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Echo: linux: security update to 6.12.94-1

high Tenable Self-Hosted Container Security Plugin ID 460680

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: l2tp: pppol2tp: hold reference to
 session in pppol2tp_ioctl() pppol2tp_ioctl() read sock->sk->sk_user_data directly without any locks or
 reference counting. If a controllable sleep was induced during copy_from_user() (e.g. via a userfaultfd
 page fault sleep), a concurrent socket close could trigger pppol2tp_session_close() asynchronously. This
 frees the l2tp_session structure via the l2tp_session_del_work workqueue. Upon resuming, the ioctl thread
 dereferences the stale session pointer, resulting in a Use-After-Free (UAF). Fix this by securely fetching
 the session reference using the RCU-safe, refcounted helper pppol2tp_sock_to_session(sk) on entry. This
 locks the session's refcount across the sleep. We structured the function to exit via standard err breaks,
 guaranteeing that l2tp_session_put() is cleanly called on all return paths to drop the reference. To
 preserve existing behavior we validate the session and its magic signature only for the specific L2TP
 commands that require it. This ensures that generic/unknown ioctls called on an unconnected socket still
 return -ENOIOCTLCMD and correctly fall back to generic handlers (e.g. in sock_do_ioctl()).
 (CVE-2026-53262)

Solution

Update the linux library and its related packages to version 6.12.94-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-53262

Plugin Details

Severity: High

ID: 460680

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.16

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-53262

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/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: 6/25/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-53262