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Echo: linux: security update to 6.1.135-1

medium Tenable Cloud Security Plugin ID 459700

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: mptcp: fix NULL pointer in
 can_accept_new_subflow When testing valkey benchmark tool with MPTCP, the kernel panics in
 'mptcp_can_accept_new_subflow' because subflow_req->msk is NULL. Call trace: mptcp_can_accept_new_subflow
 (./net/mptcp/subflow.c:63 (discriminator 4)) (P) subflow_syn_recv_sock (./net/mptcp/subflow.c:854)
 tcp_check_req (./net/ipv4/tcp_minisocks.c:863) tcp_v4_rcv (./net/ipv4/tcp_ipv4.c:2268)
 ip_protocol_deliver_rcu (./net/ipv4/ip_input.c:207) ip_local_deliver_finish (./net/ipv4/ip_input.c:234)
 ip_local_deliver (./net/ipv4/ip_input.c:254) ip_rcv_finish (./net/ipv4/ip_input.c:449) ... According to
 the debug log, the same req received two SYN-ACK in a very short time, very likely because the client
 retransmits the syn ack due to multiple reasons. Even if the packets are transmitted with a relevant time
 interval, they can be processed by the server on different CPUs concurrently). The 'subflow_req->msk'
 ownership is transferred to the subflow the first, and there will be a risk of a null pointer dereference
 here. This patch fixes this issue by moving the 'subflow_req->msk' under the `own_req == true`
 conditional. Note that the !msk check in subflow_hmac_valid() can be dropped, because the same check
 already exists under the own_req mpj branch where the code has been moved to. (CVE-2025-23145)

Solution

Update the linux library and its related packages to version 6.1.135-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-23145

Plugin Details

Severity: Medium

ID: 459700

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

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-2025-23145

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: 9/15/2025

Vulnerability Publication Date: 5/1/2025

Reference Information

CVE: CVE-2025-23145