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Echo: linux: security update to 6.1.164-1

medium Tenable Self-Hosted Container Security Plugin ID 458925

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: romfs: check sb_set_blocksize() return
 value romfs_fill_super() ignores the return value of sb_set_blocksize(), which can fail if the requested
 block size is incompatible with the block device's configuration. This can be triggered by setting a loop
 device's block size larger than PAGE_SIZE using ioctl(LOOP_SET_BLOCK_SIZE, 32768), then mounting a romfs
 filesystem on that device. When sb_set_blocksize(sb, ROMBSIZE) is called with ROMBSIZE=4096 but the device
 has logical_block_size=32768, bdev_validate_blocksize() fails because the requested size is smaller than
 the device's logical block size. sb_set_blocksize() returns 0 (failure), but romfs ignores this and
 continues mounting. The superblock's block size remains at the device's logical block size (32768). Later,
 when sb_bread() attempts I/O with this oversized block size, it triggers a kernel BUG in folio_set_bh():
 kernel BUG at fs/buffer.c:1582! BUG_ON(size > PAGE_SIZE); Fix by checking the return value of
 sb_set_blocksize() and failing the mount with -EINVAL if it returns 0. (CVE-2026-23238)

Solution

Update the linux library and its related packages to version 6.1.164-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-23238

Plugin Details

Severity: Medium

ID: 458925

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

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-2026-23238

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: 3/23/2026

Vulnerability Publication Date: 2/26/2026

Reference Information

CVE: CVE-2026-23238