{"id":"CVE-2026-62250","published":"2026-10-30T21:17:13.230","lastModified":"2026-10-30T23:17:12.220","description":"LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat->size` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat->byte`, the overflow guard fails because `end` equals `dat->size`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg->object` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-400","CWE-835"],"vendors":[],"products":[],"references":[{"url":"https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/issues/1131","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp","tags":[]}],"exploitRefs":[{"url":"https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/issues/1131","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413","tags":[]},{"url":"https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp","tags":[]}],"hasPoc":true,"ai":null}