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Echo: linux: security update to 6.12.25-1

medium Tenable Self-Hosted Container Security Plugin ID 463853

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: btrfs: harden block_group::bg_list
 against list_del() races As far as I can tell, these calls of list_del_init() on bg_list cannot run
 concurrently with btrfs_mark_bg_unused() or btrfs_mark_bg_to_reclaim(), as they are in transaction error
 paths and situations where the block group is readonly. However, if there is any chance at all of racing
 with mark_bg_unused(), or a different future user of bg_list, better to be safe than sorry. Otherwise we
 risk the following interleaving (bg_list refcount in parens) T1 (some random op) T2 (btrfs_mark_bg_unused)
 !list_empty(&bg->bg_list); (1) list_del_init(&bg->bg_list); (1) list_move_tail (1) btrfs_put_block_group
 (0) btrfs_delete_unused_bgs bg = list_first_entry list_del_init(&bg->bg_list); btrfs_put_block_group(bg);
 (-1) Ultimately, this results in a broken ref count that hits zero one deref early and the real final
 deref underflows the refcount, resulting in a WARNING. (CVE-2025-37856)

Solution

Update the linux library and its related packages to version 6.12.25-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-37856

Plugin Details

Severity: Medium

ID: 463853

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

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-2025-37856

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: 5/9/2025

Reference Information

CVE: CVE-2025-37856