A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
Priority LOW 31CWE-401Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.
Summary
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
Why it matters now
EPSS 0.00994 62nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-20023
- 2026-10-03 Alias added: GHSA-273r-q5cp-p9c2
References
More saitoha Libsixel vulnerabilities
- TI-2026-32536 libsixel: integer overflow in encoder CVSS 3.1HIGH 7.8
- TI-2026-25469 libsixel: Use-after-free in load_with_gdkpixbuf() CVSS 3.1HIGH 7.8
- TI-2026-32537 libsixel: integer overflow in parser CVSS 3.1HIGH 7.1
- TI-2026-25466 libsixel: Integer Overflow in write_png_to_file() leads to Heap-based Buffer Overflow CVSS 3.1HIGH 7.1
- TI-2026-25464 libsixel: Use-After-Free in load_gif() CVSS 3.1HIGH 7.0
- TI-2026-25467 libsixel: Use-after-free in sixel_encoder_encode_bytes() CVSS 3.1HIGH 7.3
Sources
- CVE-2019-20023 · CVE Program
- CVE-2019-20023 · NVD
- FIRST EPSS
- GHSA-273r-q5cp-p9c2 · GitHub Advisory Database · CC BY 4.0
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