Description
gbsplay through 0.0.103 contains a heap out-of-bounds read vulnerability in vgm_open() in gbs.c that walks the VGM command stream without bounds checks. Attackers can supply a crafted VGM file with wait opcodes and no 0x66 terminator to read past the heap buffer and crash the player.
References7
- github.com/mmitch/gbsplay
- github.com/mmitch/gbsplay/blob/0.0.103/gbs.c#L996-L1010
- github.com/mmitch/gbsplay/commit/91b1f6df0abd3914f91caa528ec321…
- github.com/mmitch/gbsplay/issues/201
- hackmd.io/@haindpwn/gbsplay-rom-bank-index-oob-read
- www.vulncheck.com/advisories/gbsplay-through-0.0.103-heap-out-o…
- hackmd.io/@haindpwn/gbsplay-rom-bank-index-oob-read
Metrics
- CVSS 3.1
-
3.3
LOW
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - CVSS 4.0
-
4.8
MEDIUM
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 3 · as of 8 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.