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Echo: linux: security update to 6.1.176-1

high Tenable Self-Hosted Container Security Plugin ID 463800

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: isofs: validate block number from NFS
 file handle in isofs_export_iget isofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker-
 controlled block number (ifid->block or ifid->parent_block) from the NFS file handle to
 isofs_export_iget(), which only rejects block == 0 before calling isofs_iget() and ultimately sb_bread().
 A crafted file handle with fh_len sufficient to pass the check added by commit 0405d4b63d08 ("isofs:
 Prevent the use of too small fid") can still drive the server to read any in-range block on the backing
 device as if it were an iso_directory_record. That earlier fix was assigned CVE-2025-37780. sb_bread() on
 an out-of-range block returns NULL cleanly via the EIO path, so there is no memory-safety violation. For
 in-range reads of adjacent-partition data on the same block device, the unrelated bytes end up in
 iso_inode_info fields that reach the NFS client as dentry metadata. The deployment surface (isofs exported
 over NFS from loop-mounted images) is narrow and requires an authenticated NFS peer, but the malformed-
 file-handle class is reportable as hardening next to the existing CVE-2025-37780 fix. Reject block >=
 ISOFS_SB(sb)->s_nzones in isofs_export_iget() so the check covers both isofs_fh_to_dentry() and
 isofs_fh_to_parent() call sites with a single line. (CVE-2026-46124)

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-2026-46124

Plugin Details

Severity: High

ID: 463800

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.7

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-46124

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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-2026-46124