# CVE-2023-54314: media: af9005: Fix null-ptr-deref in af9005\_i2c\_xfer

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-30 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.23

## Description

In the Linux kernel, the following vulnerability has been resolved: media: af9005: Fix null-ptr-deref in af9005_i2c_xfer In af9005_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 af9005_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()")

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/98c12abb275b75a98ff62de9466d21e4daa98536
- https://git.kernel.org/stable/c/63d962ac7a52c0ff4cd09af2e284dce5e5955dfe
- https://git.kernel.org/stable/c/0c02eb70b1dd4ae9bb304ce6cdadbc6faba2b2e9
- https://git.kernel.org/stable/c/c7e5ac737db25d7387fe517cb5207706782b6cf8
- https://git.kernel.org/stable/c/033b0c0780adee32dde218179e9bc51d2525108f
- https://git.kernel.org/stable/c/abb6fd93e05e80668d2317fe1110bc99b05034c3
- https://git.kernel.org/stable/c/e595ff350b2fd600823ee8491df7df693ae4b7c5
- https://git.kernel.org/stable/c/f4ee84f27625ce1fdf41e8483fa0561a1b837d10

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Page: https://cve.now/CVE-2023-54314
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