{"id":"CVE-2026-111138","state":"PUBLISHED","title":"NetSurf libnsbmp through 0.1.7 Out-of-Bounds Read in RLE8 and RLE4 Decoders","description":"NetSurf libnsbmp through 0.1.7 contains an out-of-bounds read vulnerability in bmp_decode_rle8() and bmp_decode_rle4() because absolute-run bound checks omit the word-alignment pad byte. Attackers can supply a crafted RLE8 or RLE4 BMP ending on an odd-length absolute run to cause a one-byte heap over-read, crashing applications decoding untrusted images.","publishedAt":"2026-10-15T18:57:31.267Z","updatedAt":"2026-10-15T19:44:28.460Z","severity":{"score":6.8,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["NetSurf libnsbmp"],"affected":[{"vendor":"NetSurf","product":"libnsbmp","packageURL":"pkg:github/netsurf-browser/libnsbmp","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.1.7","versionType":"custom"}],"collectionURL":"https://github.com/netsurf-browser/libnsbmp","repo":"https://github.com/netsurf-browser/libnsbmp"}],"references":["https://hackmd.io/@haind-pwn/libnsbmp-rle-absolute-pad-and-ico-mask-oob-read","https://github.com/netsurf-browser/libnsbmp/blob/ea063c9f46acb43e90208da14073332b505ef7e7/src/libnsbmp.c#L942-L982","https://github.com/netsurf-browser/libnsbmp/blob/ea063c9f46acb43e90208da14073332b505ef7e7/src/libnsbmp.c#L1096-L1147","https://download.netsurf-browser.org/libs/releases/libnsbmp-0.1.7-src.tar.gz","https://github.com/netsurf-browser/libnsbmp","https://www.vulncheck.com/advisories/netsurf-libnsbmp-through-0.1.7-out-of-bounds-read-in-rle8-and-rle4-decoders"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111138.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111138","state":"PUBLISHED","datePublished":"2026-10-15T18:57:31.267Z","dateUpdated":"2026-10-15T19:44:28.460Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-15T17:03:55.771Z"},"containers":{"cna":{"title":"NetSurf libnsbmp through 0.1.7 Out-of-Bounds Read in RLE8 and RLE4 Decoders","descriptions":[{"lang":"en","value":"NetSurf libnsbmp through 0.1.7 contains an out-of-bounds read vulnerability in bmp_decode_rle8() and bmp_decode_rle4() because absolute-run bound checks omit the word-alignment pad byte. 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