# CVE-2026-95388: Wireshark Sharkd RTP resampler buffer overflow denial of service

Source: https://junglewise.ai/threats/cve-2026-95388-sharkd-utility-crash-in-4-6-0-to-4-6-8-and-4-4-0-to-4-4-18-allows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-95388 · Severity: medium · CVSS 5.5 · Published 2026-09-29

Sharkd is a backend utility in Wireshark that analyzes network traffic through a JSON interface, including the ability to export audio streams from captured RTP packets. A specially crafted RTP capture with conflicting audio sample rates can trigger a buffer overflow in the resampling code, causing Sharkd to crash and terminating the analysis session. An attacker who can supply a malicious capture file to an analyst can use this to deny service.

Technologies: [Wireshark Foundation Wireshark](https://junglewise.ai/threats/technologies/wireshark-foundation-wireshark). Vendors: [Wireshark Foundation](https://junglewise.ai/threats/vendors/wireshark-foundation).

## Quick answers

**Is CVE-2026-95388 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-95388 being exploited in the wild.

**How severe is CVE-2026-95388?** Medium severity, with a CVSS score of 5.5, published 29 September 2026.

**Which products and versions are affected?** Wireshark Foundation Sharkd 4.4.0 to 4.4.18, 4.6.0 to 4.6.8; Wireshark Foundation Wireshark 4.4.0 to 4.4.18, 4.6.0 to 4.6.8.

**Is there a fix for CVE-2026-95388?** A patch was published on 2026-09-23: Fixed versions 4.4.19, 4.6.9 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-95388 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-95388?** Check whether you run Wireshark Foundation Sharkd or Wireshark Foundation Wireshark 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 wrap in 32-bit arithmetic within the RTP resampler output-size calculation in sharkd_session.c. When processing RTP packets with two widely different L16 clock rates (e.g., 8,388,609 Hz and 1 Hz), the multiplication of audio_out_rate_ by payload length overflows, causing the subsequent buffer-size check to pass despite insufficient space, and the resampler writes far beyond the 4 KiB destination buffer. The attack requires only that the crafted capture be readable by Sharkd and that a normal RTP download operation be performed; it does not require authentication or Sharkd request forgery.

## Affected products

- Wireshark Foundation Wireshark 4.4.0 to 4.4.18, 4.6.0 to 4.6.8
- Wireshark Foundation Sharkd 4.4.0 to 4.4.18, 4.6.0 to 4.6.8

## Timeline

- 2026-09-23: disclosed
- 2026-09-29: advisory
- 2026-09-23: patched: Fixed versions 4.4.19, 4.6.9

## References

- [https://gitlab.com/wireshark/wireshark/-/work_items/21545](https://gitlab.com/wireshark/wireshark/-/work_items/21545)
- [https://www.wireshark.org/security/wnpa-sec-2026-101.html](https://www.wireshark.org/security/wnpa-sec-2026-101.html)

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