# CVE-2026-71614: GPAC integer underflow in dvb_mpe.c

Source: https://junglewise.ai/threats/cve-2026-71614-gpac-integer-underflow-in-dvb-mpe-c  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-09. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-71614 · Severity: high · CVSS 8.4 · Published 2026-09-09

GPAC is an open-source multimedia framework used to process and playback digital media files, including broadcast video streams. An integer underflow vulnerability in its DVB-MPE component allows a malicious media file to trigger a memory allocation failure, crashing the application and causing a denial of service. The vulnerability affects versions prior to the patched commit and can be triggered by opening a specially crafted video file.

Technologies: [Gpac](https://junglewise.ai/threats/technologies/gpac). Vendors: [Gpac](https://junglewise.ai/threats/vendors/gpac).

## Quick answers

**Is CVE-2026-71614 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-71614 being exploited in the wild.

**How severe is CVE-2026-71614?** High severity, with a CVSS score of 8.4, published 9 September 2026.

**Which products and versions are affected?** Gpac prior to 0e4093392e1f847c90d20e031e893cd942fef938 (c2dee3aff638cd96f9617ac5b17dc2868cd90ef3 and earlier).

**Is there a fix for CVE-2026-71614?** A patch was published on 2026-09-09: Fix merged in commit 0e4093392e1f847c90d20e031e893cd942fef938 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-71614 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-71614?** Check whether you run Gpac at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an integer underflow in dvb_mpe.c affecting the descriptorTime_slice_fec_identifier() and gf_m2ts_ipdatagram_reader() functions. When parsing crafted DVB INT table descriptors or UDP datagram sections, an 8-bit or 32-bit size value is subtracted without validation, causing wrap-around when the value is smaller than the subtraction amount (e.g., 1 - 3 wraps to 0xFFFFFFFFFFFFFFFE). This causes gf_malloc() to be called with an impossibly large allocation size, which fails and crashes the process. The attack is triggered by crafting a malicious Transport Stream (TS) file with a time_slice_fec descriptor (tag 0x77) of length 1 byte. No authentication or user interaction beyond opening the file is required; the vulnerability is not believed to be exploitable for code execution, only denial of service. A fix is available in commit 0e4093392e1f847c90d20e031e893cd942fef938, which adds bounds checks before the subtraction operations.

## Affected products

- GPAC GPAC prior to 0e4093392e1f847c90d20e031e893cd942fef938 (c2dee3aff638cd96f9617ac5b17dc2868cd90ef3 and earlier)

## Timeline

- 2026-06-11: disclosed: Vulnerability reported via GitHub issue #3614
- 2026-09-09: patched: Fix merged in commit 0e4093392e1f847c90d20e031e893cd942fef938
- 2026-09-09: advisory: CVE-2026-71614 published

## References

- [https://github.com/gpac/gpac/commit/0e4093392e1f847c90d20e031e893cd942fef938](https://github.com/gpac/gpac/commit/0e4093392e1f847c90d20e031e893cd942fef938)
- [https://github.com/gpac/gpac/issues/3614](https://github.com/gpac/gpac/issues/3614)

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