CVE-2024-46771

Service interruption via leaked CAN BCM proc entries

Published Sep 18, 2024 · Updated Aug 5, 2026

Resource exhaustion in affected Linux kernel releases allows local users to interrupt service through crafted CAN BCM socket operations. bcm_notify() clears the socket's bound flag when its network device is removed, so a second bcm_connect() duplicates the proc name, clears bcm_proc_read, and leaks the original entry. Exploitation requires local low-privileged access and control of the CAN device-and-connect sequence; repetition consumes kernel resources and interrupts service.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected Linux kernel releases allows local users to interrupt service through crafted CAN BCM socket operations. bcm_notify() clears the socket's bound flag when its network device is removed, so a second bcm_connect() duplicates the proc name, clears bcm_proc_read, and leaks the original entry. Exploitation requires local low-privileged access and control of the CAN device-and-connect sequence; repetition consumes kernel resources and interrupts service.

The record

CVE
CVE-2024-46771
Published
Sep 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <10bfacbd5e8d821011d857bee73310457c9c989a
  3. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <33ed4ba73caae39f34ab874ba79138badc2c65dd
  4. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <3b39dc2901aa7a679a5ca981a3de9f8d5658afe8
  5. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <4377b79323df62eb5d310354f19b4d130ff58d50
  6. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <5c680022c4e28ba18ea500f3e29f0428271afa92
  7. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <76fe372ccb81b0c89b6cd2fec26e2f38c958be85
  8. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <abb0a615569ec008e8a93d9f3ab2d5b418ea94d4
  9. Affected versionversion=ffd980f976e7fd666c2e61bf8ab35107efd11828 <aec92dbebdbec7567d9f56d7c9296a572b8fd849

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.25; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <10bfacbd5e8d821011d857bee73310457c9c989a; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <33ed4ba73caae39f34ab874ba79138badc2c65dd; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <3b39dc2901aa7a679a5ca981a3de9f8d5658afe8; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <4377b79323df62eb5d310354f19b4d130ff58d50; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <5c680022c4e28ba18ea500f3e29f0428271afa92; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <76fe372ccb81b0c89b6cd2fec26e2f38c958be85; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <abb0a615569ec008e8a93d9f3ab2d5b418ea94d4; version=ffd980f976e7fd666c2e61bf8ab35107efd11828 <aec92dbebdbec7567d9f56d7c9296a572b8fd849

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/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 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

T1499.004Endpoint Denial of Service: Application 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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