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CVE-2022-50481— cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()

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，该漏洞源于设备注册失败时未正确处理引用，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 14baf4d9c739e6e69150512d2eb23c71fffcc192< 96fba6fb95bdede80583c262ac185da09661f264 affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< 1ae581696b7a799afa39a664c4b721569643f58a affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< d775a1da5a52b4f4bb02f2707ba420d1bec48dbb affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< 60b2ed21a65f3f5318666ccd765c3507991370cf affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< 170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8 affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< e5021bbf11b024cc65ea1e84c377df484183be4b affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< b32559ee4e6667c5c3daf4ec5454c277d1f255d2 affected
14baf4d9c739e6e69150512d2eb23c71fffcc192< ab44c182353be101c3be9465e1d15d42130c53c4 affected
… +12 more rows
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I. Basic Information for CVE-2022-50481

Vulnerability Information
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Vulnerability Title
cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter() If device_register() fails in cxl_register_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device. As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.
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，该漏洞源于设备注册失败时未正确处理引用，可能导致空指针取消引用。
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 14baf4d9c739e6e69150512d2eb23c71fffcc192 ~ 96fba6fb95bdede80583c262ac185da09661f264 -
Linux Linux 4.6 -

II. Public POCs for CVE-2022-50481

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III. Intelligence Information for CVE-2022-50481

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Patches & Fixes for CVE-2022-50481 (9)

Same Patch Batch · Linux · 2025-10-04 · 144 CVEs total

CVE-2025-39932 9.8 CRITICAL smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
CVE-2025-39948 9.8 CRITICAL ice: fix Rx page leak on multi-buffer frames
CVE-2025-39946 9.8 CRITICAL tls: make sure to abort the stream if headers are bogus
CVE-2025-39933 9.4 CRITICAL smb: client: let recv_done verify data_offset, data_length and remaining_data_length
CVE-2025-39943 9.4 CRITICAL ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
CVE-2023-53600 9.1 CRITICAL tunnels: fix kasan splat when generating ipv4 pmtu error
CVE-2023-53615 8.8 HIGH scsi: qla2xxx: Fix deletion race condition
CVE-2025-39952 8.8 HIGH wifi: wilc1000: avoid buffer overflow in WID string configuration
CVE-2023-53589 8.8 HIGH wifi: iwlwifi: mvm: don't trust firmware n_channels
CVE-2023-53586 8.8 HIGH scsi: target: Fix multiple LUN_RESET handling
CVE-2022-50493 8.8 HIGH scsi: qla2xxx: Fix crash when I/O abort times out
CVE-2023-53598 8.4 HIGH bus: mhi: host: Range check CHDBOFF and ERDBOFF
CVE-2023-53566 7.8 HIGH netfilter: nft_set_rbtree: fix null deref on element insertion
CVE-2023-53536 7.8 HIGH blk-crypto: make blk_crypto_evict_key() more robust
CVE-2023-53560 7.8 HIGH tracing/histograms: Add histograms to hist_vars if they have referenced variables
CVE-2023-53559 7.8 HIGH ip_vti: fix potential slab-use-after-free in decode_session6
CVE-2023-53557 7.8 HIGH fprobe: Release rethook after the ftrace_ops is unregistered
CVE-2023-53537 7.8 HIGH f2fs: fix to avoid use-after-free for cached IPU bio
CVE-2023-53539 7.8 HIGH RDMA/rxe: Fix incomplete state save in rxe_requester
CVE-2023-53545 7.8 HIGH drm/amdgpu: unmap and remove csa_va properly

Showing top 20 of 144 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50481

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