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Echo: linux: security update to 6.1.176-1

critical Tenable Self-Hosted Container Security Plugin ID 465347

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: ksmbd: fix out-of-bounds write in
 smb2_get_ea() EA alignment smb2_get_ea() applies 4-byte alignment padding via memset() after writing each
 EA entry. The bounds check on buf_free_len is performed before the value memcpy, but the alignment memset
 fires unconditionally afterward with no check on remaining space. When the EA value exactly fills the
 remaining buffer (buf_free_len == 0 after value subtraction), the alignment memset writes 1-3 NUL bytes
 past the buf_free_len boundary. In compound requests where the response buffer is shared across commands,
 the first command (e.g., READ) can consume most of the buffer, leaving a tight remainder for the
 QUERY_INFO EA response. The alignment memset then overwrites past the physical kvmalloc allocation into
 adjacent kernel heap memory. Add a bounds check before the alignment memset to ensure buf_free_len can
 accommodate the padding bytes. This is the same bug pattern fixed by commit beef2634f81f ("ksmbd: fix
 potencial OOB in get_file_all_info() for compound requests") and commit fda9522ed6af ("ksmbd: fix OOB
 write in QUERY_INFO for compound requests"), both of which added bounds checks before unconditional writes
 in QUERY_INFO response handlers. (CVE-2026-31705)

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-2026-31705

Plugin Details

Severity: Critical

ID: 465347

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.82

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-31705

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 5/2/2026

Vulnerability Publication Date: 5/1/2026

Reference Information

CVE: CVE-2026-31705