, but the
 additional pages are not used by the card correctly. The CT20K2 hardware already has multiple VMEM_PTPAL
 registers, but using them separately would require refactoring the entire virtual memory allocation logic.
 ct_vm_map() always uses PTEs in vm->ptp[0].area regardless of CT_PTP_NUM. On AMD64 systems, a single PTP
 covers 512 PTEs (2M). When aggregate memory allocations exceed this limit, ct_vm_map() tries to access
 beyond the allocated space and causes a page fault: BUG: unable to handle page fault for address:
 ffffd4ae8a10a000 Oops: Oops: 0002 [#1] SMP PTI RIP: 0010:ct_vm_map+0x17c/0x280 [snd_ctxfi] Call Trace:
 atc_pcm_playback_prepare+0x225/0x3b0 ct_pcm_playback_prepare+0x38/0x60 snd_pcm_do_prepare+0x2f/0x50
 snd_pcm_action_single+0x36/0x90 snd_pcm_action_nonatomic+0xbf/0xd0 snd_pcm_ioctl+0x28/0x40
 __x64_sys_ioctl+0x97/0xe0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e Revert
 CT_PTP_NUM to 1. The 256 SRC_RESOURCE_NUM and playback_count remain unchanged. (CVE-2026-31602)

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-2026-31602

Plugin Details

Severity: High

ID: 462188

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.94

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-2026-31602

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: 4/24/2026

Reference Information

CVE: CVE-2026-31602