CVE-2025-21803

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21803
In the Linux kernel, the following vulnerability has been resolved: LoongArch: Fix warnings during S3 suspend The enable_gpe_wakeup() function calls acpi_enable_all_wakeup_gpes(), and the later one may call the preempt_schedule_common() function, resulting in a thread switch and causing the CPU to be in an interrupt enabled state after the enable_gpe_wakeup() function returns, leading to the warnings as follow. [ C0] WARNING: ... at kernel/time/timekeeping.c:845 ktime_get+0xbc/0xc8 [ C0] ... [ C0] Call Trace: [ C0] [<90000000002243b4>] show_stack+0x64/0x188 [ C0] [<900000000164673c>] dump_stack_lvl+0x60/0x88 [ C0] [<90000000002687e4>] __warn+0x8c/0x148 [ C0] [<90000000015e9978>] report_bug+0x1c0/0x2b0 [ C0] [<90000000016478e4>] do_bp+0x204/0x3b8 [ C0] [<90000000025b1924>] exception_handlers+0x1924/0x10000 [ C0] [<9000000000343bbc>] ktime_get+0xbc/0xc8 [ C0] [<9000000000354c08>] tick_sched_timer+0x30/0xb0 [ C0] [<90000000003408e0>] __hrtimer_run_queues+0x160/0x378 [ C0] [<9000000000341f14>] hrtimer_interrupt+0x144/0x388 [ C0] [<9000000000228348>] constant_timer_interrupt+0x38/0x48 [ C0] [<90000000002feba4>] __handle_irq_event_percpu+0x64/0x1e8 [ C0] [<90000000002fed48>] handle_irq_event_percpu+0x20/0x80 [ C0] [<9000000000306b9c>] handle_percpu_irq+0x5c/0x98 [ C0] [<90000000002fd4a0>] generic_handle_domain_irq+0x30/0x48 [ C0] [<9000000000d0c7b0>] handle_cpu_irq+0x70/0xa8 [ C0] [<9000000001646b30>] handle_loongarch_irq+0x30/0x48 [ C0] [<9000000001646bc8>] do_vint+0x80/0xe0 [ C0] [<90000000002aea1c>] finish_task_switch.isra.0+0x8c/0x2a8 [ C0] [<900000000164e34c>] __schedule+0x314/0xa48 [ C0] [<900000000164ead8>] schedule+0x58/0xf0 [ C0] [<9000000000294a2c>] worker_thread+0x224/0x498 [ C0] [<900000000029d2f0>] kthread+0xf8/0x108 [ C0] [<9000000000221f28>] ret_from_kernel_thread+0xc/0xa4 [ C0] [ C0] ---[ end trace 0000000000000000 ]--- The root cause is acpi_enable_all_wakeup_gpes() uses a mutex to protect acpi_hw_enable_all_wakeup_gpes(), and acpi_ut_acquire_mutex() may cause a thread switch. Since there is no longer concurrent execution during loongarch_acpi_suspend(), we can call acpi_hw_enable_all_wakeup_gpes() directly in enable_gpe_wakeup(). The solution is similar to commit 22db06337f590d01 ("ACPI: sleep: Avoid breaking S3 wakeup due to might_sleep()").

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/194d26a5a43c26dc98a9b4e2c1d521dcb84dd1bf Patch
https://git.kernel.org/stable/c/26c0a2d93af55d30a46d5f45d3e9c42cde730168 Patch
https://git.kernel.org/stable/c/8682a71a7f6de7c683f31b4334b04e19685a05f9 Patch
https://git.kernel.org/stable/c/d49ab6857d98266010f3446c9c2063014db5b654 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

28 Oct 2025, 02:59

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/194d26a5a43c26dc98a9b4e2c1d521dcb84dd1bf - () https://git.kernel.org/stable/c/194d26a5a43c26dc98a9b4e2c1d521dcb84dd1bf - Patch
References () https://git.kernel.org/stable/c/26c0a2d93af55d30a46d5f45d3e9c42cde730168 - () https://git.kernel.org/stable/c/26c0a2d93af55d30a46d5f45d3e9c42cde730168 - Patch
References () https://git.kernel.org/stable/c/8682a71a7f6de7c683f31b4334b04e19685a05f9 - () https://git.kernel.org/stable/c/8682a71a7f6de7c683f31b4334b04e19685a05f9 - Patch
References () https://git.kernel.org/stable/c/d49ab6857d98266010f3446c9c2063014db5b654 - () https://git.kernel.org/stable/c/d49ab6857d98266010f3446c9c2063014db5b654 - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: LoongArch: Se corrigen advertencias durante la suspensión de S3 La función enable_gpe_wakeup() llama a acpi_enable_all_wakeup_gpes(), y la última puede llamar a la función preempt_schedule_common(), lo que da como resultado un cambio de hilo y hace que la CPU esté en un estado de interrupción habilitada después de que la función enable_gpe_wakeup() regrese, lo que genera las advertencias siguientes. [ C0] ADVERTENCIA: ... en kernel/time/timekeeping.c:845 ktime_get+0xbc/0xc8 [ C0] ... [ C0] Call Trace: [ C0] [&lt;90000000002243b4&gt;] show_stack+0x64/0x188 [ C0] [&lt;900000000164673c&gt;] dump_stack_lvl+0x60/0x88 [ C0] [&lt;90000000002687e4&gt;] __warn+0x8c/0x148 [ C0] [&lt;90000000015e9978&gt;] report_bug+0x1c0/0x2b0 [ C0] [&lt;90000000016478e4&gt;] do_bp+0x204/0x3b8 [ C0] [&lt;90000000025b1924&gt;] exception_handlers+0x1924/0x10000 [ C0] [&lt;9000000000343bbc&gt;] ktime_get+0xbc/0xc8 [ C0] [&lt;9000000000354c08&gt;] tick_sched_timer+0x30/0xb0 [ C0] [&lt;90000000003408e0&gt;] __hrtimer_run_queues+0x160/0x378 [ C0] [&lt;9000000000341f14&gt;] hrtimer_interrupt+0x144/0x388 [ C0] [&lt;9000000000228348&gt;] constant_timer_interrupt+0x38/0x48 [ C0] [&lt;90000000002feba4&gt;] __handle_irq_event_percpu+0x64/0x1e8 [ C0] [&lt;90000000002fed48&gt;] handle_irq_event_percpu+0x20/0x80 [ C0] [&lt;9000000000306b9c&gt;] handle_percpu_irq+0x5c/0x98 [ C0] [&lt;90000000002fd4a0&gt;] generic_handle_domain_irq+0x30/0x48 [ C0] [&lt;9000000000d0c7b0&gt;] handle_cpu_irq+0x70/0xa8 [ C0] [&lt;9000000001646b30&gt;] handle_loongarch_irq+0x30/0x48 [ C0] [&lt;9000000001646bc8&gt;] do_vint+0x80/0xe0 [ C0] [&lt;90000000002aea1c&gt;] finish_task_switch.isra.0+0x8c/0x2a8 [ C0] [&lt;900000000164e34c&gt;] __schedule+0x314/0xa48 [ C0] [&lt;900000000164ead8&gt;] schedule+0x58/0xf0 [ C0] [&lt;9000000000294a2c&gt;] worker_thread+0x224/0x498 [ C0] [&lt;900000000029d2f0&gt;] kthread+0xf8/0x108 [ C0] [&lt;9000000000221f28&gt;] ret_from_kernel_thread+0xc/0xa4 [ C0] [ C0] ---[ end trace 0000000000000000 ]--- The root cause is acpi_enable_all_wakeup_gpes() uses a mutex to protect acpi_hw_enable_all_wakeup_gpes(), and acpi_ut_acquire_mutex() may cause a thread switch. Dado que ya no hay ejecución simultánea durante loongarch_acpi_suspend(), podemos llamar a acpi_hw_enable_all_wakeup_gpes() directamente en enable_gpe_wakeup(). La solución es similar a el commit 22db06337f590d01 ("ACPI: sleep: evitar interrumpir la activación de S3 debido a might_sleep()").
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE NVD-CWE-noinfo

27 Feb 2025, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-27 20:16

Updated : 2025-10-28 02:59

NVD link : CVE-2025-21803

Mitre link : CVE-2025-21803

CVE.ORG link : CVE-2025-21803

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo