CVE-2026-72116

CAN disruption and frame injection via stale operations

Published Aug 15, 2026 · Updated Aug 15, 2026

Improper resource cleanup in Linux allows local users to disrupt CAN processing and inject frames after removing a CAN device. bcm_notify() leaves cyclic transmit operations active after NETDEV_UNREGISTER, so their timers re-arm indefinitely; bcm_rx_setup() also skips re-registration when rx_reg_dev is null. Exploitation requires local CAN access and device removal, and can consume CPU, stop expected receive delivery, or send attacker-chosen frames through a later interface that reuses the stale index.

CVSS severity7.1
High
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

Improper resource cleanup in Linux allows local users to disrupt CAN processing and inject frames after removing a CAN device. bcm_notify() leaves cyclic transmit operations active after NETDEV_UNREGISTER, so their timers re-arm indefinitely; bcm_rx_setup() also skips re-registration when rx_reg_dev is null. Exploitation requires local CAN access and device removal, and can consume CPU, stop expected receive delivery, or send attacker-chosen frames through a later interface that reuses the stale index.

The record

CVE
CVE-2026-72116
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499, T1565.002
Attack vector
local
Privileges
Unavailable

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

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=2.6.25
  2. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <3b762c0d950383ab7a002686c9136b9aa55d2d70
  3. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <60d8a7942f4ed2d975207aaeba1adb576707e53d
  4. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <6be3e1fedf03eab36a2c09d755d1171287b2014b
  5. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <b31d0933509c5a35c0be5736a2ce8df0d1bf112c
  6. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <f749e4564952d60e96930c09f2be99955d07c22e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.25; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <3b762c0d950383ab7a002686c9136b9aa55d2d70; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <60d8a7942f4ed2d975207aaeba1adb576707e53d; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <6be3e1fedf03eab36a2c09d755d1171287b2014b; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <b31d0933509c5a35c0be5736a2ce8df0d1bf112c; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <f749e4564952d60e96930c09f2be99955d07c22e

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499Endpoint Denial of Service
T1565.002Transmitted Data Manipulation

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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