CVE-2026-72158

System crash via oversized FPGA parameter copy

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds memory access in Linux 6.3 and later allows attackers with a malicious FPGA device to crash the system. dfh_get_param_size() increments the DFHv1 parameter size after its loop-bound check and returns an oversized value when EOP is set, causing create_feature_instance() to copy beyond the mapped feature region. Exploitation requires the affected DFL driver and crafted headers from an attached FPGA; the reported consequence is limited to a system crash.

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 Linux 6.3 and later allows attackers with a malicious FPGA device to crash the system. dfh_get_param_size() increments the DFHv1 parameter size after its loop-bound check and returns an oversized value when EOP is set, causing create_feature_instance() to copy beyond the mapped feature region. Exploitation requires the affected DFL driver and crafted headers from an attached FPGA; the reported consequence is limited to a system crash.

The record

CVE
CVE-2026-72158
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-805, T1499.004
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68
  2. Affected versionversion=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <3b622aa447cf26104f96a8be39539367863bc6b6
  3. Affected versionversion=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a
  4. Affected versionversion=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <b2f6220e929b2a43605331d0139e65dc1640c05c
  5. Affected versionversion=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <f3df5386e3bb54626c117bd85e0158d45fb4aea9
  6. Affected versionversion=6.3

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68; version=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <3b622aa447cf26104f96a8be39539367863bc6b6; version=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a; version=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <b2f6220e929b2a43605331d0139e65dc1640c05c; version=4747ab89b4a652f835494fcf8342aaa0efb9b0fd <f3df5386e3bb54626c117bd85e0158d45fb4aea9; version=6.3

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.6Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-805Buffer Access with Incorrect Length Value
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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