Null Pointer Dereference in 9fans Plan9port Library
CVE-2025-7209

4.8MEDIUM

Key Information:

Vendor

9fans

Status
Plan9port
Vendor
CVE Published:
9 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7209?

A vulnerability has been identified in the value_decode function within the src/libsec/port/x509.c library of 9fans Plan9port, affecting versions up to commit 9da5b44. This issue can lead to a null pointer dereference, requiring local access to exploit. The vulnerability was publicly disclosed and has been patched. Users are advised to apply the necessary updates to safeguard their systems.

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Deploy the Patch

Affected Version(s)

plan9port 9da5b44

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-2025-7209 - Proof of Concept

References

https://vuldb.com/?id.315157
vdb-entrytechnical-description
https://vuldb.com/?ctiid.315157
signaturepermissions-required
https://vuldb.com/?submit.607685
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

JJLeo (VulDB User)
JSON
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