CVE-2026-61723

A flaw was found in FluidSynth. The native DLS parser, when processing ptbl chunks, does not properly validate the size calculation, leading to an integer overflow. A remote attacker could craft a malicious DLS file that, when processed, causes the application to attempt to allocate an excessive...

CVE-2026-61722

A flaw was found in FluidSynth, a software synthesizer. This vulnerability, an integer overflow, exists in the native DLS Downloadable Sounds parser when it validates articulation chunks. A remote attacker could exploit this by providing a specially crafted DLS file, which causes the parser to...

CVE-2026-61720

A flaw was found in FluidSynth, a software synthesizer. A remote attacker could exploit an unsigned integer underflow vulnerability in the SoundFont 2 SF2 parser by providing a specially crafted SF2 file. This file, containing a zero-sized DMOD chunk, causes the parser to attempt an excessive...

CVE-2026-61721

A flaw was found in FluidSynth, a software synthesizer. The native DLS Downloadable Sounds loader, responsible for processing sound samples, does not properly validate certain values within crafted DLS files. This oversight allows an attacker to define sample loop points that extend beyond the...

CVE-2026-61714

A flaw was found in FluidSynth, a software synthesizer. When the synth.midi-channels configuration is set above 16, the MIDI player can write beyond the allocated memory for tracking active channels. This heap buffer overflow can lead to out-of-bounds memory access, potentially compromising the...

CVE-2026-61721

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loopstart and wsmp.looplength values to samples without calling fluidsamplevalidate or fluidsamplesanitizeloop. A crafted DLS file can place...

CVE-2026-61722

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates articulation chunks using the unsigned expression cbsize + connblocks 12 without first ensuring that the multiplication and addition fit in 32 bits. A crafted DLS...

CVE-2026-61720

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SFMODSIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the...

CVE-2026-61723

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates ptbl chunks with the unsigned expression cues 4 + cbsize without checking whether the multiplication and addition fit in 32 bits. A crafted DLS file can supply a...

CVE-2026-58264

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 1.1.2 until 2.5.6, the FluidSynth command handler accepts a pitchbendrange command whose channel argument is not bounds checked before the supplied value is written through the selected synth channel. An out-of-ran...

CVE-2026-61714

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.2.4 until 2.5.6, configuring synth.midi-channels above 16 allows the MIDI player to index fluidplayert::channelisplaying outside its fixed-size heap allocation while tracking active channels. The resulting...

CVE-2026-61720 FluidSynth: SF2 DMOD Chunk Unsigned Underflow

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SFMODSIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the...

CVE-2026-61720 FluidSynth: SF2 DMOD Chunk Unsigned Underflow

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SFMODSIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the...

CVE-2026-61720

FluidSynth, a software synthesizer based on the SoundFont 2 specification, is affected by an unsigned integer underflow in its SF2 parser's DMOD chunk handler. When a crafted SF2 file contains a zero-sized DMOD chunk, the expression chunk.size / SF_MOD_SIZE - 1 causes the unsigned subtraction to ...

CVE-2026-61720 FluidSynth: SF2 DMOD Chunk Unsigned Underflow

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SFMODSIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the...

EUVD-2026-83379

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SFMODSIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the...

CVE-2026-61723 FluidSynth: DLS ptbl Chunk Integer Overflow

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates ptbl chunks with the unsigned expression cues 4 + cbsize without checking whether the multiplication and addition fit in 32 bits. A crafted DLS file can supply a...

EUVD-2026-83378

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates ptbl chunks with the unsigned expression cues 4 + cbsize without checking whether the multiplication and addition fit in 32 bits. A crafted DLS file can supply a...

CVE-2026-61723

FluidSynth (a software synthesizer based on the SoundFont 2 specifications) versions 2.5.0 through 2.5.6 are affected by an integer overflow in the native DLS parser's ptbl chunk validation. The expression cues * 4 + cbsize uses 32-bit unsigned arithmetic without bounds checking; with cues = 0x40...

CVE-2026-61723 FluidSynth: DLS ptbl Chunk Integer Overflow

FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS parser validates ptbl chunks with the unsigned expression cues 4 + cbsize without checking whether the multiplication and addition fit in 32 bits. A crafted DLS file can supply a...