Stack-based Buffer Overflow in saitoha Libsixel Product
CVE-2025-9300

4.8MEDIUM

Key Information:

Vendor

Saitoha

Status
Libsixel
Vendor
CVE Published:
21 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9300?

A stack-based buffer overflow vulnerability exists in the function 'sixel_debug_print_palette' within the img2sixel component of saitoha's Libsixel library, affecting versions up to 1.10.3. This issue can be exploited by attackers in a local context, potentially allowing for unauthorized access or manipulation of system memory. It is crucial to apply the provided patch (commit ID: 316c086e79d66b62c0c4bc66229ee894e4fdb7d1) to mitigate this vulnerability and safeguard against potential exploitation.

Affected Version(s)

libsixel 1.10.0

libsixel 1.10.1

libsixel 1.10.2

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-2025-9300 - Proof of Concept

References

https://vuldb.com/?id.320905
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320905
signaturepermissions-required
https://vuldb.com/?submit.632366
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
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

xdcao (VulDB User)
.