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CVE-2022-50359— media: cx88: Fix a null-ptr-deref bug in buffer_prepare()

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cx88_risc_buffer函数调用失败时未处理空缓冲区，可能导致空指针取消引用。

AI Predicted 4.3 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 10c99d1c46ea9cd940029e17bab11d021f315c21 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4befc7ffa18ef9a4b70d854465313a345a06862f affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9181af2dbf06e7f432e5dbe88d10b22343e851b9 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c2257c8a501537afab276c306cb717b7260276e1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6f21976095c1e92454ab030976f95f40d652351b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 704838040f3bdb4aa07ff4f26505a666a3defcfe affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 644d5a87ab1863eb606526ea743021752a17e9cb affected
… +12 more rows
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I. Basic Information for CVE-2022-50359

Vulnerability Information
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Vulnerability Title
media: cx88: Fix a null-ptr-deref bug in buffer_prepare()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: cx88: Fix a null-ptr-deref bug in buffer_prepare() When the driver calls cx88_risc_buffer() to prepare the buffer, the function call may fail, resulting in a empty buffer and null-ptr-deref later in buffer_queue(). The following log can reveal it: [ 41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI [ 41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 41.828027] RIP: 0010:buffer_queue+0xc2/0x500 [ 41.836311] Call Trace: [ 41.836945] __enqueue_in_driver+0x141/0x360 [ 41.837262] vb2_start_streaming+0x62/0x4a0 [ 41.838216] vb2_core_streamon+0x1da/0x2c0 [ 41.838516] __vb2_init_fileio+0x981/0xbc0 [ 41.839141] __vb2_perform_fileio+0xbf9/0x1120 [ 41.840072] vb2_fop_read+0x20e/0x400 [ 41.840346] v4l2_read+0x215/0x290 [ 41.840603] vfs_read+0x162/0x4c0 Fix this by checking the return value of cx88_risc_buffer() [hverkuil: fix coding style issues]
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cx88_risc_buffer函数调用失败时未处理空缓冲区，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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2022-50359

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III. Intelligence Information for CVE-2022-50359

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Same Patch Batch · Linux · 2025-09-17 · 56 CVEs total

CVE-2023-53338 9.8 CRITICAL lwt: Fix return values of BPF xmit ops
CVE-2023-53360 9.8 CRITICAL NFSv4.2: Rework scratch handling for READ_PLUS (again)
CVE-2022-50363 9.8 CRITICAL skmsg: pass gfp argument to alloc_sk_msg()
CVE-2022-50373 9.8 CRITICAL fs: dlm: fix race in lowcomms
CVE-2023-53358 8.8 HIGH ksmbd: fix racy issue under cocurrent smb2 tree disconnect
CVE-2022-50368 7.8 HIGH drm/msm/dsi: fix memory corruption with too many bridges
CVE-2022-50367 7.8 HIGH fs: fix UAF/GPF bug in nilfs_mdt_destroy
CVE-2023-53340 7.8 HIGH net/mlx5: Collect command failures data only for known commands
CVE-2022-50362 7.8 HIGH dmaengine: hisilicon: Add multi-thread support for a DMA channel
CVE-2023-53354 7.8 HIGH skbuff: skb_segment, Call zero copy functions before using skbuff frags
CVE-2022-50355 7.8 HIGH staging: vt6655: fix some erroneous memory clean-up loops
CVE-2022-50354 7.8 HIGH drm/amdkfd: Fix kfd_process_device_init_vm error handling
CVE-2022-50365 7.5 HIGH skbuff: Account for tail adjustment during pull operations
CVE-2023-53335 7.5 HIGH RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()
CVE-2022-50374 Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
CVE-2022-50353 mmc: wmt-sdmmc: fix return value check of mmc_add_host()
CVE-2023-53337 nilfs2: do not write dirty data after degenerating to read-only
CVE-2022-50372 cifs: Fix memory leak when build ntlmssp negotiate blob failed
CVE-2022-50371 led: qcom-lpg: Fix sleeping in atomic
CVE-2023-53336 media: ipu-bridge: Fix null pointer deref on SSDB/PLD parsing warnings

Showing top 20 of 56 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50359

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