CVE-2026-72113

Kernel use-after-free via stale CAN filter

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel CAN BCM component allows local users to leave a stale filter pointing at freed kernel state. bcm_release(), bcm_delete_rx_op(), and bcm_notifier() re-find an rx_op device by ifindex; if NETDEV_UNREGISTER removes that index first, can_rx_unregister() is skipped. Triggering requires local low-privilege access and winning the device-unregistration race, after which CAN processing can dereference freed operation or socket state.

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

What happened

Use-after-free in the Linux kernel CAN BCM component allows local users to leave a stale filter pointing at freed kernel state. bcm_release(), bcm_delete_rx_op(), and bcm_notifier() re-find an rx_op device by ifindex; if NETDEV_UNREGISTER removes that index first, can_rx_unregister() is skipped. Triggering requires local low-privilege access and winning the device-unregistration race, after which CAN processing can dereference freed operation or socket state.

The record

CVE
CVE-2026-72113
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
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=2.6.25
  2. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <04d23061bbf18d5d81022eb21e9d32e99d24468d
  3. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <633bda66fbf309f5de5e1ad6defe8e6b1d77a20f
  4. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <84aa4807816e405c1bf87114fc63e06d244281ef
  5. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <b024c21c9066f6957b7d4a8f2037e4b000c5e041
  6. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <d59948293ea34b6337ce2b5febab8510de70048c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.25; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <04d23061bbf18d5d81022eb21e9d32e99d24468d; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <633bda66fbf309f5de5e1ad6defe8e6b1d77a20f; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <84aa4807816e405c1bf87114fc63e06d244281ef; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <b024c21c9066f6957b7d4a8f2037e4b000c5e041; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <d59948293ea34b6337ce2b5febab8510de70048c

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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