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A connected peer can encode a button index beyond the advertised input size. The decoder used it to write past GameInput::bits and into adjacent session state. Validate packet length, compressed bit framing, input size, and every button index before dispatching the message.
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…ast's open pull requests, release candidates in the updater, no Screenshot control - Netplay: the checksum of a save state or of a CDI, GDI or CUE image is the file's, not its pointer's (flyinghead#2513). - sh4: the FPSCR cause field is cleared when the guest writes FPSCR (flyinghead#2531). - CHD: the track metadata's text fields are held to their buffers (flyinghead#2384). - Input: absolute mouse motion rebased after relative input (flyinghead#2528); axis detection for triggers that report as buttons (flyinghead#2213). - Checks of an ISO9660 directory record, RZIP chunk sizes, DNS answers, GGPO input packets and card events, and a Naomi LST's ranges (flyinghead#2414, flyinghead#2415, flyinghead#2416, flyinghead#2519, flyinghead#2520, flyinghead#2521). - The updater ranks v1.1.0-rc1 under v1.1.0, and a release's build is not offered candidates. - The quick menu's Screenshot row and control are gone: the console's Create button takes screenshots. - Built with PS5_Vulkan 5b5e4fc, the payload SDK fork at b5efad5 and libsmb2 7e4ff97. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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A connected GGPO peer can send a compressed input record whose button number is outside the advertised input size.
UdpProtocol::OnInputcurrently passes that number directly to:GameInput::setindexesbits[button / 8]. A button value of 255 therefore accessesbits[31], beyond the 18-byte array, and corrupts adjacent GGPO session state. This can crash or destabilize online play.Validate the complete Input packet before dispatch. The new validation checks the received byte length, compressed bit framing, input size, and every decoded button index. Validation occurs before the decoder mutates its receive state.