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Echo: linux: security update to 6.1.176-1

medium Tenable Self-Hosted Container Security Plugin ID 463214

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: tracepoint: balance regfunc() on
 func_add() failure in tracepoint_add_func() When a tracepoint goes through the 0 -> 1 transition,
 tracepoint_add_func() invokes the subsystem's ext->regfunc() before attempting to install the new probe
 via func_add(). If func_add() then fails (for example, when allocate_probes() cannot allocate a new probe
 array under memory pressure and returns -ENOMEM), the function returns the error without calling the
 matching ext->unregfunc(), leaving the side effects of regfunc() behind with no installed probe to justify
 them. For syscall tracepoints this is particularly unpleasant: syscall_regfunc() bumps
 sys_tracepoint_refcount and sets SYSCALL_TRACEPOINT on every task. After a leaked failure, the refcount is
 stuck at a non-zero value with no consumer, and every task continues paying the syscall trace entry/exit
 overhead until reboot. Other subsystems providing regfunc()/unregfunc() pairs exhibit similarly scoped
 persistent state. Mirror the existing 1 -> 0 cleanup and call ext->unregfunc() in the func_add() error
 path, gated on the same condition used there so the unwind is symmetric with the registration.
 (CVE-2026-46196)

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-2026-46196

Plugin Details

Severity: Medium

ID: 463214

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

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-2026-46196

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: 5/28/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2026-46196