Echo: linux: security update to 6.1.176-1

high Tenable Cloud Security Plugin ID 459787

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: rxrpc: Fix missing validation of
ticket length in non-XDR key preparsing In rxrpc_preparse(), there are two paths for parsing key payloads:
the XDR path (for large payloads) and the non-XDR path (for payloads <= 28 bytes). While the XDR path
(rxrpc_preparse_xdr_rxkad()) correctly validates the ticket length against AFSTOKEN_RK_TIX_MAX, the non-
XDR path fails to do so. This allows an unprivileged user to provide a very large ticket length. When this
key is later read via rxrpc_read(), the total token size (toksize) calculation results in a value that
exceeds AFSTOKEN_LENGTH_MAX, triggering a WARN_ON(). [ 2001.302904] WARNING: CPU: 2 PID: 2108 at
net/rxrpc/key.c:778 rxrpc_read+0x109/0x5c0 [rxrpc] Fix this by adding a check in the non-XDR parsing path
of rxrpc_preparse() to ensure the ticket length does not exceed AFSTOKEN_RK_TIX_MAX, bringing it into
parity with the XDR parsing logic. (CVE-2026-31696)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

Plugin Details

Severity: High

ID: 459787

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

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-2026-31696

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: 5/2/2026

Vulnerability Publication Date: 5/1/2026

Reference Information

CVE: CVE-2026-31696

Detections

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