Bottlerocket: kernel-5.15, kernel-6.1: security update to 2.4.0

medium Tenable Cloud Security Plugin ID 427989

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: perf: Fix event leak upon exec and
file release The perf pending task work is never waited upon the matching event release. In the case of a
child event, released via free_event() directly, this can potentially result in a leaked event, such as in
the following scenario that doesn't even require a weak IRQ work implementation to trigger: schedule()
prepare_task_switch() =======> <NMI> perf_event_overflow() event->pending_sigtrap = ...
irq_work_queue(&event->pending_irq) <======= </NMI> perf_event_task_sched_out() event_sched_out()
event->pending_sigtrap = 0; atomic_long_inc_not_zero(&event->refcount) task_work_add(&event->pending_task)
finish_lock_switch() =======> <IRQ> perf_pending_irq() //do nothing, rely on pending task work <=======
</IRQ> begin_new_exec() perf_event_exit_task() perf_event_exit_event() // If is child event free_event()
WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1) // event is leaked Similar scenarios can also
happen with perf_event_remove_on_exec() or simply against concurrent perf_event_release(). Fix this with
synchonizing against the possibly remaining pending task work while freeing the event, just like is done
with remaining pending IRQ work. This means that the pending task callback neither need nor should hold a
reference to the event, preventing it from ever beeing freed. (CVE-2024-43869)

Plugin Details

Severity: Medium

ID: 427989

Version: Revision 1.4

Type: Local

Family: Bottlerocket Local Security Checks

Published: 6/30/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.15

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-2024-43869

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

Vulnerability Publication Date: 8/21/2024

Reference Information

CVE: CVE-2024-43869

Detections

Analytics