CVE-2026-23041 (GCVE-0-2026-23041)
Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-02-09 08:37
VLAI?
Title
bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup
Summary
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.
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:
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)
Lines are against commit f8f9c1f4d0c7 ("Linux 6.19-rc3")
Fix this by clearing and unregistering ptp (bnxt_ptp_clear()) before
freeing HWRM resources.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
{
"containers": {
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"product": "Linux",
"programFiles": [
"drivers/net/ethernet/broadcom/bnxt/bnxt.c"
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"vulnerable": true
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"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-\u003ehwrm_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\u0027s .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-\u003ehwrm_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."
}
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"dateUpdated": "2026-02-09T08:37:36.153Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/0174d5466caefc22f03a36c43b2a3cce7e332627"
},
{
"url": "https://git.kernel.org/stable/c/3358995b1a7f9dcb52a56ec8251570d71024dad0"
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],
"title": "bnxt_en: Fix NULL pointer crash in bnxt_ptp_enable during error cleanup",
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"assignerShortName": "Linux",
"cveId": "CVE-2026-23041",
"datePublished": "2026-02-04T16:00:24.710Z",
"dateReserved": "2026-01-13T15:37:45.944Z",
"dateUpdated": "2026-02-09T08:37:36.153Z",
"state": "PUBLISHED"
},
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"nvd": "{\"cve\":{\"id\":\"CVE-2026-23041\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-04T16:16:19.563\",\"lastModified\":\"2026-02-04T16:33:44.537\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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-\u003ehwrm_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\u0027s .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-\u003ehwrm_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.\"}],\"metrics\":{},\"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\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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