🛡️ AZL-53382 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2024-50249 affecting package kernel for versions less than 6.6.64.2-1

In the Linux kernel, the following vulnerability has been resolved:

ACPI: CPPC: Make rmw_lock a raw_spin_lock

The following BUG was triggered:

=============================

[ BUG: Invalid wait context ]

6.12.0-rc2-XXX #406 Not tainted

-----------------------------

kworker/1:1/62 is trying to lock:

ffffff8801593030 (&cpc_ptr->rmw_lock){+.+.}-{3:3}, at: cpc_write+0xcc/0x370

other info that might help us debug this:

context-{5:5}

2 locks held by kworker/1:1/62:

#0: ffffff897ef5ec98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x50

#1: ffffff880154e238 (&sg_policy->update_lock){....}-{2:2}, at: sugov_update_shared+0x3c/0x280

stack backtrace:

CPU: 1 UID: 0 PID: 62 Comm: kworker/1:1 Not tainted 6.12.0-rc2-g9654bd3e8806 #406

Workqueue: 0x0 (events)

Call trace:

dump_backtrace+0xa4/0x130

show_stack+0x20/0x38

dump_stack_lvl+0x90/0xd0

dump_stack+0x18/0x28

__lock_acquire+0x480/0x1ad8

lock_acquire+0x114/0x310

_raw_spin_lock+0x50/0x70

cpc_write+0xcc/0x370

cppc_set_perf+0xa0/0x3a8

cppc_cpufreq_fast_switch+0x40/0xc0

cpufreq_driver_fast_switch+0x4c/0x218

sugov_update_shared+0x234/0x280

update_load_avg+0x6ec/0x7b8

dequeue_entities+0x108/0x830

dequeue_task_fair+0x58/0x408

__schedule+0x4f0/0x1070

schedule+0x54/0x130

worker_thread+0xc0/0x2e8

kthread+0x130/0x148

ret_from_fork+0x10/0x20

sugov_update_shared() locks a raw_spinlock while cpc_write() locks a

spinlock.

To have a correct wait-type order, update rmw_lock to a raw spinlock and

ensure that interrupts will be disabled on the CPU holding it.

[ rjw: Changelog edits ]

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

AZL-53382 is recorded against 1 package.

  • kernel (fixed in 6.6.64.2-1)

Timeline and source

Published on 9 November 2024 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-11-09
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — 6.6.64.2-1

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