Detections
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Echo: linux: security update to 6.12.43-1

medium Tenable Cloud Security Plugin ID 457492

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: loop: Avoid updating block size under
 exclusive owner Syzbot came up with a reproducer where a loop device block size is changed underneath a
 mounted filesystem. This causes a mismatch between the block device block size and the block size stored
 in the superblock causing confusion in various places such as fs/buffer.c. The particular issue triggered
 by syzbot was a warning in __getblk_slow() due to requested buffer size not matching block device block
 size. Fix the problem by getting exclusive hold of the loop device to change its block size. This fails if
 somebody (such as filesystem) has already an exclusive ownership of the block device and thus prevents
 modifying the loop device under some exclusive owner which doesn't expect it. (CVE-2025-38709)

Solution

Update the linux library and its related packages to version 6.12.43-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-38709

Plugin Details

Severity: Medium

ID: 457492

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.33

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-2025-38709

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: 9/15/2025

Vulnerability Publication Date: 9/4/2025

Reference Information

CVE: CVE-2025-38709