Buffer overflow in Saitoha Libsixel
CVE-2025-9300
A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (17.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Saitoha Libsixel — versions 1.10.0, 1.10.1, 1.10.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-320905 | saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-320905 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #632366 | LibSixel img2sixel LibSixel version 1.10.3 (commit 6dd664c) compiled on Aug 2 2025 and the newest master version. Heap Buffer Overflow (Exploit, Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Issue Tracking)
- cna@vuldb.com (issue-tracking, Exploit, Issue Tracking)
- cna@vuldb.com (Exploit, exploit)
- cna@vuldb.com (Patch, patch)
Frequently asked questions
- What is CVE-2025-9300?
- CVE-2025-9300 is a medium-severity vulnerability in Saitoha Libsixel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-08-21.
- How severe is CVE-2025-9300?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-9300 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.