CVE-2022-49275

Local privilege escalation via M_CAN use-after-free

Published Feb 26, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel M_CAN driver allows local users to gain kernel privileges through a configured CAN interface. The M_CAN 3.0.x m_can_tx_handler() path calls can_put_echo_skb(), which clones and frees the socket buffer before later reads of its length and data. An unprivileged local process can trigger the deterministic flaw by sending AF_CAN frames when an M_CAN interface is already up with CAN FD enabled, enabling kernel privilege escalation or a kernel panic.

CVSS severity7.8
High
EPSS probability0.28%
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 M_CAN driver allows local users to gain kernel privileges through a configured CAN interface. The M_CAN 3.0.x m_can_tx_handler() path calls can_put_echo_skb(), which clones and frees the socket buffer before later reads of its length and data. An unprivileged local process can trigger the deterministic flaw by sending AF_CAN frames when an M_CAN interface is already up with CAN FD enabled, enabling kernel privilege escalation or a kernel panic.

The record

CVE
CVE-2022-49275
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=3.18
  2. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <08d90846e438ac22dc56fc49ec0b0d195831c5ed
  3. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <2e8e79c416aae1de224c0f1860f2e3350fa171f8
  4. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <31417073493f302d26ab66b3abc098d43227b835
  5. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <4db7d6f481990dd179a9ee7126dc7aa31ea4fff3
  6. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <7728d937ec403a1ceff9483023252d2cb8777f81
  7. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <869016a2938ac44f7b2fb7fc22c89edad99eb9b3
  8. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <d3892a747ab16b1eb6593a19d29f62c3b3f020ac
  9. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <d93ed9aff64968f4cdad690712eb4f48ae537bde
  10. Affected versionversion=80646733f11c2e9de3b6339f7e635047e6087280 <f43e64076ff1b1dcb893fb77ad1204105f710a29

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=80646733f11c2e9de3b6339f7e635047e6087280 <08d90846e438ac22dc56fc49ec0b0d195831c5ed; version=80646733f11c2e9de3b6339f7e635047e6087280 <2e8e79c416aae1de224c0f1860f2e3350fa171f8; version=80646733f11c2e9de3b6339f7e635047e6087280 <31417073493f302d26ab66b3abc098d43227b835; version=80646733f11c2e9de3b6339f7e635047e6087280 <4db7d6f481990dd179a9ee7126dc7aa31ea4fff3; version=80646733f11c2e9de3b6339f7e635047e6087280 <7728d937ec403a1ceff9483023252d2cb8777f81; version=80646733f11c2e9de3b6339f7e635047e6087280 <869016a2938ac44f7b2fb7fc22c89edad99eb9b3; version=80646733f11c2e9de3b6339f7e635047e6087280 <d3892a747ab16b1eb6593a19d29f62c3b3f020ac; version=80646733f11c2e9de3b6339f7e635047e6087280 <d93ed9aff64968f4cdad690712eb4f48ae537bde; version=80646733f11c2e9de3b6339f7e635047e6087280 <f43e64076ff1b1dcb893fb77ad1204105f710a29

Published CVSS scores

7.8CISA ADPCVSS: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 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

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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