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CVE-2022-50317— drm/bridge: megachips: Fix a null pointer dereference bug

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，该漏洞源于未初始化对象移除操作，可能导致空指针取消引用。

AI Predicted 3.3 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux 7649972d97fb98578fbc4a351416cf72895e7c4d< aaa512ad1e59f2edf8a9e4f2b167a44b24670679 affected
16e3827904932eccfba0915f0c93b519de3536ac< 5bc20bafcd87ba0858ab772cefc7047cb51bc249 affected
50ad94f8654a53ec9ca3604a7a23cbaf166e0119< 1daf69228e310938177119c4eadcd30fc75c81e0 affected
b8d10f601f226f055df8b5368d7ea7f369136cd5< 877e92e9b1bdeb580b31a46061005936be902cd4 affected
405856460d3e7aefb7c1aef047ec88fc4ef2e2a5< 4610e7a4111fa3f3ce27c09d6d94008c55f1cd31 affected
11632d4aa2b3f126790e81a4415d6c23103cf8bb< 21764467ab396d9f08921e0a5ffa1214244e1ad9 affected
11632d4aa2b3f126790e81a4415d6c23103cf8bb< 7371fad5cfe6eada6bb5523c895fd6074b15c2b9 affected
11632d4aa2b3f126790e81a4415d6c23103cf8bb< 1ff673333d46d2c1b053ebd0c1c7c7c79e36943e affected
… +17 more rows
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I. Basic Information for CVE-2022-50317

Vulnerability Information
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Vulnerability Title
drm/bridge: megachips: Fix a null pointer dereference bug
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: megachips: Fix a null pointer dereference bug When removing the module we will get the following warning: [ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0 The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized. Fix this by checking whether both the bridges are probed.
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，该漏洞源于未初始化对象移除操作，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 7649972d97fb98578fbc4a351416cf72895e7c4d ~ aaa512ad1e59f2edf8a9e4f2b167a44b24670679 -
Linux Linux 5.17 -

II. Public POCs for CVE-2022-50317

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III. Intelligence Information for CVE-2022-50317

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Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

CVE-2022-50235 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READDIR
CVE-2022-50335 9.8 CRITICAL 9p: set req refcount to zero to avoid uninitialized usage
CVE-2023-53192 9.8 CRITICAL vxlan: Fix nexthop hash size
CVE-2023-53253 8.8 HIGH HID: nvidia-shield: Reference hid_device devm allocation of input_dev name
CVE-2023-53226 8.8 HIGH wifi: mwifiex: Fix OOB and integer underflow when rx packets
CVE-2022-50241 8.8 HIGH NFSD: fix use-after-free on source server when doing inter-server copy
CVE-2023-53194 8.4 HIGH fs/ntfs3: Add length check in indx_get_root
CVE-2023-53213 8.1 HIGH wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()
CVE-2023-53186 8.1 HIGH skbuff: Fix a race between coalescing and releasing SKBs
CVE-2023-53254 7.8 HIGH cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
CVE-2023-53219 7.8 HIGH media: netup_unidvb: fix use-after-free at del_timer()
CVE-2023-53252 7.8 HIGH Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
CVE-2023-53170 7.8 HIGH net: dsa: Removed unneeded of_node_put in felix_parse_ports_node
CVE-2023-53176 7.8 HIGH serial: 8250: Reinit port->pm on port specific driver unbind
CVE-2023-53178 7.8 HIGH mm: fix zswap writeback race condition
CVE-2023-53179 7.8 HIGH netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c
CVE-2022-50315 7.8 HIGH ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS
CVE-2023-53184 7.8 HIGH arm64/sme: Set new vector length before reallocating
CVE-2023-53187 7.8 HIGH btrfs: fix use-after-free of new block group that became unused
CVE-2025-39800 7.8 HIGH btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()

Showing top 20 of 210 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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