Echo: linux: security update to 6.1.180-1

medium Tenable Self-Hosted Container Security Plugin ID 455141

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 mechToken leak when SPNEGO
decode fails after token alloc The kernel ASN.1 BER decoder calls action callbacks incrementally as it
walks the input. When ksmbd_decode_negTokenInit() reaches the mechToken [2] OCTET STRING element,
ksmbd_neg_token_alloc() allocates conn->mechToken immediately via kmemdup_nul(). If a later element in the
same blob is malformed, then the decoder will return nonzero after the allocation is already live. This
could happen if mechListMIC [3] overrunse the enclosing SEQUENCE. decode_negotiation_token() then sets
conn->use_spnego = false because both the negTokenInit and negTokenTarg grammars failed. The cleanup at
the bottom of smb2_sess_setup() is gated on use_spnego: if (conn->use_spnego && conn->mechToken) {
kfree(conn->mechToken); conn->mechToken = NULL; } so the kfree is skipped, causing the mechToken to never
be freed. This codepath is reachable pre-authentication, so untrusted clients can cause slow memory leaks
on a server without even being properly authenticated. Fix this up by not checking check for use_spnego,
as it's not required, so the memory will always be properly freed. At the same time, always free the
memory in ksmbd_conn_free() incase some other failure path forgot to free it. (CVE-2026-31610)

Solution

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

Plugin Details

Severity: Medium

ID: 455141

Version: Revision 1.2

Type: Local

Family: Echo Local Security Checks

Published: 10/1/2026

Updated: 10/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.65

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-31610

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 5/1/2026

Vulnerability Publication Date: 4/24/2026

Reference Information

CVE: CVE-2026-31610

Detections

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