CVE-2026-72140

Service interruption via freed resource dereference

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the i2c-mlxbf driver in Linux allows local users to interrupt service when driver resource mapping fails. On that error path, mlxbf_i2c_init_resource() frees tmp_res and then reads tmp_res->io while constructing the returned error code. The flaw is confined to local driver initialization on systems using the affected I2C driver, and the published impact is limited to availability.

CVSS severity2.0
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Use-after-free in the i2c-mlxbf driver in Linux allows local users to interrupt service when driver resource mapping fails. On that error path, mlxbf_i2c_init_resource() frees tmp_res and then reads tmp_res->io while constructing the returned error code. The flaw is confined to local driver initialization on systems using the affected I2C driver, and the published impact is limited to availability.

The record

CVE
CVE-2026-72140
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

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=5.10
  2. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <5290a52533e09c38374963f4bb0b35121fe555c7
  3. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <6a108c9f5a81bb7b29dbb1398be0089655b6bfd2
  4. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <71356737a7a55c76fee847563e3d33f8e6dc6b6d
  5. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <b398cbbbb9dd76210682a8c9aabd34c5168800b9
  6. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <c4d9b6a0c9645366d9e4af8a6ac8347bd4c841aa
  7. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <ce960a1b2caa4ad08291f28d8bcf17ad5a864e54
  8. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <e6a395a71f4652261d09b572a03c96052662a056
  9. Affected versionversion=b5b5b32081cd206baa6e58cca7f112d9723785d6 <fb267770bf822064f510c9b46743f533d8fa8a5f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <5290a52533e09c38374963f4bb0b35121fe555c7; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <6a108c9f5a81bb7b29dbb1398be0089655b6bfd2; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <71356737a7a55c76fee847563e3d33f8e6dc6b6d; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <b398cbbbb9dd76210682a8c9aabd34c5168800b9; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <c4d9b6a0c9645366d9e4af8a6ac8347bd4c841aa; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <ce960a1b2caa4ad08291f28d8bcf17ad5a864e54; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <e6a395a71f4652261d09b572a03c96052662a056; version=b5b5b32081cd206baa6e58cca7f112d9723785d6 <fb267770bf822064f510c9b46743f533d8fa8a5f

Published CVSS scores

2.0SUSECVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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 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

No sourced classifications are available.

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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