CVE-2026-89900
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
media: cec: core: Fix kmemleak due to missed rc_free_device() call
The commit dccc0c3ddf8f ("media: rc: fix race between unregister and urb/irq callbacks") removed the implicit call to rc_free_device() from rc_unregister_device(). However, the commit missed to remove the NULL assignment of adap->rc that is now causing rc_free_device() to never be called on an allocated rc device.
kmemleak reports following after e.g. dw-hdmi unbind:
Remove the assignment of adap->rc to NULL to let cec_delete_adapter() free the allocated rc device after last user of the cec device exits to fix the kmemleak.
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffff00010ac10000 (size 4096):
comm "kworker/u16:1", pid 39, jiffies 4294897739
hex dump (first 32 bytes):
20 23 4b 0a 01 00 ff ff 08 00 c1 0a 01 00 ff ff #K.............
08 00 c1 0a 01 00 ff ff 00 00 00 00 00 00 00 00 ................
backtrace (crc e11baccc):
kmemleak_alloc+0x38/0x44
__kmalloc_cache_noprof+0x4a8/0x5e0
rc_allocate_device+0x48/0x2a0
cec_allocate_adapter+0x3ac/0x800
dw_hdmi_cec_probe+0x264/0x634
platform_probe+0xc0/0x188
really_probe+0x4a4/0x8e0
__driver_probe_device+0x2f8/0x440
driver_probe_device+0x60/0x160
__device_attach_driver+0x1a0/0x2a0
bus_for_each_drv+0x100/0x1a0
__device_attach+0x174/0x350
device_initial_probe+0x90/0xb0
bus_probe_device+0x4c/0x120
device_add+0xdec/0x116c
platform_device_add+0x354/0x598CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
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: 4/10/2026
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/695063fc57574dd117b1bc750ca189cf03a2caad
- https://git.kernel.org/stable/c/954ee95a03b4d31d4505591bfaba02c24b75776b
- https://git.kernel.org/stable/c/a24ba0653f7154e671dc8d2bf64682ab2d042792
- https://git.kernel.org/stable/c/cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c
- https://git.kernel.org/stable/c/f28a8e1ba4d67a18e4662e5acefd5a4389322366
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-89900",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a7becb58f6b8a3a3efe5d3acfd52e2c107de6772",
"lessThan": "954ee95a03b4d31d4505591bfaba02c24b75776b",
"versionType": "git"
},
{
"status": "affected",
"version": "75977f5f5c4974c72bbedefbf09ad33ebbaa36f1",
"lessThan": "f28a8e1ba4d67a18e4662e5acefd5a4389322366",
"versionType": "git"
},
{
"status": "affected",
"version": "e250b672d40a9e0d97a8895cbb301248bea0fce6",
"lessThan": "695063fc57574dd117b1bc750ca189cf03a2caad",
"versionType": "git"
},
{
"status": "affected",
"version": "dccc0c3ddf8f16071736f98a7d6dd46a2d43e037",
"lessThan": "cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c",
"versionType": "git"
},
{
"status": "affected",
"version": "dccc0c3ddf8f16071736f98a7d6dd46a2d43e037",
"lessThan": "a24ba0653f7154e671dc8d2bf64682ab2d042792",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.143",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.93",
"lessThan": "6.12.110",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.35",
"lessThan": "6.18.51",
"versionType": "semver"
}
],
"programFiles": [
"drivers/media/cec/core/cec-core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/media/cec/core/cec-core.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-16T11:16:58.880",
"references": [
{
"url": "https://git.kernel.org/stable/c/695063fc57574dd117b1bc750ca189cf03a2caad",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/954ee95a03b4d31d4505591bfaba02c24b75776b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a24ba0653f7154e671dc8d2bf64682ab2d042792",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f28a8e1ba4d67a18e4662e5acefd5a4389322366",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cec: core: Fix kmemleak due to missed rc_free_device() call\n\nThe commit dccc0c3ddf8f (\"media: rc: fix race between unregister and\nurb/irq callbacks\") removed the implicit call to rc_free_device() from\nrc_unregister_device(). However, the commit missed to remove the NULL\nassignment of adap->rc that is now causing rc_free_device() to never be\ncalled on an allocated rc device.\n\nkmemleak reports following after e.g. dw-hdmi unbind:\n\nunreferenced object 0xffff00010ac10000 (size 4096):\n comm \"kworker/u16:1\", pid 39, jiffies 4294897739\n hex dump (first 32 bytes):\n 20 23 4b 0a 01 00 ff ff 08 00 c1 0a 01 00 ff ff #K.............\n 08 00 c1 0a 01 00 ff ff 00 00 00 00 00 00 00 00 ................\n backtrace (crc e11baccc):\n kmemleak_alloc+0x38/0x44\n __kmalloc_cache_noprof+0x4a8/0x5e0\n rc_allocate_device+0x48/0x2a0\n cec_allocate_adapter+0x3ac/0x800\n dw_hdmi_cec_probe+0x264/0x634\n platform_probe+0xc0/0x188\n really_probe+0x4a4/0x8e0\n __driver_probe_device+0x2f8/0x440\n driver_probe_device+0x60/0x160\n __device_attach_driver+0x1a0/0x2a0\n bus_for_each_drv+0x100/0x1a0\n __device_attach+0x174/0x350\n device_initial_probe+0x90/0xb0\n bus_probe_device+0x4c/0x120\n device_add+0xdec/0x116c\n platform_device_add+0x354/0x598\n\nRemove the assignment of adap->rc to NULL to let cec_delete_adapter()\nfree the allocated rc device after last user of the cec device exits to\nfix the kmemleak."
}
],
"lastModified": "2026-09-16T11:16:58.880",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}