CVE-2022-34494

Local system crash via duplicate RPMSG free

Published Jun 26, 2022 · Updated Aug 3, 2024

Double free in the Linux kernel before 5.18.4 allows local users to crash the system through a virtio RPMSG device-registration failure. When rpmsg_ctrldev_register_device fails, virtio_rpmsg_release_device frees vch, and rpmsg_virtio_add_ctrl_dev then frees the same allocation again. Reachability requires low-privileged local access and the affected virtio RPMSG registration error path; the resulting impact is a system crash.

CVSS severity5.5
Medium
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

Double free in the Linux kernel before 5.18.4 allows local users to crash the system through a virtio RPMSG device-registration failure. When rpmsg_ctrldev_register_device fails, virtio_rpmsg_release_device frees vch, and rpmsg_virtio_add_ctrl_dev then frees the same allocation again. Reachability requires low-privileged local access and the affected virtio RPMSG registration error path; the resulting impact is a system crash.

The record

CVE
CVE-2022-34494
Published
Jun 26, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.9NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:C
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Ubuntu Security TeamCVSS: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

CWE-415Double Free
T1499.004Application 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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