CVE-2022-48977Public exploit

System crash via uninitialized CAN device pointer

Published Oct 21, 2024 · Updated May 23, 2026

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system via CAN frames on TUN or bonding devices. The AF_CAN receive handlers trust an ARPHRD_CAN device type and dereference ml_priv without confirming that the CAN-private pointer was initialized. Local access is required; successful triggering causes an availability-only system crash without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system via CAN frames on TUN or bonding devices. The AF_CAN receive handlers trust an ARPHRD_CAN device type and dereference ml_priv without confirming that the CAN-private pointer was initialized. Local access is required; successful triggering causes an availability-only system crash without reported data disclosure or modification.

The record

CVE
CVE-2022-48977
Published
Oct 21, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=1a5751d58b14195f763b8c1d9ef33fb8a93e95e7 <c42221efb1159d6a3c89e96685ee38acdce86b6f
  2. Affected versionversion=4ac1feff6ea6495cbfd336f4438a6c6d140544a6 <3982652957e8d79ac32efcb725450580650a8644
  3. Affected versionversion=4e096a18867a5a989b510f6999d9c6b6622e8f7b <0acc442309a0a1b01bcdaa135e56e6398a49439c
  4. Affected versionversion=4e096a18867a5a989b510f6999d9c6b6622e8f7b <c142cba37de29f740a3852f01f59876af8ae462a
  5. Affected versionversion=4e096a18867a5a989b510f6999d9c6b6622e8f7b <fcc63f2f7ee3038d53216edd0d8291e57c752557
  6. Affected versionversion=5.10.28 <5.10.159
  7. Affected versionversion=5.11.12 <5.12
  8. Affected versionversion=5.12
  9. Affected versionversion=5.4.110 <5.4.227
  10. Affected versionversion=96340078d50a54f6a1252c62596bc44321c8bff9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1a5751d58b14195f763b8c1d9ef33fb8a93e95e7 <c42221efb1159d6a3c89e96685ee38acdce86b6f; version=4ac1feff6ea6495cbfd336f4438a6c6d140544a6 <3982652957e8d79ac32efcb725450580650a8644; version=4e096a18867a5a989b510f6999d9c6b6622e8f7b <0acc442309a0a1b01bcdaa135e56e6398a49439c; version=4e096a18867a5a989b510f6999d9c6b6622e8f7b <c142cba37de29f740a3852f01f59876af8ae462a; version=4e096a18867a5a989b510f6999d9c6b6622e8f7b <fcc63f2f7ee3038d53216edd0d8291e57c752557; version=5.10.28 <5.10.159; version=5.11.12 <5.12; version=5.12; version=5.4.110 <5.4.227; version=96340078d50a54f6a1252c62596bc44321c8bff9

Published CVSS scores

6.5SUSECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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

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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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

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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