Vulnerability · Published Feb 19, 2022 · Assigned by mitre
CVE-2021-46700
Medium 6.5
In plain English
A medium-severity security flaw in the libsixel package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.0%top 38.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In libsixel 1.8.6, sixel_encoder_output_without_macro (called from sixel_encoder_encode_frame in encoder.c) has a double free.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libsixel | no fix listed | DEBIAN-CVE-2021-46700 |
| Debian:13 | libsixel | no fix listed | DEBIAN-CVE-2021-46700 |
| Debian:14 | libsixel | no fix listed | DEBIAN-CVE-2021-46700 |
| Ubuntu:22.04:LTS | libsixel | no fix listed | UBUNTU-CVE-2021-46700 |
| Ubuntu:24.04:LTS | libsixel | no fix listed | UBUNTU-CVE-2021-46700 |
| Ubuntu:25.10 | libsixel | no fix listed | UBUNTU-CVE-2021-46700 |
| Ubuntu:26.04:LTS | libsixel | no fix listed | UBUNTU-CVE-2021-46700 |
| Ubuntu:26.10 | libsixel | no fix listed | UBUNTU-CVE-2021-46700 |
Affected products (as reported)
References
- https://github.com/saitoha/libsixel/issues/158 x_refsource_MISC