{"id":"CVE-2026-54610","published":"2026-10-30T21:16:57.520","lastModified":"2026-10-30T21:16:57.520","description":"LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14.","cvssScore":3.3,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwes":["CWE-471","CWE-703"],"vendors":[],"products":[],"references":[{"url":"https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/releases/tag/0.14","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq","tags":[]},{"url":"https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz","tags":[]}],"exploitRefs":[{"url":"https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/releases/tag/0.14","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq","tags":[]},{"url":"https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz","tags":[]}],"hasPoc":true,"ai":null}