Detections
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Echo: linux: security update to 6.12.85-1

high Tenable Cloud Security Plugin ID 464243

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 OOB write in QUERY_INFO for
 compound requests When a compound request such as READ + QUERY_INFO(Security) is received, and the first
 command (READ) consumes most of the response buffer, ksmbd could write beyond the allocated buffer while
 building a security descriptor. The root cause was that smb2_get_info_sec() checked buffer space using
 ppntsd_size from xattr, while build_sec_desc() often synthesized a significantly larger descriptor from
 POSIX ACLs. This patch introduces smb_acl_sec_desc_scratch_len() to accurately compute the final
 descriptor size beforehand, performs proper buffer checking with smb2_calc_max_out_buf_len(), and uses
 exact-sized allocation + iov pinning. (CVE-2026-31432)

Solution

Update the linux library and its related packages to version 6.12.85-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-31432

Plugin Details

Severity: High

ID: 464243

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.94

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-31432

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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: 5/1/2026

Vulnerability Publication Date: 4/22/2026

Reference Information

CVE: CVE-2026-31432