CVE-2023-53220
media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()
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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()")
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/1047f9343011f2cedc73c64829686206a7e9fc3f
- https://git.kernel.org/stable/c/5b1ea100ad3695025969dc4693f307877fb688d6
- https://git.kernel.org/stable/c/6ab7ea4e17d6a605d05308adf8f3408924770cba
- https://git.kernel.org/stable/c/991c77fe18c6f374bbf83376f8c42550aa565662
- https://git.kernel.org/stable/c/a1110f19d4940e4185251d072cbb0ff51486a1e7
References (8)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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