Atomic-sleep warning via nested incompatible locks
Published Jun 18, 2025 · Updated May 23, 2026
Improper locking in Linux kernel PowerPC PCI code allows attackers to trigger an atomic-sleep warning via unspecified vectors. pcibios_alloc_controller() keeps hose_spinlock held while get_phb_number() calls of_alias_get_id(), which acquires the sleeping of_mutex. The condition occurs during PCI host-bridge allocation on some PowerPC systems; published records describe only the diagnostic warning and identify no data access or lasting service interruption.
Summary
What happened
Improper locking in Linux kernel PowerPC PCI code allows attackers to trigger an atomic-sleep warning via unspecified vectors. pcibios_alloc_controller() keeps hose_spinlock held while get_phb_number() calls of_alias_get_id(), which acquires the sleeping of_mutex. The condition occurs during PCI host-bridge allocation on some PowerPC systems; published records describe only the diagnostic warning and identify no data access or lasting service interruption.
The record
- CVE
- CVE-2022-50045
- Published
- Jun 18, 2025
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Jun 18, 2025CVE publishedPublication date reported by the CVE source.
- 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?
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- Affected versionversion=0fe1e96fef0a5c53b4c0d1500d356f3906000f81 <8d48562a2729742f767b0fdd994d6b2a56a49c63
- Affected versionversion=205826dcac3271ab04fb97d66f1b4f8219723259 <5db5ce0f1963c6c8275719a80cb65e9c98d32726
- Affected versionversion=3ec50b8a0128359ff4ad4061a75c3322d0ab6ac9 <ccb0a42d3f40c436295e0fef57ab613ae5b925a4
- Affected versionversion=47a8fe1b154aa6d836582365b1c70684af8597e4 <a868f771ee41c97a25a04b8c632a7f06689b307b
- Affected versionversion=5.10.137 <5.10.138
- Affected versionversion=5.15.61 <5.15.63
- Affected versionversion=5.18.18 <5.19
- Affected versionversion=5.19.2 <5.19.4
- Affected versionversion=a79e4395619c926ea7e828b2023c0fbe2776385b <6f75057c21eab12c6ccb7f06f859641a6edfab99
- Affected versionversion=e0274da3ac318296fed503422ccda98ce67e99cb
- Affected versionversion=ef0f4eeaba2463a77ac5a4e42c30717deb3c7b62 <1d9e75c3d8cdf7c96a94cb77450d4ee070279e6a
- Affected versionversion=f35c7f506fb96a23a1961c7314c5931ec8bc473e <90f195c01a2e8d8da6281791617e21109719c981
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
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