CVE-2023-52915: media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer
First published: Fri Sep 06 2024(Updated: )
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()")
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <4.14.326 | |
| Linux Kernel | >=4.15<4.19.295 | |
| Linux Kernel | >=4.20<5.4.257 | |
| Linux Kernel | >=5.5<5.10.197 | |
| Linux Kernel | >=5.11<5.15.133 | |
| Linux Kernel | >=5.16<6.1.55 | |
| Linux Kernel | >=6.2<6.5.5 |
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Reference Links
- https://git.kernel.org/stable/c/b2f54ed7739dfdf42c4df0a11131aad7c8635464
- https://git.kernel.org/stable/c/fa58d9db5cad4bb7bb694b6837e3b96d87554f2b
- https://git.kernel.org/stable/c/b49c6e5dd236787f13a062ec528d724169f11152
- https://git.kernel.org/stable/c/6c01ef65de0b321b2db1ef9abf8f1d15862b937e
- https://git.kernel.org/stable/c/d9ef84a7c222497ecb5fdf93361c76931804825e
- https://git.kernel.org/stable/c/0143f282b15f7cedc0392ea10050fb6000fd16e6
- https://git.kernel.org/stable/c/41b7181a40af84448a2b144fb02d8bf32b7e9a23
- https://git.kernel.org/stable/c/7bf744f2de0a848fb1d717f5831b03db96feae89
Frequently Asked Questions
What is the severity of CVE-2023-52915?
CVE-2023-52915 has been classified as a low severity vulnerability in the Linux kernel.
How do I fix CVE-2023-52915?
To fix CVE-2023-52915, update your Linux kernel to a version higher than 4.14.326, 4.19.295, 5.4.257, 5.10.197, 5.15.133, 6.1.55, or 6.5.5.
Which Linux kernel versions are affected by CVE-2023-52915?
CVE-2023-52915 affects Linux kernel versions from 4.14.326 up to, but not including, certain versions of 6.5.5.
What component of the Linux kernel is impacted by CVE-2023-52915?
CVE-2023-52915 impacts the dvb-usb-v2 component in the Linux kernel.
What type of vulnerability is CVE-2023-52915?
CVE-2023-52915 is a null pointer dereference vulnerability in the af9035_i2c_master_xfer function.
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