CVE-2022-48997
Estado: AnalizadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
char: tpm: Protect tpm_pm_suspend with locks
Currently tpm transactions are executed unconditionally in tpm_pm_suspend() function, which may lead to races with other tpm accessors in the system.
Specifically, the hw_random tpm driver makes use of tpm_get_random(), and this function is called in a loop from a kthread, which means it's not frozen alongside userspace, and so can race with the work done during system suspend:
Fix this by calling tpm_try_get_ops(), which itself is a wrapper around tpm_chip_start(), but takes the appropriate mutex.
Leer descripción completaMostrar menos
[Jason: reworked commit message, added metadata]
Detalles técnicos trazas, registros y código del informe original
tpm tpm0: tpm_transmit: tpm_recv: error -52 tpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics CPU: 0 PID: 1 Comm: init Not tainted 6.1.0-rc5+ #135 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014 Call Trace: tpm_tis_status.cold+0x19/0x20 tpm_transmit+0x13b/0x390 tpm_transmit_cmd+0x20/0x80 tpm1_pm_suspend+0xa6/0x110 tpm_pm_suspend+0x53/0x80 __pnp_bus_suspend+0x35/0xe0 __device_suspend+0x10f/0x350
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.24%
- Percentil entre todas las CVEs puntuadas: 13
- 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/23393c6461422df5bf8084a086ada9a7e17dc2ba
- https://git.kernel.org/stable/c/25b78bf98b07ff5aceb9b1e24f72ec0236c5c053
- https://git.kernel.org/stable/c/4e0d6c687c925e27fd4bc78a2721d10acf5614d6
- https://git.kernel.org/stable/c/571b6bbbf54d835ea6120f65575cb55cd767e603
- https://git.kernel.org/stable/c/d699373ac5f3545243d3c73a1ccab77fdef8cec6
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nchar: tpm: Protect tpm_pm_suspend with locks\n\nCurrently tpm transactions are executed unconditionally in\ntpm_pm_suspend() function, which may lead to races with other tpm\naccessors in the system.\n\nSpecifically, the hw_random tpm driver makes use of tpm_get_random(),\nand this function is called in a loop from a kthread, which means it's\nnot frozen alongside userspace, and so can race with the work done\nduring system suspend:\n\n tpm tpm0: tpm_transmit: tpm_recv: error -52\n tpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics\n CPU: 0 PID: 1 Comm: init Not tainted 6.1.0-rc5+ #135\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014\n Call Trace:\n tpm_tis_status.cold+0x19/0x20\n tpm_transmit+0x13b/0x390\n tpm_transmit_cmd+0x20/0x80\n tpm1_pm_suspend+0xa6/0x110\n tpm_pm_suspend+0x53/0x80\n __pnp_bus_suspend+0x35/0xe0\n __device_suspend+0x10f/0x350\n\nFix this by calling tpm_try_get_ops(), which itself is a wrapper around\ntpm_chip_start(), but takes the appropriate mutex.\n\n[Jason: reworked commit message, added metadata]"
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: char: tpm: Proteger tpm_pm_suspend con bloqueos Actualmente, las transacciones tpm se ejecutan incondicionalmente en la función tpm_pm_suspend(), lo que puede generar ejecuciones con otros accesores tpm en el sistema. Específicamente, el controlador tpm hw_random hace uso de tpm_get_random(), y esta función se llama en un bucle desde un kthread, lo que significa que no está congelada junto con el espacio de usuario, y por lo tanto puede competir con el trabajo realizado durante la suspensión del sistema: tpm tpm0: tpm_transmit: tpm_recv: error -52 tpm tpm0: TPM_STS.x 0xff no válido, volcando pila para análisis forense CPU: 0 PID: 1 Comm: init No contaminado 6.1.0-rc5+ #135 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014 Rastreo de llamadas: tpm_tis_status.cold+0x19/0x20 tpm_transmit+0x13b/0x390 tpm_transmit_cmd+0x20/0x80 tpm1_pm_suspend+0xa6/0x110 tpm_pm_suspend+0x53/0x80 __pnp_bus_suspend+0x35/0xe0 __device_suspend+0x10f/0x350 Solucione este problema llamando a tpm_try_get_ops(), que es un contenedor de tpm_chip_start(), pero toma el mutex apropiado. [Jason: mensaje de confirmación rediseñado, metadatos agregados]"
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