CVE-2026-72118

Incorrect CAN statistics via unsynchronized counter updates

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the Linux kernel CAN BCM module allows local users to produce incorrect receive statistics through concurrent CAN frames. The bcm_rx_handler path updated receive statistics and frames_filtered in separate bcm_rx_update_lock sections, allowing one CPU to reset counters between another CPU's updates. Reachability requires an all-interface receive operation and simultaneous frame processing on different CPUs; the documented consequence is bogus, possibly negative, reduction percentages in procfs.

CVSS severity5.5
Medium
EPSS probability0.21%
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 kernel CAN BCM module allows local users to produce incorrect receive statistics through concurrent CAN frames. The bcm_rx_handler path updated receive statistics and frames_filtered in separate bcm_rx_update_lock sections, allowing one CPU to reset counters between another CPU's updates. Reachability requires an all-interface receive operation and simultaneous frame processing on different CPUs; the documented consequence is bogus, possibly negative, reduction percentages in procfs.

The record

CVE
CVE-2026-72118
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=2.6.25
  2. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <8104bcdb2612fdda95169ddc3b49747b2ff98d24
  3. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <8b2783172d92edd650de6006ebd1c800937021ab
  4. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <970caff5c1a63702c80e08d920256bcb5f88ecc5
  5. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <df47f07cdc801a6afe05a486b5a343c3e532a93c
  6. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <e6c24ba95fc3f1b5e1dcd28b1c6e59ef61a9daa5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.25; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <8104bcdb2612fdda95169ddc3b49747b2ff98d24; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <8b2783172d92edd650de6006ebd1c800937021ab; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <970caff5c1a63702c80e08d920256bcb5f88ecc5; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <df47f07cdc801a6afe05a486b5a343c3e532a93c; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <e6c24ba95fc3f1b5e1dcd28b1c6e59ef61a9daa5

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

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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