CVE-2022-36648Public exploit

Guest-triggered host crash via unchecked Rocker TLVs

Published Aug 22, 2023 · Updated Oct 3, 2024

NULL pointer dereference in QEMU 7.0.0 and earlier allows guest OS users to crash the host through a malformed Rocker command. The of_dpa_cmd_add_l2_flood function trusts rocker_tlv_parse_nested output and dereferences a missing group-ID TLV pointer instead of rejecting malformed data. The Rocker device must be explicitly configured and reachable from a guest; QEMU maintainers dispute security treatment because Rocker is intended for trusted development environments.

CVSS severity10.0
Critical
EPSS probability1.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in QEMU 7.0.0 and earlier allows guest OS users to crash the host through a malformed Rocker command. The of_dpa_cmd_add_l2_flood function trusts rocker_tlv_parse_nested output and dereferences a missing group-ID TLV pointer instead of rejecting malformed data. The Rocker device must be explicitly configured and reachable from a guest; QEMU maintainers dispute security treatment because Rocker is intended for trusted development environments.

The record

CVE
CVE-2022-36648
Published
Aug 22, 2023
Updated
Oct 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 3, 2024Record 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?

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

7.0SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo