CVE-2025-39810 (GCVE-0-2025-39810)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-16 13:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
bnxt_en: Fix memory corruption when FW resources change during ifdown
bnxt_set_dflt_rings() assumes that it is always called before any TC has
been created. So it doesn't take bp->num_tc into account and assumes
that it is always 0 or 1.
In the FW resource or capability change scenario, the FW will return
flags in bnxt_hwrm_if_change() that will cause the driver to
reinitialize and call bnxt_cancel_reservations(). This will lead to
bnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp->num_tc
may be greater than 1. This will cause bp->tx_ring[] to be sized too
small and cause memory corruption in bnxt_alloc_cp_rings().
Fix it by properly scaling the TX rings by bp->num_tc in the code
paths mentioned above. Add 2 helper functions to determine
bp->tx_nr_rings and bp->tx_nr_rings_per_tc.
References
Impacted products
{ "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "drivers/net/ethernet/broadcom/bnxt/bnxt.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "d00e98977ef519280b075d783653e2c492fffbb6", "status": "affected", "version": "ec5d31e3c15d5233b491400133c67f78a320062c", "versionType": "git" }, { "lessThan": "9ab6a9950f152e094395d2e3967f889857daa185", "status": "affected", "version": "ec5d31e3c15d5233b491400133c67f78a320062c", "versionType": "git" }, { "lessThan": "2747328ba2714f1a7454208dbbc1dc0631990b4a", "status": "affected", "version": "ec5d31e3c15d5233b491400133c67f78a320062c", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "drivers/net/ethernet/broadcom/bnxt/bnxt.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "5.4" }, { "lessThan": "5.4", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.45", "versionType": "semver" }, { "lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.5", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.17-rc4", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.45", "versionStartIncluding": "5.4", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.16.5", "versionStartIncluding": "5.4", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.17-rc4", "versionStartIncluding": "5.4", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Fix memory corruption when FW resources change during ifdown\n\nbnxt_set_dflt_rings() assumes that it is always called before any TC has\nbeen created. So it doesn\u0027t take bp-\u003enum_tc into account and assumes\nthat it is always 0 or 1.\n\nIn the FW resource or capability change scenario, the FW will return\nflags in bnxt_hwrm_if_change() that will cause the driver to\nreinitialize and call bnxt_cancel_reservations(). This will lead to\nbnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp-\u003enum_tc\nmay be greater than 1. This will cause bp-\u003etx_ring[] to be sized too\nsmall and cause memory corruption in bnxt_alloc_cp_rings().\n\nFix it by properly scaling the TX rings by bp-\u003enum_tc in the code\npaths mentioned above. Add 2 helper functions to determine\nbp-\u003etx_nr_rings and bp-\u003etx_nr_rings_per_tc." } ], "providerMetadata": { "dateUpdated": "2025-09-16T13:00:12.677Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/d00e98977ef519280b075d783653e2c492fffbb6" }, { "url": "https://git.kernel.org/stable/c/9ab6a9950f152e094395d2e3967f889857daa185" }, { "url": "https://git.kernel.org/stable/c/2747328ba2714f1a7454208dbbc1dc0631990b4a" } ], "title": "bnxt_en: Fix memory corruption when FW resources change during ifdown", "x_generator": { "engine": "bippy-1.2.0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2025-39810", "datePublished": "2025-09-16T13:00:12.677Z", "dateReserved": "2025-04-16T07:20:57.137Z", "dateUpdated": "2025-09-16T13:00:12.677Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2025-39810\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:15:53.543\",\"lastModified\":\"2025-09-18T13:43:34.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbnxt_en: Fix memory corruption when FW resources change during ifdown\\n\\nbnxt_set_dflt_rings() assumes that it is always called before any TC has\\nbeen created. So it doesn\u0027t take bp-\u003enum_tc into account and assumes\\nthat it is always 0 or 1.\\n\\nIn the FW resource or capability change scenario, the FW will return\\nflags in bnxt_hwrm_if_change() that will cause the driver to\\nreinitialize and call bnxt_cancel_reservations(). This will lead to\\nbnxt_init_dflt_ring_mode() calling bnxt_set_dflt_rings() and bp-\u003enum_tc\\nmay be greater than 1. This will cause bp-\u003etx_ring[] to be sized too\\nsmall and cause memory corruption in bnxt_alloc_cp_rings().\\n\\nFix it by properly scaling the TX rings by bp-\u003enum_tc in the code\\npaths mentioned above. Add 2 helper functions to determine\\nbp-\u003etx_nr_rings and bp-\u003etx_nr_rings_per_tc.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2747328ba2714f1a7454208dbbc1dc0631990b4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ab6a9950f152e094395d2e3967f889857daa185\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d00e98977ef519280b075d783653e2c492fffbb6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}" } }
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Sightings
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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