CVE-2026-111138
CVE-2026-111138 · NetSurf libnsbmp through 0.1.7 Out-of-Bounds Read in RLE8 and RLE4 Decoders
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.8 · Medium · EPSS 0.1%
- Published
- Updated
Stack: system
Affected products and versions
Original sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-111138