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Echo: linux: security update to 6.1.162-1

medium Tenable Self-Hosted Container Security Plugin ID 457624

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: comedi: pcl818: fix null-ptr-deref in
 pcl818_ai_cancel() Syzbot identified an issue [1] in pcl818_ai_cancel(), which stems from the fact that in
 case of early device detach via pcl818_detach(), subdevice dev->read_subdev may not have initialized its
 pointer to &struct comedi_async as intended. Thus, any such dereferencing of &s->async->cmd will lead to
 general protection fault and kernel crash. Mitigate this problem by removing a call to pcl818_ai_cancel()
 from pcl818_detach() altogether. This way, if the subdevice setups its support for async commands,
 everything async-related will be handled via subdevice's own ->cancel() function in
 comedi_device_detach_locked() even before pcl818_detach(). If no support for asynchronous commands is
 provided, there is no need to cancel anything either. [1] Syzbot crash: Oops: general protection fault,
 probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in
 range [0x0000000000000028-0x000000000000002f] CPU: 1 UID: 0 PID: 6050 Comm: syz.0.18 Not tainted syzkaller
 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
 RIP: 0010:pcl818_ai_cancel+0x69/0x3f0 drivers/comedi/drivers/pcl818.c:762 ... Call Trace: <TASK>
 pcl818_detach+0x66/0xd0 drivers/comedi/drivers/pcl818.c:1115 comedi_device_detach_locked+0x178/0x750
 drivers/comedi/drivers.c:207 do_devconfig_ioctl drivers/comedi/comedi_fops.c:848 [inline]
 comedi_unlocked_ioctl+0xcde/0x1020 drivers/comedi/comedi_fops.c:2178 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline] ... (CVE-2025-68335)

Solution

Update the linux library and its related packages to version 6.1.162-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-68335

Plugin Details

Severity: Medium

ID: 457624

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.42

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-2025-68335

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: 12/23/2025

Vulnerability Publication Date: 12/22/2025

Reference Information

CVE: CVE-2025-68335