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Echo: linux: security update to 6.1.162-1

medium Tenable Cloud Security Plugin ID 458119

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: check device's attached status
 in compat ioctls Syzbot identified an issue [1] that crashes kernel, seemingly due to unexistent callback
 dev->get_valid_routes(). By all means, this should not occur as said callback must always be set to
 get_zero_valid_routes() in __comedi_device_postconfig(). As the crash seems to appear exclusively in i386
 kernels, at least, judging from [1] reports, the blame lies with compat versions of standard IOCTL
 handlers. Several of them are modified and do not use comedi_unlocked_ioctl(). While functionality of
 these ioctls essentially copy their original versions, they do not have required sanity check for device's
 attached status. This, in turn, leads to a possibility of calling select IOCTLs on a device that has not
 been properly setup, even via COMEDI_DEVCONFIG. Doing so on unconfigured devices means that several
 crucial steps are missed, for instance, specifying dev->get_valid_routes() callback. Fix this somewhat
 crudely by ensuring device's attached status before performing any ioctls, improving logic consistency
 between modern and compat functions. [1] Syzbot report: BUG: kernel NULL pointer dereference, address:
 0000000000000000 ... CR2: ffffffffffffffd6 CR3: 000000006c717000 CR4: 0000000000352ef0 Call Trace: <TASK>
 get_valid_routes drivers/comedi/comedi_fops.c:1322 [inline] parse_insn+0x78c/0x1970
 drivers/comedi/comedi_fops.c:1401 do_insnlist_ioctl+0x272/0x700 drivers/comedi/comedi_fops.c:1594
 compat_insnlist drivers/comedi/comedi_fops.c:3208 [inline] comedi_compat_ioctl+0x810/0x990
 drivers/comedi/comedi_fops.c:3273 __do_compat_sys_ioctl fs/ioctl.c:695 [inline] __se_compat_sys_ioctl
 fs/ioctl.c:638 [inline] __ia32_compat_sys_ioctl+0x242/0x370 fs/ioctl.c:638 do_syscall_32_irqs_on
 arch/x86/entry/syscall_32.c:83 [inline] ... (CVE-2025-68257)

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-2025-68257

Plugin Details

Severity: Medium

ID: 458119

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-2025-68257

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: 12/17/2025

Vulnerability Publication Date: 12/16/2025

Reference Information

CVE: CVE-2025-68257