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Echo: linux: security update to 6.1.180-1

high Tenable Self-Hosted Container Security Plugin ID 464007

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: add a WRITE_DAC/WRITE_OWNER
 check to SMB2 SET_INFO SECURITY commit cc57232cae23 ("ksmbd: fix FSCTL permission bypass by adding a
 permission check for FSCTL_SET_SPARSE") added a fp->daccess gate to fsctl_set_sparse and noted that
 "similar handle-level checks exist in other functions but are missing here." The SMB2 SET_INFO SECURITY
 arm is one of the missing ones, and the most security-relevant: smb2_set_info_sec() calls set_info_sec()
 with no per-handle access check. set_info_sec() (fs/smb/server/smbacl.c) re-permissions the file: it
 rewrites owner/group/mode via notify_change(), rewrites the POSIX ACL via set_posix_acl(), and on
 KSMBD_SHARE_FLAG_ACL_XATTR shares removes and rewrites the Windows security descriptor via
 ksmbd_vfs_set_sd_xattr(). Every other persistent-mutation arm of the sibling handler smb2_set_info_file()
 checks fp->daccess first (FILE_WRITE_DATA / FILE_DELETE / FILE_WRITE_EA / FILE_WRITE_ATTRIBUTES); the
 SECURITY arm — which mutates the access control itself — is the only one with no gate. A client can
 therefore open a handle with FILE_WRITE_ATTRIBUTES only (no FILE_WRITE_DAC / FILE_WRITE_OWNER) and use
 SMB2_SET_INFO with InfoType SMB2_O_INFO_SECURITY to rewrite the file's DACL and owner, granting itself
 access the handle's daccess never carried. Unlike the FSCTL data arms this is a metadata/xattr operation,
 so there is no FMODE_WRITE VFS backstop — the missing fp->daccess check is the entire gate. Setting a
 security descriptor is the WRITE_DAC / WRITE_OWNER operation, so require at least one of those on the
 handle before re-permissioning the file. -EACCES is mapped to STATUS_ACCESS_DENIED by smb2_set_info().
 (CVE-2026-64394)

Solution

Update the linux library and its related packages to version 6.1.180-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-64394

Plugin Details

Severity: High

ID: 464007

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.14

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-2026-64394

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: 7/26/2026

Vulnerability Publication Date: 7/23/2026

Reference Information

CVE: CVE-2026-64394