CVE-2022-50382

padata: Always leave BHs disabled when running ->parallel()

State: Published
Severity: 5.5 Medium
Published: Sep 18, 2025
Updated: May 11, 2026
Reserved: Sep 17, 2025

Description

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

padata: Always leave BHs disabled when running ->parallel()

A deadlock can happen when an overloaded system runs ->parallel() in the context of the current task:

padata_do_parallel ->parallel() pcrypt_aead_enc/dec padata_do_serial spin_lock(&reorder->lock) // BHs still enabled <interrupt> ... __do_softirq ... padata_do_serial spin_lock(&reorder->lock)

It's a bug for BHs to be on in _do_serial as Steffen points out, so ensure they're off in the "current task" case like they are in padata_parallel_worker to avoid this situation.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-667 Improper Locking

Affected Products

Product	Versions
LinuxLinux	4611ce22468895acd61fee9ac1da810d60617d9a to before 8e0681dd4eee029eb1d533d06993f7cb091efb73Affected 4611ce22468895acd61fee9ac1da810d60617d9a to before 17afa98bccec4f52203508b3f49b5f948c6fd6acAffected 4611ce22468895acd61fee9ac1da810d60617d9a to before 7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743dAffected 4611ce22468895acd61fee9ac1da810d60617d9a to before 6cfa9e60c0f88fdec6368e081ab968411cc706b1Affected 4611ce22468895acd61fee9ac1da810d60617d9a to before 34c3a47d20ae55b3600fed733bf96eafe9c500d5Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

4611ce22468895acd61fee9ac1da810d60617d9a to before 8e0681dd4eee029eb1d533d06993f7cb091efb73Affected
4611ce22468895acd61fee9ac1da810d60617d9a to before 17afa98bccec4f52203508b3f49b5f948c6fd6acAffected
4611ce22468895acd61fee9ac1da810d60617d9a to before 7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743dAffected
4611ce22468895acd61fee9ac1da810d60617d9a to before 6cfa9e60c0f88fdec6368e081ab968411cc706b1Affected
4611ce22468895acd61fee9ac1da810d60617d9a to before 34c3a47d20ae55b3600fed733bf96eafe9c500d5Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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