Echo: linux: security update to 6.1.176-1

medium Tenable Self-Hosted Container Security Plugin ID 461433

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: nilfs2: reject zero bd_oblocknr in
nilfs_ioctl_mark_blocks_dirty() nilfs_ioctl_mark_blocks_dirty() uses bd_oblocknr to detect dead blocks by
comparing it with the current block number bd_blocknr. If they differ, the block is considered dead and
skipped. However, bd_oblocknr should never be 0 since block 0 typically stores the primary superblock and
is never a valid GC target block. A corrupted ioctl request with bd_oblocknr set to 0 causes the
comparison to incorrectly match when the lookup returns -ENOENT and sets bd_blocknr to 0, bypassing the
dead block check and calling nilfs_bmap_mark() on a non-existent block. This causes
nilfs_btree_do_lookup() to return -ENOENT, triggering the WARN_ON(ret == -ENOENT). Fix this by rejecting
ioctl requests with bd_oblocknr set to 0 at the beginning of each iteration. [ryusuke: slightly modified
the commit message and comments for accuracy] (CVE-2026-53320)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

Plugin Details

Severity: Medium

ID: 461433

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

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-2026-53320

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: 6/28/2026

Vulnerability Publication Date: 6/3/2026

Reference Information

CVE: CVE-2026-53320

Detections

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