{"id":"CVE-2026-111139","published":"2026-10-15T19:17:27.983","lastModified":"2026-10-16T18:25:45.343","description":"NetSurf libnsbmp through 0.1.7 contains an out-of-bounds read vulnerability in bmp_decode_mask() that allows attackers to read one byte past the image buffer by supplying crafted ICO files. Attackers can provide an ICO whose inner bitmap width is not a multiple of 8, causing a heap over-read that can crash applications calling bmp_decode().","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-125"],"vendors":[],"products":[],"references":[{"url":"https://download.netsurf-browser.org/libs/releases/libnsbmp-0.1.7-src.tar.gz","tags":[]},{"url":"https://github.com/netsurf-browser/libnsbmp","tags":[]},{"url":"https://github.com/netsurf-browser/libnsbmp/blob/ea063c9f46acb43e90208da14073332b505ef7e7/src/libnsbmp.c#L835-L873","tags":[]},{"url":"https://hackmd.io/@haind-pwn/libnsbmp-rle-absolute-pad-and-ico-mask-oob-read","tags":[]},{"url":"https://www.vulncheck.com/advisories/netsurf-libnsbmp-through-0.1.7-out-of-bounds-read-via-bmp-decode-mask","tags":[]}],"exploitRefs":[{"url":"https://github.com/netsurf-browser/libnsbmp","tags":[]},{"url":"https://github.com/netsurf-browser/libnsbmp/blob/ea063c9f46acb43e90208da14073332b505ef7e7/src/libnsbmp.c#L835-L873","tags":[]}],"hasPoc":true,"ai":null}