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CVE-2022-50382— padata: Always leave BHs disabled when running ->parallel()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在并行处理期间未禁用BHs，可能导致死锁。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 4611ce22468895acd61fee9ac1da810d60617d9a< 8e0681dd4eee029eb1d533d06993f7cb091efb73 affected
4611ce22468895acd61fee9ac1da810d60617d9a< 17afa98bccec4f52203508b3f49b5f948c6fd6ac affected
4611ce22468895acd61fee9ac1da810d60617d9a< 7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d affected
4611ce22468895acd61fee9ac1da810d60617d9a< 6cfa9e60c0f88fdec6368e081ab968411cc706b1 affected
4611ce22468895acd61fee9ac1da810d60617d9a< 34c3a47d20ae55b3600fed733bf96eafe9c500d5 affected
5.8 affected
< 5.8 unaffected
5.10.163≤ 5.10.* unaffected
… +4 more rows
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I. Basic Information for CVE-2022-50382

Vulnerability Information
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Vulnerability Title
padata: Always leave BHs disabled when running ->parallel()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在并行处理期间未禁用BHs，可能导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4611ce22468895acd61fee9ac1da810d60617d9a ~ 8e0681dd4eee029eb1d533d06993f7cb091efb73 -
Linux Linux 5.8 -

II. Public POCs for CVE-2022-50382

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III. Intelligence Information for CVE-2022-50382

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2023-53374 8.8 HIGH Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2023-53386 7.8 HIGH Bluetooth: Fix potential use-after-free when clear keys
CVE-2023-53394 7.8 HIGH net/mlx5e: xsk: Fix crash on regular rq reactivation
CVE-2022-50417 7.8 HIGH drm/panfrost: Fix GEM handle creation ref-counting
CVE-2023-53387 7.8 HIGH scsi: ufs: core: Fix device management cmd timeout flow
CVE-2023-53388 7.8 HIGH drm/mediatek: Clean dangling pointer on bind error path
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53377 7.8 HIGH cifs: prevent use-after-free by freeing the cfile later
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup
CVE-2023-53378 7.8 HIGH drm/i915/dpt: Treat the DPT BO as a framebuffer
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50382

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