CVE-2026-44638
- Source
- https://cve.org/CVERecord?id=CVE-2026-44638
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44638.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-44638
- Aliases
-
- GHSA-wpx3-h5g8-qr3w
- Downstream
- Published
- 2026-05-14T19:59:29Z
- Modified
- 2026-10-21T02:50:20Z
- Severity
-
- 2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- libsixel: NULL pointer dereference
- Details
-
libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a wrong NULL check after an allocation call in sixel_decode_raw and sixel_decode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter (always non-NULL) instead of the value the malloc returned. On allocation failure, the function continues and writes through a NULL pointer, crashing the process. This is a denial of service against any caller of these public APIs that hits a low-memory condition. This vulnerability is fixed in 1.8.7-r2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-476", "CWE-690" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44638.json" }- References
Affected packages
Git / github.com/saitoha/libsixel
Affected ranges
- Type
- GIT
- Repo
- https://github.com/saitoha/libsixel
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "1.0.0" }, { "fixed": "1.8.7-r2" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "cpe": "cpe:2.3:a:saitoha:libsixel:*:*:*:*:*:*:*:*", "range": [ { "introduced": "1.0.0" }, { "fixed": "1.8.7-r2" } ], "source": "CPE_RANGE" } ] }
Affected versions
Other
nightly-latest
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.2
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.4.0
v1.4.1
v1.4.10
v1.4.11
v1.4.12
v1.4.13
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4.8
v1.4.9
v1.5.0
v1.5.1
v1.5.2
v1.6.1
v1.7.1
v1.7.2
v1.7.3
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7
v1.8.7-r1