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CVE-2023-52915— media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_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dvb-usb-v2驱动中的af9035_i2c_master_xfer函数对msg[i].buf未进行充分检查，当msg[i].buf为null且msg[i].len为零时，会导致空指针解引用错误。

AI Predicted 7.8 Difficulty: Easy EPSS 0.21% · P11

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< b2f54ed7739dfdf42c4df0a11131aad7c8635464 affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< fa58d9db5cad4bb7bb694b6837e3b96d87554f2b affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< b49c6e5dd236787f13a062ec528d724169f11152 affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< 6c01ef65de0b321b2db1ef9abf8f1d15862b937e affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< d9ef84a7c222497ecb5fdf93361c76931804825e affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< 0143f282b15f7cedc0392ea10050fb6000fd16e6 affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< 41b7181a40af84448a2b144fb02d8bf32b7e9a23 affected
7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273< 7bf744f2de0a848fb1d717f5831b03db96feae89 affected
… +10 more rows
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I. Basic Information for CVE-2023-52915

Vulnerability Information
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Vulnerability Title
media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer In af9035_i2c_master_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 af9035_i2c_master_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dvb-usb-v2驱动中的af9035_i2c_master_xfer函数对msg[i].buf未进行充分检查，当msg[i].buf为null且msg[i].len为零时，会导致空指针解引用错误。
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 7f882c2e353ca58695e9b4fcc9e97a9d4cbcf273 ~ b2f54ed7739dfdf42c4df0a11131aad7c8635464 -
Linux Linux 3.5 -

II. Public POCs for CVE-2023-52915

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III. Intelligence Information for CVE-2023-52915

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Patches & Fixes for CVE-2023-52915 (5)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52915

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