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Echo: linux: security update to 6.1.180-1

high Tenable Self-Hosted Container Security Plugin ID 459281

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 UAF of struct file_lock in
 SMB2_LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the
 FILE_LOCK_DEFERRED path, ksmbd registers the asynchronous work into the connection's async_requests list
 via setup_async_work(). The cancel callback smb2_remove_blocked_lock() holds a reference to the flock. If
 the lock waiter is subsequently woken up but the work state is no longer KSMBD_WORK_ACTIVE (e.g., due to a
 concurrent cancellation), the cleanup path calls locks_free_lock(flock) without dequeuing the work from
 the async_requests list. Concurrently, smb2_cancel() walks the list under conn->request_lock and invokes
 the cancel callback, which then dereferences the already freed 'flock'. This leads to a slab-use-after-
 free inside __wake_up_common. Fix this by restructuring the cleanup logic after the worker returns from
 ksmbd_vfs_posix_lock_wait(). Move list_del(&smb_lock->llist) and release_async_work(work) to the top of
 the cleanup block. This guarantees that the async work is completely dequeued and serialized under
 conn->request_lock before locks_free_lock(flock) is called, rendering the flock unreachable for any
 concurrent smb2_cancel(). (CVE-2026-64396)

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-2026-64396

Plugin Details

Severity: High

ID: 459281

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.4

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-2026-64396

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-2026-64396