CVEs (48)
CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS |
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2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Sep 14, 2021 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 An issue in the dither.c component of libsixel prior to v1.8.4 allows attackers to cause a denial of service (DOS) via a crafted PNG file. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Aug 10, 2021 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Apr 14, 2021 N/A· v4 7.5 HIGH· v3 5.0 MEDIUM· v2 Buffer Overflow in the "sixel_encoder_encode_bytes" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS). |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Nov 20, 2020 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 Unverified indexs into the array lead to out of bound access in the gif_out_code function in fromgif.c in libsixel 1.8.6. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Apr 12, 2020 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized pointer leading to an invalid call to free, which can cause a denial of service. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Jan 2, 2020 N/A· v4 8.8 HIGH· v3 6.8 MEDIUM· v2 libsixel 1.8.4 has an integer overflow in sixel_frame_resize in frame.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 30, 2019 N/A· v4 8.8 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_out_code at fromgif.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 30, 2019 N/A· v4 8.8 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in libsixel 1.8.4. There is a heap-based buffer overflow in the function gif_init_frame at fromgif.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 27, 2019 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 27, 2019 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 27, 2019 N/A· v4 6.5 MEDIUM· v3 4.3 MEDIUM· v2 An invalid memory address dereference was discovered in load_pnm in frompnm.c in libsixel before 1.8.3. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 13, 2019 N/A· v4 8.8 HIGH· v3 6.8 MEDIUM· v2 An issue was discovered in libsixel 1.8.2. There is a heap-based buffer over-read in the function load_sixel at loader.c. |
3Libsixel Project NothingsSaitoha3Libsixel LibsixelStb Image.hApr 24, 2026 Dec 13, 2019 N/A· v4 8.8 HIGH· v3 6.8 MEDIUM· v2 stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has a heap-based buffer over-read in stbi__load_main. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 8, 2019 N/A· v4 9.8 CRITICAL· v3 7.5 HIGH· v2 An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function load_pnm at frompnm.c, due to an integer overflow. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 8, 2019 N/A· v4 9.8 CRITICAL· v3 7.5 HIGH· v2 An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_decode_raw_impl at fromsixel.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 8, 2019 N/A· v4 9.8 CRITICAL· v3 7.5 HIGH· v2 An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_encode_body at tosixel.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Dec 8, 2019 N/A· v4 9.8 CRITICAL· v3 7.5 HIGH· v2 An issue was discovered in libsixel 1.8.2. There is a heap-based buffer overflow in the function sixel_decode_raw_impl at fromsixel.c. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Apr 8, 2019 N/A· v4 5.5 MEDIUM· v3 4.3 MEDIUM· v2 The load_pnm function in frompnm.c in libsixel.a in libsixel 1.8.2 has infinite recursion. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Jan 2, 2019 N/A· v4 7.8 HIGH· v3 6.8 MEDIUM· v2 In libsixel v1.8.2, there is a heap-based buffer over-read in the function load_jpeg() in the file loader.c, as demonstrated by img2sixel. |
2Libsixel Project Saitoha2Libsixel LibsixelApr 24, 2026 Jan 2, 2019 N/A· v4 5.5 MEDIUM· v3 4.3 MEDIUM· v2 In libsixel v1.8.2, there is an infinite loop in the function sixel_decode_raw_impl() in the file fromsixel.c, as demonstrated by sixel2png. |