CVE-2022-49010
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (coretemp) Check for null before removing sysfs attrs
If coretemp_add_core() gets an error then pdata->core_data[indx] is already NULL and has been kfreed. Don't pass that to sysfs_remove_group() as that will crash in sysfs_remove_group().
Fix this by checking for NULL first.
Detalles técnicos trazas, registros y código del informe original
[Shortened for readability] [91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label' <cpu offline> [91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188 [91855.165103] #PF: supervisor read access in kernel mode [91855.194506] #PF: error_code(0x0000) - not-present page [91855.224445] PGD 0 P4D 0 [91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI ... [91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80 ... [91855.796571] Call Trace: [91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp] [91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp] [91855.871107] cpuhp_invoke_callback+0x105/0x4b0 [91855.893432] cpuhp_thread_fun+0x8e/0x150 ...
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: 0.24%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 6/10/2026
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
- CWE-476
Referencias
- https://git.kernel.org/stable/c/070d5ea4a0592a37ad96ce7f7b6b024f90bb009f
- https://git.kernel.org/stable/c/280110db1a7d62ad635b103bafc3ae96e8bef75c
- https://git.kernel.org/stable/c/7692700ac818866d138a8de555130a6e70e6ac16
- https://git.kernel.org/stable/c/89eecabe6a47403237f45aafd7d24f93cb973653
- https://git.kernel.org/stable/c/a89ff5f5cc64b9fe7a992cf56988fd36f56ca82a
- https://git.kernel.org/stable/c/ae6c8b6e5d5628df1c475c0a8fca1465e205c95b
- https://git.kernel.org/stable/c/f06e0cd01eab954bd5f2190c9faa79bb5357e05b
- https://git.kernel.org/stable/c/fb503d077ff7b43913503eaf72995d1239028b99
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (coretemp) Check for null before removing sysfs attrs\n\nIf coretemp_add_core() gets an error then pdata->core_data[indx]\nis already NULL and has been kfreed. Don't pass that to\nsysfs_remove_group() as that will crash in sysfs_remove_group().\n\n[Shortened for readability]\n[91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label'\n<cpu offline>\n[91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188\n[91855.165103] #PF: supervisor read access in kernel mode\n[91855.194506] #PF: error_code(0x0000) - not-present page\n[91855.224445] PGD 0 P4D 0\n[91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI\n...\n[91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80\n...\n[91855.796571] Call Trace:\n[91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp]\n[91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp]\n[91855.871107] cpuhp_invoke_callback+0x105/0x4b0\n[91855.893432] cpuhp_thread_fun+0x8e/0x150\n...\n\nFix this by checking for NULL first."
},
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: hwmon: (coretemp) Verificar si hay valores nulos antes de eliminar los atributos de sysfs Si coretemp_add_core() obtiene un error, entonces pdata->core_data[indx] ya es NULL y se ha liberado. No pase eso a sysfs_remove_group() ya que eso bloqueará sysfs_remove_group(). [Abreviado para facilitar la lectura] [91854.020159] sysfs: no se puede crear un nombre de archivo duplicado '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label' [91855.126115] ERROR: desreferencia de puntero NULL del kernel, dirección: 0000000000000188 [91855.165103] #PF: acceso de lectura del supervisor en modo kernel [91855.194506] #PF: error_code(0x0000) - página no presente [91855.224445] PGD 0 P4D 0 [91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI ... [91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80 ... [91855.796571] Seguimiento de llamadas: [91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp] [91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp] [91855.871107] cpuhp_invoke_callback+0x105/0x4b0 [91855.893432] cpuhp_thread_fun+0x8e/0x150 ... Solucione esto comprobando primero si es NULL."
}
],
"lastModified": "2026-06-17T05:16:50.547",
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