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CVE-2023-53220— media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()

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，该漏洞源于未检查msg[i].len，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P5

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux caa1a700ed2a06a831e6a7db5d9f213fc63caee3< c6763fefa267f6e62595a6ac1f57815d99fc90b7 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< adcb73f8ce9aec48b1f85223f401c1574015d8d2 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< 991c77fe18c6f374bbf83376f8c42550aa565662 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< a9def3e9718a4dc756f48db147d42ec41a966240 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< 5b1ea100ad3695025969dc4693f307877fb688d6 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< 6ab7ea4e17d6a605d05308adf8f3408924770cba affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< a1110f19d4940e4185251d072cbb0ff51486a1e7 affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3< 1047f9343011f2cedc73c64829686206a7e9fc3f affected
… +10 more rows
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I. Basic Information for CVE-2023-53220

Vulnerability Information
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Vulnerability Title
media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: az6007: Fix null-ptr-deref in az6007_i2c_xfer() In az6007_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach az6007_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")
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，该漏洞源于未检查msg[i].len，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 caa1a700ed2a06a831e6a7db5d9f213fc63caee3 ~ c6763fefa267f6e62595a6ac1f57815d99fc90b7 -
Linux Linux 3.4 -

II. Public POCs for CVE-2023-53220

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III. Intelligence Information for CVE-2023-53220

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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-2022-50310 7.8 HIGH ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed
CVE-2023-53254 7.8 HIGH cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
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-2023-53184 7.8 HIGH arm64/sme: Set new vector length before reallocating
CVE-2022-50315 7.8 HIGH ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS
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

V. Comments for CVE-2023-53220

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