CVE-2025-37873

Kernel memory corruption via unmasked transmit ring index

Published May 9, 2025 · Updated Aug 5, 2026

Out-of-bounds write in the Linux kernel bnxt Ethernet transmit path from 6.8 allows local users to crash affected systems through transmit errors. The bnxt_start_xmit error path uses the free-running tx_prod value without applying tx_ring_mask before indexing transmit-ring memory. No remote packet parsing is involved; an unprivileged local user must transmit through a bnxt interface and induce a DMA-mapping or memory-pressure failure.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in the Linux kernel bnxt Ethernet transmit path from 6.8 allows local users to crash affected systems through transmit errors. The bnxt_start_xmit error path uses the free-running tx_prod value without applying tx_ring_mask before indexing transmit-ring memory. No remote packet parsing is involved; an unprivileged local user must transmit through a bnxt interface and induce a DMA-mapping or memory-pressure failure.

The record

CVE
CVE-2025-37873
Published
May 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 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=6.8
  2. Affected versionversion=6d1add95536bafe585c500ad8114af7ed4225a0f <12f2d033fae957d84c2c0ce604d2a077e61fa2c0
  3. Affected versionversion=6d1add95536bafe585c500ad8114af7ed4225a0f <21e70f694bc0dcb40174b0940cc52a7769fc19e0
  4. Affected versionversion=6d1add95536bafe585c500ad8114af7ed4225a0f <3742c55de00266fa7c8fd2c5d61a453d223a9cd1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=6d1add95536bafe585c500ad8114af7ed4225a0f <12f2d033fae957d84c2c0ce604d2a077e61fa2c0; version=6d1add95536bafe585c500ad8114af7ed4225a0f <21e70f694bc0dcb40174b0940cc52a7769fc19e0; version=6d1add95536bafe585c500ad8114af7ed4225a0f <3742c55de00266fa7c8fd2c5d61a453d223a9cd1

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Oracle LinuxCVSS: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

T1499.004Endpoint Denial of Service: Application 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo