PT-2025-34215 · Libsixel+3 · Libsixel+3

Xdcao · Published 2025-08-12 · Updated 2025-11-21 · CVE-2025-9300

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: libsixel versions up to 1.10.3

Description: A vulnerability exists in saitoha libsixel up to version 1.10.3. This issue affects the sixel debug print palette function within the img2sixel component, located in the src/encoder.c file. Manipulation of this function can lead to a stack-based buffer overflow. The attack requires local access. The exploit for this issue has been publicly released.

Recommendations: libsixel versions prior to 1.10.3: Apply patch 316c086e79d66b62c0c4bc66229ee894e4fdb7d1 to resolve this issue.

Exploit

Fix

RCE

Memory Corruption

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-787

CWE-121

CWE-119

Related Identifiers

ALT-PU-2025-14818

BDU:2025-14974

CVE-2025-9300

OPENSUSE-SU-2025:15526-1

Affected Products

Alt Linux

Debian

Img2Sixel

Libsixel

References · 28

• 🔥 https://github.com/saitoha/libsixel/commit/316c086e79d66b62c0c4bc66229ee894e4fdb7d1 · Exploit
• 🔥 https://github.com/saitoha/libsixel/issues/200#issuecomment-3178785635 · Exploit
• 🔥 https://github.com/saitoha/libsixel/issues/200 · Exploit
• 🔥 https://drive.google.com/file/d/1IIvvRFgUQZcySqeoqXXhsxd0HZCjClJ7/view?usp=sharing · Exploit
• 🔥 https://vuldb.com/?submit.632366 · Exploit
• https://security-tracker.debian.org/tracker/CVE-2025-9300 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-9300 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-9300 · Security Note
• https://ubuntu.com/security/CVE-2025-9300 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-9300 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-9300 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-1113SE18 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15526-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-14974 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-9300 · Vendor Advisory