CVE-2022-48769

Host crash via unsupported EFI runtime call

Published Jun 20, 2024 · Updated May 23, 2026

Denial of service in Linux allows local users on Apple x86 systems to crash the machine by triggering EFI variable operations. The EFI runtime path calls the EFI 2.0 QueryVariableInfo service before setting a variable, although Apple x86 firmware does not safely implement that runtime service. Reachability requires Linux running on Apple x86 hardware and local access able to invoke EFI variable services; the bounded consequence is a firmware crash that interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.22%
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 allows local users on Apple x86 systems to crash the machine by triggering EFI variable operations. The EFI runtime path calls the EFI 2.0 QueryVariableInfo service before setting a variable, although Apple x86 firmware does not safely implement that runtime service. Reachability requires Linux running on Apple x86 hardware and local access able to invoke EFI variable services; the bounded consequence is a firmware crash that interrupts the host.

The record

CVE
CVE-2022-48769
Published
Jun 20, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 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

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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=0c9673834740afdfa7c172b1b19c6b3ec5bc3907
  2. Affected versionversion=13fcf5d1c5fe491aeb0b0f34a46d88134432edb1
  3. Affected versionversion=3.2.32 <3.3
  4. Affected versionversion=3.4.14 <3.5
  5. Affected versionversion=3.5.7 <3.6
  6. Affected versionversion=3.6.2 <3.7
  7. Affected versionversion=3.7
  8. Affected versionversion=8e221a3c057d674e3c1cc4d1d8fe65ac4697104b
  9. Affected versionversion=b3ab8b31e8b3c1ff4971bd52d0c8ebde5cfbdb97
  10. Affected versionversion=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <3df52448978802ae15dcebf66beba1029df957b4
  11. Affected versionversion=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <a4085859411c825c321c9b55b8a9dc5a128a6684
  12. Affected versionversion=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <b0f1cc093bc2493ac259c53766fd2b800e085807
  13. Affected versionversion=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <f5390cd0b43c2e54c7cf5506c7da4a37c5cef746

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0c9673834740afdfa7c172b1b19c6b3ec5bc3907; version=13fcf5d1c5fe491aeb0b0f34a46d88134432edb1; version=3.2.32 <3.3; version=3.4.14 <3.5; version=3.5.7 <3.6; version=3.6.2 <3.7; version=3.7; version=8e221a3c057d674e3c1cc4d1d8fe65ac4697104b; version=b3ab8b31e8b3c1ff4971bd52d0c8ebde5cfbdb97; version=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <3df52448978802ae15dcebf66beba1029df957b4; version=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <a4085859411c825c321c9b55b8a9dc5a128a6684; version=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <b0f1cc093bc2493ac259c53766fd2b800e085807; version=d6cf86d8f23253225fe2a763d627ecf7dfee9dae <f5390cd0b43c2e54c7cf5506c7da4a37c5cef746

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/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

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 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 exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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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