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Echo: linux: security update to 6.1.176-1

high Tenable Self-Hosted Container Security Plugin ID 464756

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: dm-thin: fix metadata refcount
 underflow There's a bug in dm-thin in the function rebalance_children. If the internal btree node has one
 entry, the code tries to copy all btree entries from the node's child to the node itself and then
 decrement the child's reference count. If the child node is shared (it has reference count > 1), we won't
 free it, so there would be two pointers to each of the grandchildren nodes. But the reference counts of
 the grandchildren is not increased, thus the reference count doesn't match the number of pointers that
 point to the grandchildren. This results in "device mapper: space map common: unable to decrement block"
 errors. Fix this bug by incrementing reference counts on the grandchildren if the btree node is shared.
 (CVE-2026-46107)

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-2026-46107

Plugin Details

Severity: High

ID: 464756

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.27

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-2026-46107

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: 5/28/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2026-46107