Detections
Analytics

Echo: linux: security update to 6.1.170-1

high Tenable Cloud Security Plugin ID 464398

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: media: dvb-core: fix wrong
 reinitialization of ringbuffer on reopen dvb_dvr_open() calls dvb_ringbuffer_init() when a new reader
 opens the DVR device. dvb_ringbuffer_init() calls init_waitqueue_head(), which reinitializes the waitqueue
 list head to empty. Since dmxdev->dvr_buffer.queue is a shared waitqueue (all opens of the same DVR device
 share it), this orphans any existing waitqueue entries from io_uring poll or epoll, leaving them with
 stale prev/next pointers while the list head is reset to {self, self}. The waitqueue and spinlock in
 dvr_buffer are already properly initialized once in dvb_dmxdev_init(). The open path only needs to reset
 the buffer data pointer, size, and read/write positions. Replace the dvb_ringbuffer_init() call in
 dvb_dvr_open() with direct assignment of data/size and a call to dvb_ringbuffer_reset(), which properly
 resets pread, pwrite, and error with correct memory ordering without touching the waitqueue or spinlock.
 (CVE-2026-23253)

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-2026-23253

Plugin Details

Severity: High

ID: 464398

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.03

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-2026-23253

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: 5/1/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-23253