CVE-2026-23041
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup
When bnxt_init_one() fails during initialization (e.g., bnxt_init_int_mode returns -ENODEV), the error path calls bnxt_free_hwrm_resources() which destroys the DMA pool and sets bp->hwrm_dma_pool to NULL. Subsequently, bnxt_ptp_clear() is called, which invokes ptp_clock_unregister().
Since commit a60fc3294a37 ("ptp: rework ptp_clock_unregister() to disable events"), ptp_clock_unregister() now calls ptp_disable_all_events(), which in turn invokes the driver's .enable() callback (bnxt_ptp_enable()) to disable PTP events before completing the unregistration.
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bnxt_ptp_enable() attempts to send HWRM commands via bnxt_ptp_cfg_pin() and bnxt_ptp_cfg_event(), both of which call hwrm_req_init(). This function tries to allocate from bp->hwrm_dma_pool, causing a NULL pointer dereference:
Lines are against commit f8f9c1f4d0c7 ("Linux 6.19-rc3")
Fix this by clearing and unregistering ptp (bnxt_ptp_clear()) before freeing HWRM resources.
Detalles técnicos trazas, registros y código del informe original
bnxt_en 0000:01:00.0 (unnamed net_device) (uninitialized): bnxt_init_int_mode err: ffffffed KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Call Trace: __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72) bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517) ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66) ptp_clock_unregister (drivers/ptp/ptp_clock.c:518) bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134) bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889)
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: 6
- 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)
⚠ 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-2026-23041",
"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": "a60fc3294a377204664b5484e4a487fa124155da",
"lessThan": "0174d5466caefc22f03a36c43b2a3cce7e332627",
"versionType": "git"
},
{
"status": "affected",
"version": "a60fc3294a377204664b5484e4a487fa124155da",
"lessThan": "3358995b1a7f9dcb52a56ec8251570d71024dad0",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/bnxt/bnxt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.6",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/broadcom/bnxt/bnxt.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-02-04T16:16:19.563",
"references": [
{
"url": "https://git.kernel.org/stable/c/0174d5466caefc22f03a36c43b2a3cce7e332627",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3358995b1a7f9dcb52a56ec8251570d71024dad0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup\n\nWhen bnxt_init_one() fails during initialization (e.g.,\nbnxt_init_int_mode returns -ENODEV), the error path calls\nbnxt_free_hwrm_resources() which destroys the DMA pool and sets\nbp->hwrm_dma_pool to NULL. Subsequently, bnxt_ptp_clear() is called,\nwhich invokes ptp_clock_unregister().\n\nSince commit a60fc3294a37 (\"ptp: rework ptp_clock_unregister() to\ndisable events\"), ptp_clock_unregister() now calls\nptp_disable_all_events(), which in turn invokes the driver's .enable()\ncallback (bnxt_ptp_enable()) to disable PTP events before completing the\nunregistration.\n\nbnxt_ptp_enable() attempts to send HWRM commands via bnxt_ptp_cfg_pin()\nand bnxt_ptp_cfg_event(), both of which call hwrm_req_init(). This\nfunction tries to allocate from bp->hwrm_dma_pool, causing a NULL\npointer dereference:\n\n bnxt_en 0000:01:00.0 (unnamed net_device) (uninitialized): bnxt_init_int_mode err: ffffffed\n KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\n Call Trace:\n __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72)\n bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517)\n ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66)\n ptp_clock_unregister (drivers/ptp/ptp_clock.c:518)\n bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134)\n bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889)\n\nLines are against commit f8f9c1f4d0c7 (\"Linux 6.19-rc3\")\n\nFix this by clearing and unregistering ptp (bnxt_ptp_clear()) before\nfreeing HWRM resources."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbnxt_en: Corrección de un fallo por puntero NULL en bnxt_ptp_enable durante la limpieza de errores\n\nCuando bnxt_init_one() falla durante la inicialización (p. ej., bnxt_init_int_mode devuelve -ENODEV), la ruta de error llama a bnxt_free_hwrm_resources() que destruye el pool de DMA y establece bp->hwrm_dma_pool a NULL. Posteriormente, se llama a bnxt_ptp_clear(), que invoca a ptp_clock_unregister().\n\nDesde el commit a60fc3294a37 ('ptp: rework ptp_clock_unregister() to disable events'), ptp_clock_unregister() ahora llama a ptp_disable_all_events(), que a su vez invoca la función de callback .enable() del controlador (bnxt_ptp_enable()) para deshabilitar los eventos PTP antes de completar el desregistro.\n\nbnxt_ptp_enable() intenta enviar comandos HWRM a través de bnxt_ptp_cfg_pin() y bnxt_ptp_cfg_event(), ambas llaman a hwrm_req_init(). Esta función intenta asignar memoria de bp->hwrm_dma_pool, causando una desreferencia de puntero NULL:\n\n bnxt_en 0000:01:00.0 (net_device sin nombre) (no inicializado): bnxt_init_int_mode err: ffffffed\n KASAN: desreferencia de puntero nulo en el rango [0x0000000000000028-0x000000000000002f]\n Traza de Llamadas:\n __hwrm_req_init (drivers/net/ethernet/broadcom/bnxt/bnxt_hwrm.c:72)\n bnxt_ptp_enable (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:323 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:517)\n ptp_disable_all_events (drivers/ptp/ptp_chardev.c:66)\n ptp_clock_unregister (drivers/ptp/ptp_clock.c:518)\n bnxt_ptp_clear (drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c:1134)\n bnxt_init_one (drivers/net/ethernet/broadcom/bnxt/bnxt.c:16889)\n\nLas líneas son contra el commit f8f9c1f4d0c7 ('Linux 6.19-rc3')\n\nSolucione esto limpiando y desregistrando ptp (bnxt_ptp_clear()) antes de liberar los recursos HWRM."
}
],
"lastModified": "2026-06-17T10:20:45.650",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}