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Search Results (365286 CVEs found)

CVE Vendors Products Updated CVSS v3.1
CVE-2026-34610 2 Leancrypto, Smuellerdd 2 Leancrypto, Leancrypto 2026-04-24 5.9 Medium
The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.7.1, lc_x509_extract_name_segment() casts size_t vlen to uint8_t when storing the Common Name (CN) length. An attacker who crafts a certificate with CN = victim's CN + 256 bytes padding gets cn_size = (uint8_t)(256 + N) = N, where N is the victim's CN length. The first N bytes of the attacker's CN are the victim's identity. After parsing, the attacker's certificate has an identical CN to the victim's — enabling identity impersonation in PKCS#7 verification, certificate chain matching, and code signing. This issue has been patched in version 1.7.1.
CVE-2022-29978 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
There is a floating point exception error in sixel_encoder_do_resize, encoder.c:633 in libsixel img2sixel 1.8.6. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted JPEG file.
CVE-2022-29977 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
There is an assertion failure error in stbi__jpeg_huff_decode, stb_image.h:1894 in libsixel img2sixel 1.8.6. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted JPEG file.
CVE-2022-27046 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
libsixel 1.8.6 suffers from a Heap Use After Free vulnerability in in libsixel/src/dither.c:388.
CVE-2022-27044 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
libsixel 1.8.6 is affected by Buffer Overflow in libsixel/src/quant.c:876.
CVE-2021-46700 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
In libsixel 1.8.6, sixel_encoder_output_without_macro (called from sixel_encoder_encode_frame in encoder.c) has a double free.
CVE-2020-36120 1 Saitoha 1 Libsixel 2026-04-24 7.5 High
Buffer Overflow in the "sixel_encoder_encode_bytes" function of Libsixel v1.8.6 allows attackers to cause a Denial of Service (DoS).
CVE-2020-21677 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
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.
CVE-2020-21548 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.
CVE-2020-21547 1 Saitoha 1 Libsixel 2026-04-24 8.8 High
Libsixel 1.8.2 contains a heap-based buffer overflow in the dither_func_fs function in tosixel.c.
CVE-2020-21050 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif_process_raster at fromgif.c.
CVE-2018-14072 1 Saitoha 1 Libsixel 2026-04-24 N/A
libsixel 1.8.1 has a memory leak in sixel_decoder_decode in decoder.c, image_buffer_resize in fromsixel.c, and sixel_decode_raw in fromsixel.c.
CVE-2018-19761 1 Saitoha 1 Libsixel 2026-04-24 N/A
There is an illegal address access at fromsixel.c (function: sixel_decode_raw_impl) in libsixel 1.8.2 that will cause a denial of service.
CVE-2019-11024 1 Saitoha 1 Libsixel 2026-04-24 N/A
The load_pnm function in frompnm.c in libsixel.a in libsixel 1.8.2 has infinite recursion.
CVE-2019-19635 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
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.
CVE-2019-19636 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_encode_body at tosixel.c.
CVE-2019-19637 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
An issue was discovered in libsixel 1.8.2. There is an integer overflow in the function sixel_decode_raw_impl at fromsixel.c.
CVE-2019-19638 1 Saitoha 1 Libsixel 2026-04-24 9.8 Critical
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.
CVE-2019-20024 1 Saitoha 1 Libsixel 2026-04-24 6.5 Medium
A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.
CVE-2019-19777 2 Nothings, Saitoha 2 Stb Image.h, Libsixel 2026-04-24 8.8 High
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.