CVE-2026-43122

✕ Withdrawn — historical dataMEDIUMNVD 5.5
5.5CVSS
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: Update cpuidle driver check in __acpi_processor_start()

Commit 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle driver registration") moved the ACPI idle driver registration to acpi_processor_driver_init() and acpi_processor_power_init() does not register an idle driver any more.

Accordingly, the cpuidle driver check in __acpi_processor_start() needs to be updated to avoid calling acpi_processor_power_init() without a cpuidle driver, in which case the registration of the cpuidle device in that function would lead to a NULL pointer dereference in __cpuidle_register_device().

CVSS v3
5.5
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

Published

May 6, 2026

Last Modified

May 12, 2026

Advisory Details (3)

Auto-updated Jun 14, 2026
Fixed version listed under Patch Availability.
generic

ACPI: processor: Update cpuidle driver check in __acpi_processor_start() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6cfed39c2ce64ac024bbde458a9727105e0b8c66
generic

ACPI: processor: Update cpuidle driver check in __acpi_processor_start() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/68f38f648e4b5bed2aeadd2f711e25302e6490f8
generic

ACPI: processor: Update cpuidle driver check in __acpi_processor_start() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0089ce1c056aee547115bdc25c223f8f88c08498

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
linuxKernel @ 6.18.14 (fixes >=6.18.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 0× in last 7d / 2× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-30 09:41 UTCOSV refresh
  2. 2026-09-11 16:23 UTCOSV refresh
  3. 2026-08-23 20:17 UTCGHSA enrichment
  4. 2026-08-17 12:58 UTCGHSA enrichment
  5. 2026-08-14 14:50 UTCGHSA enrichment
  6. 2026-08-11 20:43 UTCGHSA enrichment
  7. 2026-08-09 02:37 UTCGHSA enrichment
  8. 2026-08-05 22:22 UTCGHSA enrichment
  9. 2026-08-02 05:10 UTCEG score recompute
  10. 2026-08-02 05:10 UTCGHSA enrichment
  11. 2026-07-23 03:13 UTCEG score recompute▼ 5.50
  12. 2026-07-20 22:32 UTCOSV refresh
  13. 2026-06-16 17:52 UTCEPSS rescore
  14. 2026-06-15 17:49 UTCEPSS rescore
  15. 2026-06-15 06:34 UTCGHSA enrichment
  16. 2026-06-14 07:43 UTCGHSA enrichment
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-13 00:44 UTCGHSA enrichment
  19. 2026-06-12 23:12 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
  21. 2026-06-11 20:41 UTCGHSA enrichment
  22. 2026-06-11 14:00 UTCEPSS rescore
  23. 2026-06-10 22:18 UTCEPSS rescore
  24. 2026-06-10 21:54 UTCGHSA enrichment
  25. 2026-06-10 13:22 UTCEPSS rescore
Show 43 more
  1. 2026-06-10 13:22 UTCEPSS rescore
  2. 2026-06-09 23:06 UTCGHSA enrichment
  3. 2026-06-09 00:05 UTCGHSA enrichment
  4. 2026-06-08 14:17 UTCEPSS rescore
  5. 2026-06-08 14:17 UTCEPSS rescore
  6. 2026-06-08 01:17 UTCGHSA enrichment
  7. 2026-06-07 15:25 UTCEPSS rescore
  8. 2026-06-07 15:25 UTCEPSS rescore
  9. 2026-06-07 02:30 UTCGHSA enrichment
  10. 2026-06-06 13:47 UTCEPSS rescore
  11. 2026-06-06 13:47 UTCEPSS rescore
  12. 2026-06-06 03:41 UTCGHSA enrichment
  13. 2026-06-05 22:47 UTCEPSS rescore
  14. 2026-06-05 06:10 UTCEPSS rescore
  15. 2026-06-05 06:10 UTCEPSS rescore
  16. 2026-06-05 04:53 UTCGHSA enrichment
  17. 2026-06-04 13:12 UTCEPSS rescore
  18. 2026-06-04 13:12 UTCEPSS rescore
  19. 2026-06-04 06:05 UTCGHSA enrichment
  20. 2026-06-03 07:17 UTCGHSA enrichment
  21. 2026-06-02 20:13 UTCEPSS rescore
  22. 2026-06-02 08:27 UTCGHSA enrichment
  23. 2026-06-01 13:52 UTCEPSS rescore
  24. 2026-06-01 13:52 UTCEPSS rescore
  25. 2026-06-01 09:39 UTCGHSA enrichment
  26. 2026-05-31 22:30 UTCEPSS rescore
  27. 2026-05-31 22:30 UTCEPSS rescore
  28. 2026-05-31 00:16 UTCEPSS rescore
  29. 2026-05-31 00:16 UTCEPSS rescore
  30. 2026-05-29 13:44 UTCEPSS rescore
  31. 2026-05-29 13:44 UTCEPSS rescore
  32. 2026-05-28 13:44 UTCEPSS rescore
  33. 2026-05-28 13:44 UTCEPSS rescore
  34. 2026-05-27 13:40 UTCEPSS rescore
  35. 2026-05-27 13:40 UTCEPSS rescore
  36. 2026-05-26 13:44 UTCEPSS rescore
  37. 2026-05-26 07:18 UTCEPSS rescore
  38. 2026-05-20 22:38 UTCEPSS rescore
  39. 2026-05-20 22:38 UTCEPSS rescore
  40. 2026-05-20 14:18 UTCEG score recompute
  41. 2026-05-20 14:18 UTCGHSA enrichment
  42. 2026-05-20 11:22 UTCEPSS rescore
  43. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43122?
CVE-2026-43122 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Update cpuidle driver check in acpiprocessorstart() Commit 7a8c994cbb2d ("ACPI: processor: idle: Optimize ACPI idle driver registration") moved the ACPI idle driver registration to acpiprocessordriverinit() and…
When was CVE-2026-43122 disclosed?
CVE-2026-43122 was first published on May 6, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43122 actively exploited?
CVE-2026-43122 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43122?
CVE-2026-43122 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43122?
A fixed version for CVE-2026-43122 is listed under Patch Availability on this page: update to the version listed for your package.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-43122

Explore →

Is Your Infrastructure Affected by CVE-2026-43122?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs