CVE-2026-98795
En el kernel de Linux se ha resuelto la siguiente vulnerabilidad:
net: sparx5: skip ptp deinit if init was skipped
sparx5_ptp_init() retorna antes de tiempo en las variantes base lan969x porque no tienen el indicador SPX5_FEATURE_PTP. También retorna antes de tiempo cuando no se describe ninguna interrupción "ptp". Al desvincular el controlador, se produce entonces una desreferencia de puntero NULL al limpiar las colas tx_skbs no inicializadas:
Antes de que se añadieran las colas tx_skbs por puerto, se habría producido una desreferencia NULL al llamar a ptp_clock_unregister() sobre los relojes PTP que nunca se registraron.
Leer descripción completaMostrar menos
Se corrige retornando antes de tiempo en sparx5_ptp_deinit() si PTP no está en uso.
Detalles técnicos trazas, registros y código del informe original
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000008
Call trace:
skb_queue_purge_reason+0x68/0x120 (P)
sparx5_ptp_deinit+0x64/0xc0
mchp_sparx5_remove+0x38/0x70
platform_remove+0x20/0x30
device_remove+0x4c/0x80Traducción automática del texto original de NVD (en inglés).
CVSS
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
- 0.17 %
- Percentil entre todas las CVEs puntuadas
- 5
- Fecha de la puntuación
- 20/10/2026
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
JSON original (NVD)
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{
"id": "CVE-2026-98795",
"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": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
"lessThan": "35c706d6eb1963735814c5f5bb2674a96eacf3cc",
"versionType": "git"
},
{
"status": "affected",
"version": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
"lessThan": "2879b65bfa548e10d59c5fba91d17f8a00cd7029",
"versionType": "git"
},
{
"status": "affected",
"version": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
"lessThan": "0d2c49915bc3aea4521cda5e4d42f24f63b94585",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:33.490",
"references": [
{
"url": "https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2879b65bfa548e10d59c5fba91d17f8a00cd7029",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/35c706d6eb1963735814c5f5bb2674a96eacf3cc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: skip ptp deinit if init was skipped\n\nsparx5_ptp_init() returns early on the base lan969x variants\nbecause they do not have the SPX5_FEATURE_PTP flag. It also returns early\nwhen no \"ptp\" interrupt is described. Unbinding the driver then causes a\nNULL pointer dereference when cleaning up uninitialized tx_skbs queues:\n\n Unable to handle kernel NULL pointer dereference at virtual address\n 0000000000000008\n Call trace:\n skb_queue_purge_reason+0x68/0x120 (P)\n sparx5_ptp_deinit+0x64/0xc0\n mchp_sparx5_remove+0x38/0x70\n platform_remove+0x20/0x30\n device_remove+0x4c/0x80\n\nBefore per-port tx_skbs were added, a NULL dereference would have happened\nwhen calling ptp_clock_unregister() on the never-registered PTP clocks.\n\nFix by returning early in sparx5_ptp_deinit() if PTP is not used."
}
],
"lastModified": "2026-10-19T10:19:43.517",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}