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Echo: linux: security update to 6.1.176-1

medium Tenable Self-Hosted Container Security Plugin ID 463499

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: drm/v3d: Reject empty multisync
 extension to prevent infinite loop v3d_get_extensions() walks a userspace-provided singly-linked list of
 ioctl extensions without any bound on the chain length. A local user can craft a self-referential
 extension (ext->next == &ext) with zero in_sync_count and out_sync_count, which bypasses the existing
 duplicate- extension guard: if (se->in_sync_count || se->out_sync_count) return -EINVAL; The guard never
 fires because v3d_get_multisync_post_deps() returns immediately when count is zero, leaving both fields at
 zero on every iteration. The result is an infinite loop in kernel context, blocking the calling thread and
 pegging a CPU core indefinitely. Fix this by rejecting a multisync extension where both in_sync_count and
 out_sync_count are zero in v3d_get_multisync_submit_deps(). An empty multisync carries no synchronization
 information and serves no useful purpose, so returning -EINVAL for such an extension is the correct
 defense against this attack vector. (CVE-2026-46314)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-46314

Plugin Details

Severity: Medium

ID: 463499

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.96

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-2026-46314

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: 6/9/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-46314