CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

DEBIAN-CVE-2026-44636

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, signed integer overflow in sixelencodehighcolor's allocation size calculation can lead to a heap buffer overflow. The public sixelencode entry point validates only that width and height are greater th...

DEBIAN-CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

UBUNTU-CVE-2026-44638

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 sixeldecoderaw and sixeldecode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter alway...

UBUNTU-CVE-2026-44636

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, signed integer overflow in sixelencodehighcolor's allocation size calculation can lead to a heap buffer overflow. The public sixelencode entry point validates only that width and height are greater th...

CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

UBUNTU-CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44637

CVE-2026-44637 affects libsixel (SIXEL encoder/decoder). A signed integer overflow in the parser’s image-buffer doubling loop (sixel_decode_raw_impl) occurs as context->pos_x is incremented by repeat_count with no upper bound check. When pos_x nears INT_MAX, pos_x + repeat_count overflows sign...

CVE-2026-44637 libsixel: integer overflow in parser

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44637 libsixel: integer overflow in parser

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44637 libsixel: integer overflow in parser

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

EUVD-2026-30412

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44637

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixeldecoderawimpl. context-posx grows by repeatcount on every sixel character wit...

CVE-2026-44638

CVE-2026-44638 affects the libsixel SIXEL encoder/decoder. A wrong NULL check after allocation in sixel_decode_raw and sixel_decode causes a NULL pointer dereference when allocation fails, enabling a denial-of-service for callers under low-memory conditions. The issue stems from testing the addre...

CVE-2026-44638 libsixel: NULL pointer dereference

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 sixeldecoderaw and sixeldecode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter alway...

CVE-2026-44638

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 sixeldecoderaw and sixeldecode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter alway...

PT-2026-41033

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a signed integer overflow in the SIXEL parser's image-buffer doubling loop can lead to an out-of-bounds heap write in sixel decode raw impl. context-pos x grows by repeat count on every sixel characte...

libsixel 输入验证错误漏洞

Libsixel is a software package developed by Hayaki Saito, which provides encoding/decoding implementations for DEC SIXEL graphics and other conversion programs. Versions of Libsixel 1.8.7-r1 and earlier contained a vulnerability related to input validation errors. This vulnerability stemmed from ...

PT-2026-41034

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...