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Echo: linux: security update to 6.1.176-1

high Tenable Cloud Security Plugin ID 459182

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: tee: optee: prevent use-after-free
 when the client exits before the supplicant Commit 70b0d6b0a199 ("tee: optee: Fix supplicant wait loop")
 made the client wait as killable so it can be interrupted during shutdown or after a supplicant crash.
 This changes the original lifetime expectations: the client task can now terminate while the supplicant is
 still processing its request. If the client exits first it removes the request from its queue and kfree()s
 it, while the request ID remains in supp->idr. A subsequent lookup on the supplicant path then
 dereferences freed memory, leading to a use-after-free. Serialise access to the request with supp->mutex:
 * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while looking up and touching the request. *
 Let optee_supp_thrd_req() notice that the client has terminated and signal optee_supp_send() accordingly.
 With these changes the request cannot be freed while the supplicant still has a reference, eliminating the
 race. (CVE-2026-53273)

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-2026-53273

Plugin Details

Severity: High

ID: 459182

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.27

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-2026-53273

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-2026-53273