Null Pointer Dereference in libuvc UVC Descriptor Handler
CVE-2026-1991

4.8MEDIUM

Key Information:

Vendor

libuvc

Status
Libuvc
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1991?

A vulnerability has been identified in libuvc up to version 0.0.7 that affects the function uvc_scan_streaming within the UVC Descriptor Handler located in the file src/device.c. This flaw leads to a null pointer dereference, which can potentially allow an attacker local access to disrupt operations. The exploit has been made public, and despite the project's early notification about this issue through an issue report, there has been no response to date.

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Affected Version(s)

libuvc 0.0.1

libuvc 0.0.2

libuvc 0.0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1991 - Proof of Concept

References

https://vuldb.com/?id.344509
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344509
signaturepermissions-required
https://vuldb.com/?submit.743388
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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