CVE-2022-49841
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
serial: imx: Add missing .thaw_noirq hook
The following warning is seen with non-console UART instance when system hibernates.
On hibernating, pm core calls into related hooks in sequence like:
With .thaw_noirq hook being absent, the clock will be disabled in a unbalanced call which results the warning above.
Adding the missing .thaw_noirq hook as imx_uart_resume_noirq() will have the call sequence corrected as below and thus fix the warning.
Detalles técnicos trazas, registros y código del informe original
[ 37.371969] ------------[ cut here ]------------
[ 37.376599] uart3_root_clk already disabled
[ 37.380810] WARNING: CPU: 0 PID: 296 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0
...
[ 37.506986] Call trace:
[ 37.509432] clk_core_disable+0xa4/0xb0
[ 37.513270] clk_disable+0x34/0x50
[ 37.516672] imx_uart_thaw+0x38/0x5c
[ 37.520250] platform_pm_thaw+0x30/0x6c
[ 37.524089] dpm_run_callback.constprop.0+0x3c/0xd4
[ 37.528972] device_resume+0x7c/0x160
[ 37.532633] dpm_resume+0xe8/0x230
[ 37.536036] hibernation_snapshot+0x288/0x430
[ 37.540397] hibernate+0x10c/0x2e0
[ 37.543798] state_store+0xc4/0xd0
[ 37.547203] kobj_attr_store+0x1c/0x30
[ 37.550953] sysfs_kf_write+0x48/0x60
[ 37.554619] kernfs_fop_write_iter+0x118/0x1ac
[ 37.559063] new_sync_write+0xe8/0x184
[ 37.562812] vfs_write+0x230/0x290
[ 37.566214] ksys_write+0x68/0xf4
[ 37.569529] __arm64_sys_write+0x20/0x2c
[ 37.573452] invoke_syscall.constprop.0+0x50/0xf0
[ 37.578156] do_el0_svc+0x11c/0x150
[ 37.581648] el0_svc+0x30/0x140
[ 37.584792] el0t_64_sync_handler+0xe8/0xf0
[ 37.588976] el0t_64_sync+0x1a0/0x1a4
[ 37.592639] ---[ end trace 56e22eec54676d75 ]---
.freeze
.freeze_noirq
.thaw_noirq
.thaw
imx_uart_freeze()
clk_prepare_enable()
imx_uart_suspend_noirq()
clk_disable()
imx_uart_thaw
clk_disable_unprepare()
imx_uart_freeze()
clk_prepare_enable()
imx_uart_suspend_noirq()
clk_disable()
imx_uart_resume_noirq()
clk_enable()
imx_uart_thaw
clk_disable_unprepare()CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/0a3160f4ffc70ee4bfa1521f698dace06e6091fd
- https://git.kernel.org/stable/c/4561d8008a467cb05ac632a215391d6b787f40aa
- https://git.kernel.org/stable/c/476b09e07bd519ec7ba5941a6a6f9a02256dbb21
- https://git.kernel.org/stable/c/ae22294e213a402a70fa1731538367d1b758ffe7
- https://git.kernel.org/stable/c/e3f9d87d6f0732827c443bd1474df21c2fad704b
- https://git.kernel.org/stable/c/e401312ca6e180ee1bd65f6a766e99dd40aa95e7
JSON original (NVD)
Mostrar
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: imx: Add missing .thaw_noirq hook\n\nThe following warning is seen with non-console UART instance when\nsystem hibernates.\n\n[ 37.371969] ------------[ cut here ]------------\n[ 37.376599] uart3_root_clk already disabled\n[ 37.380810] WARNING: CPU: 0 PID: 296 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0\n...\n[ 37.506986] Call trace:\n[ 37.509432] clk_core_disable+0xa4/0xb0\n[ 37.513270] clk_disable+0x34/0x50\n[ 37.516672] imx_uart_thaw+0x38/0x5c\n[ 37.520250] platform_pm_thaw+0x30/0x6c\n[ 37.524089] dpm_run_callback.constprop.0+0x3c/0xd4\n[ 37.528972] device_resume+0x7c/0x160\n[ 37.532633] dpm_resume+0xe8/0x230\n[ 37.536036] hibernation_snapshot+0x288/0x430\n[ 37.540397] hibernate+0x10c/0x2e0\n[ 37.543798] state_store+0xc4/0xd0\n[ 37.547203] kobj_attr_store+0x1c/0x30\n[ 37.550953] sysfs_kf_write+0x48/0x60\n[ 37.554619] kernfs_fop_write_iter+0x118/0x1ac\n[ 37.559063] new_sync_write+0xe8/0x184\n[ 37.562812] vfs_write+0x230/0x290\n[ 37.566214] ksys_write+0x68/0xf4\n[ 37.569529] __arm64_sys_write+0x20/0x2c\n[ 37.573452] invoke_syscall.constprop.0+0x50/0xf0\n[ 37.578156] do_el0_svc+0x11c/0x150\n[ 37.581648] el0_svc+0x30/0x140\n[ 37.584792] el0t_64_sync_handler+0xe8/0xf0\n[ 37.588976] el0t_64_sync+0x1a0/0x1a4\n[ 37.592639] ---[ end trace 56e22eec54676d75 ]---\n\nOn hibernating, pm core calls into related hooks in sequence like:\n\n .freeze\n .freeze_noirq\n .thaw_noirq\n .thaw\n\nWith .thaw_noirq hook being absent, the clock will be disabled in a\nunbalanced call which results the warning above.\n\n imx_uart_freeze()\n clk_prepare_enable()\n imx_uart_suspend_noirq()\n clk_disable()\n imx_uart_thaw\n clk_disable_unprepare()\n\nAdding the missing .thaw_noirq hook as imx_uart_resume_noirq() will have\nthe call sequence corrected as below and thus fix the warning.\n\n imx_uart_freeze()\n clk_prepare_enable()\n imx_uart_suspend_noirq()\n clk_disable()\n imx_uart_resume_noirq()\n clk_enable()\n imx_uart_thaw\n clk_disable_unprepare()"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: imx: Agregar el gancho .thaw_noirq faltante. La siguiente advertencia se ve con una instancia UART que no es de consola cuando el sistema hiberna. [ 37.371969] ------------[ cortar aquí ]------------ [ 37.376599] uart3_root_clk ya está deshabilitado [ 37.380810] ADVERTENCIA: CPU: 0 PID: 296 en drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0 ... [ 37.506986] Rastreo de llamadas: [ 37.509432] clk_core_disable+0xa4/0xb0 [ 37.513270] clk_disable+0x34/0x50 [ 37.516672] imx_uart_thaw+0x38/0x5c [ 37.520250] platform_pm_thaw+0x30/0x6c [ 37.524089] dpm_run_callback.constprop.0+0x3c/0xd4 [ 37.528972] device_resume+0x7c/0x160 [ 37.532633] dpm_resume+0xe8/0x230 [ 37.536036] hibernation_snapshot+0x288/0x430 [ 37.540397] hibernate+0x10c/0x2e0 [ 37.543798] state_store+0xc4/0xd0 [ 37.547203] kobj_attr_store+0x1c/0x30 [ 37.550953] sysfs_kf_write+0x48/0x60 [ 37.554619] kernfs_fop_write_iter+0x118/0x1ac [ 37.559063] new_sync_write+0xe8/0x184 [ 37.562812] vfs_write+0x230/0x290 [ 37.566214] ksys_write+0x68/0xf4 [ 37.569529] __arm64_sys_write+0x20/0x2c [ 37.573452] invoke_syscall.constprop.0+0x50/0xf0 [ 37.578156] do_el0_svc+0x11c/0x150 [ 37.581648] el0_svc+0x30/0x140 [ 37.584792] el0t_64_sync_handler+0xe8/0xf0 [ 37.588976] el0t_64_sync+0x1a0/0x1a4 [ 37.592639] ---[ end trace 56e22eec54676d75 ] Al hibernar, el núcleo pm llama a los ganchos relacionados en secuencia como: .freeze .freeze_noirq .thaw_noirq .thaw Si el gancho .thaw_noirq está ausente, el reloj se deshabilitará en una llamada desequilibrada que genera la advertencia anterior. imx_uart_freeze() clk_prepare_enable() imx_uart_suspend_noirq() clk_disable() imx_uart_thaw clk_disable_unprepare() Agregar el gancho .thaw_noirq faltante como imx_uart_resume_noirq() corregirá la secuencia de llamada como se muestra a continuación y, por lo tanto, solucionará la advertencia. imx_uart_freeze() clk_prepare_enable() imx_uart_suspend_noirq() clk_disable() imx_uart_resume_noirq() clk_enable() imx_uart_thaw clk_disable_unprepare()"
}
],
"lastModified": "2026-06-17T05:19:16.560",
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