CVE-2026-44638: saitoha libsixel, грешка в паметта

Описание

Оригинално описание

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.

Засегнати продукти

• saitoha libsixel: >= 1.0.0, < 1.8.7-r2

Вид слабост

• CWE-476 Разименуване на NULL указател
• CWE-690 Unchecked Return Value to NULL Pointer Dereference

История

Други уязвимости в saitoha libsixel

• 6.3CVE-2026-110601
• 7.1CVE-2026-44637
• 7.4CVE-2026-44636
• 7.8CVE-2026-33023
• 7.3CVE-2026-33021

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-44638
• https://nvd.nist.gov/vuln/detail/CVE-2026-44638
• https://github.com/saitoha/libsixel/security/advisories/GHSA-wpx3-h5g8-qr3w