CVE-2024-26859

System crash via concurrent SGE release

Published Apr 17, 2024 · Updated May 12, 2026

Race condition in the Linux bnx2x driver allows local users to crash affected systems during PCI EEH error recovery. bnx2x_nic_unload and bnx2x_io_slot_reset can concurrently release the same receive SGE, leaving bnx2x_free_rx_sge to read a page pointer cleared after dma_unmap_page. Exploitation requires local access, a bnx2x network device, and overlapping transmit-timeout and EEH reset processing; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux bnx2x driver allows local users to crash affected systems during PCI EEH error recovery. bnx2x_nic_unload and bnx2x_io_slot_reset can concurrently release the same receive SGE, leaving bnx2x_free_rx_sge to read a page pointer cleared after dma_unmap_page. Exploitation requires local access, a bnx2x network device, and overlapping transmit-timeout and EEH reset processing; the bounded consequence is a kernel crash.

The record

CVE
CVE-2024-26859
Published
Apr 17, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-20, CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=4.2; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <3a9f78b297e08ca8e88ae3ecff1f6fe2766dc5eb; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <44f9f1abb0ecc43023225ab9539167facbabf0ec; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <4f37d3a7e004bbf560c21441ca9c022168017ec4; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <7bcc090c81116c66936a7415f2c6b1483a4bcfd9; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <8eebff95ce9558be66a36aa7cfb43223f3ab4699; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <8ffcd3ccdbda0c918c4a0f922ef1c17010f1b598; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <c51f8b6930db3f259b8820b589f2459d2df3fc68; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <cf7d8cba639ae792a42c2a137b495eac262ac36c; version=4cace675d687ebd2d813e90af80ff87ee85202f9 <d27e2da94a42655861ca4baea30c8cd65546f25d

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7NVDCVSS:3.1/AV:L/AC:H/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-20Improper Input Validation
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

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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