CVE-2023-53220

media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()

State: Published
Severity: 5.5 Medium
Published: Sep 15, 2025
Updated: May 11, 2026
Reserved: Sep 15, 2025

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()")

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before c6763fefa267f6e62595a6ac1f57815d99fc90b7Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before adcb73f8ce9aec48b1f85223f401c1574015d8d2Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 991c77fe18c6f374bbf83376f8c42550aa565662Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before a9def3e9718a4dc756f48db147d42ec41a966240Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 5b1ea100ad3695025969dc4693f307877fb688d6Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 6ab7ea4e17d6a605d05308adf8f3408924770cbaAffected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before a1110f19d4940e4185251d072cbb0ff51486a1e7Affected caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 1047f9343011f2cedc73c64829686206a7e9fc3fAffected
LinuxLinux	3.4Affected before 3.4Not affected 4.14.326 through 4.14.Not affected 4.19.295 through 4.19.Not affected 5.4.257 through 5.4.Not affected 5.10.197 through 5.10.Not affected 5.15.133 through 5.15.Not affected 6.1.55 through 6.1.Not affected 6.5.5 through 6.5.*Not affected 6.6 and laterNot affected

Product

Versions

LinuxLinux

caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before c6763fefa267f6e62595a6ac1f57815d99fc90b7Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before adcb73f8ce9aec48b1f85223f401c1574015d8d2Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 991c77fe18c6f374bbf83376f8c42550aa565662Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before a9def3e9718a4dc756f48db147d42ec41a966240Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 5b1ea100ad3695025969dc4693f307877fb688d6Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 6ab7ea4e17d6a605d05308adf8f3408924770cbaAffected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before a1110f19d4940e4185251d072cbb0ff51486a1e7Affected
caa1a700ed2a06a831e6a7db5d9f213fc63caee3 to before 1047f9343011f2cedc73c64829686206a7e9fc3fAffected

LinuxLinux

3.4Affected
before 3.4Not affected
4.14.326 through 4.14.*Not affected
4.19.295 through 4.19.*Not affected
5.4.257 through 5.4.*Not affected
5.10.197 through 5.10.*Not affected
5.15.133 through 5.15.*Not affected
6.1.55 through 6.1.*Not affected
6.5.5 through 6.5.*Not affected
6.6 and laterNot affected

References

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