CVE-2022-23042

Guest kernel crash via failed grant revocation

Published Mar 10, 2022 · Updated Aug 3, 2024

Denial of service in Linux netfront allows attackers controlling Xen PV backends to crash guest kernels via failed receive-path grant revocation. The receive path invokes BUG_ON when grant revocation fails, converting a backend-controlled error into a kernel crash instead of handling the failed return. The attack requires an attacker-controlled PV device backend and interrupts the targeted Linux guest.

CVSS severity7.0
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux netfront allows attackers controlling Xen PV backends to crash guest kernels via failed receive-path grant revocation. The receive path invokes BUG_ON when grant revocation fails, converting a backend-controlled error into a kernel crash instead of handling the failed return. The attack requires an attacker-controlled PV device backend and interrupts the targeted Linux guest.

The record

CVE
CVE-2022-23042
Published
Mar 10, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 10, 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 privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.4SUSEAV:L/AC:M/Au:N/C:P/I:P/A:P
7.0CanonicalCVSS:3.1/AV:L/AC:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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