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Echo: linux: security update to 6.1.170-1

high Tenable Self-Hosted Container Security Plugin ID 455229

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: tipc: fix bc_ackers underflow on
 duplicate GRP_ACK_MSG The GRP_ACK_MSG handler in tipc_group_proto_rcv() currently decrements bc_ackers on
 every inbound group ACK, even when the same member has already acknowledged the current broadcast round.
 Because bc_ackers is a u16, a duplicate ACK received after the last legitimate ACK wraps the counter to
 65535. Once wrapped, tipc_group_bc_cong() keeps reporting congestion and later group broadcasts on the
 affected socket stay blocked until the group is recreated. Fix this by ignoring duplicate or stale ACKs
 before touching bc_acked or bc_ackers. This makes repeated GRP_ACK_MSG handling idempotent and prevents
 the underflow path. (CVE-2026-31662)

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-2026-31662

Plugin Details

Severity: High

ID: 455229

Version: Revision 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-31662

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 4/23/2026

Reference Information

CVE: CVE-2026-31662