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Echo: linux: security update to 6.1.170-1

medium Tenable Self-Hosted Container Security Plugin ID 457951

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: Bluetooth: L2CAP: Fix ERTM re-init and
 zero pdu_len infinite loop l2cap_config_req() processes CONFIG_REQ for channels in BT_CONNECTED state to
 support L2CAP reconfiguration (e.g. MTU changes). However, since both CONF_INPUT_DONE and CONF_OUTPUT_DONE
 are already set from the initial configuration, the reconfiguration path falls through to
 l2cap_ertm_init(), which re-initializes tx_q, srej_q, srej_list, and retrans_list without freeing the
 previous allocations and sets chan->sdu to NULL without freeing the existing skb. This leaks all
 previously allocated ERTM resources. Additionally, l2cap_parse_conf_req() does not validate the minimum
 value of remote_mps derived from the RFC max_pdu_size option. A zero value propagates to
 l2cap_segment_sdu() where pdu_len becomes zero, causing the while loop to never terminate since len is
 never decremented, exhausting all available memory. Fix the double-init by skipping l2cap_ertm_init() and
 l2cap_chan_ready() when the channel is already in BT_CONNECTED state, while still allowing the
 reconfiguration parameters to be updated through l2cap_parse_conf_req(). Also add a pdu_len zero check in
 l2cap_segment_sdu() as a safeguard. (CVE-2026-31498)

Solution

Update the linux library and its related packages to version 6.1.170-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-31498

Plugin Details

Severity: Medium

ID: 457951

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

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-2026-31498

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: 4/22/2026

Reference Information

CVE: CVE-2026-31498