CVE-2025-37911

Kernel crash via oversized firmware DMA copy

Published May 20, 2025 · Updated Aug 5, 2026

Out-of-bounds memory access in the Linux bnxt_en driver allows local users to crash the kernel through an ethtool firmware coredump request. In bnxt_hwrm_dbg_dma_data(), the driver copies a firmware-DMAed segment list into info->dest_buf using a firmware-reported length without limiting it to the allocated destination size. Reachability requires local access to a system with a bnxt_en-managed adapter and permission to issue the coredump ioctl; the reported consequence is kernel memory corruption and loss of availability.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in the Linux bnxt_en driver allows local users to crash the kernel through an ethtool firmware coredump request. In bnxt_hwrm_dbg_dma_data(), the driver copies a firmware-DMAed segment list into info->dest_buf using a firmware-reported length without limiting it to the allocated destination size. Reachability requires local access to a system with a bnxt_en-managed adapter and permission to issue the coredump ioctl; the reported consequence is kernel memory corruption and loss of availability.

The record

CVE
CVE-2025-37911
Published
May 20, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.19.95 <4.20
  2. Affected versionversion=4bf973a1f84aefb64750bdb3afe72d54de3199d7
  3. Affected versionversion=5.4.8 <5.5
  4. Affected versionversion=5.5
  5. Affected versionversion=a76837dd731b68cc3b5690470bc9efa2a8e3801a
  6. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <43292b83424158fa6ec458799f3cb9c54d18c484
  7. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <44807af79efd0d78fa36383dd865ddfe7992c0a6
  8. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <44d81a9ebf0cad92512e0ffdf7412bfe20db66ec
  9. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <4d69864915a3a052538e4ba76cd6fd77cfc64ebe
  10. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <69b10dd23ab826d0c7f2d9ab311842251978d0c1
  11. Affected versionversion=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <6b87bd94f34370bbf1dfa59352bed8efab5bf419

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19.95 <4.20; version=4bf973a1f84aefb64750bdb3afe72d54de3199d7; version=5.4.8 <5.5; version=5.5; version=a76837dd731b68cc3b5690470bc9efa2a8e3801a; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <43292b83424158fa6ec458799f3cb9c54d18c484; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <44807af79efd0d78fa36383dd865ddfe7992c0a6; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <44d81a9ebf0cad92512e0ffdf7412bfe20db66ec; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <4d69864915a3a052538e4ba76cd6fd77cfc64ebe; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <69b10dd23ab826d0c7f2d9ab311842251978d0c1; version=c74751f4c39232c31214ec6a3bc1c7e62f5c728b <6b87bd94f34370bbf1dfa59352bed8efab5bf419

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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