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CVE-2026-31395 (GCVE-0-2026-31395)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-05-11 22:07
VLAI
Title
bnxt_en: fix OOB access in DBG_BUF_PRODUCER async event handler
Summary
In the Linux kernel, the following vulnerability has been resolved: bnxt_en: fix OOB access in DBG_BUF_PRODUCER async event handler The ASYNC_EVENT_CMPL_EVENT_ID_DBG_BUF_PRODUCER handler in bnxt_async_event_process() uses a firmware-supplied 'type' field directly as an index into bp->bs_trace[] without bounds validation. The 'type' field is a 16-bit value extracted from DMA-mapped completion ring memory that the NIC writes directly to host RAM. A malicious or compromised NIC can supply any value from 0 to 65535, causing an out-of-bounds access into kernel heap memory. The bnxt_bs_trace_check_wrap() call then dereferences bs_trace->magic_byte and writes to bs_trace->last_offset and bs_trace->wrapped, leading to kernel memory corruption or a crash. Fix by adding a bounds check and defining BNXT_TRACE_MAX as DBG_LOG_BUFFER_FLUSH_REQ_TYPE_ERR_QPC_TRACE + 1 to cover all currently defined firmware trace types (0x0 through 0xc).
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 84fcd9449fd7882ddfb05ba64d75f9be2d29b2e9 , < 19aa416eed9e4aaf1bbe8da0f7bd9a9be31158c8 (git)
Affected: 84fcd9449fd7882ddfb05ba64d75f9be2d29b2e9 , < b7c7a275447c6d4bf4a36a134682e2e4e20efd4b (git)
Affected: 84fcd9449fd7882ddfb05ba64d75f9be2d29b2e9 , < 64dcbde7f8f870a4f2d9daf24ffb06f9748b5dd3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "current_release_date": "2026-06-28T07:24:50+00:00",
      "cve": "CVE-2026-31395",
      "id": "CVE-2026-31395",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "184",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bnxt_en: fix OOB access in DBG_BUF_PRODUCER async event handler",
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      "current_release_date": "2026-09-11T01:32:53Z",
      "cve": "CVE-2026-31395",
      "id": "CVE-2026-31395",
      "initial_release_date": "2026-04-03T23:25:53Z",
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      "product_status:recommended": "256",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31395",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31395.json",
      "version": "11"
    }
  }
}



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