CVE-2026-5657Public exploit

Application crash via caller-owned codec context double-free

Published Apr 30, 2026 · Updated Apr 30, 2026

Double free in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to crash the application via iLBC RTP data. codec_iLBC_release() frees the caller-owned codec context, and the caller later frees the same pointer again when releasing the decoder. The demonstrated path requires opening a malformed capture, playing its iLBC RTP stream, and closing Wireshark, which terminates the process without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in Wireshark 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4 allows attackers to crash the application via iLBC RTP data. codec_iLBC_release() frees the caller-owned codec context, and the caller later frees the same pointer again when releasing the decoder. The demonstrated path requires opening a malformed capture, playing its iLBC RTP stream, and closing Wireshark, which terminates the process without reported data disclosure or modification.

The record

CVE
CVE-2026-5657
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-415, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4.0 <4.4.15
  2. Affected versionversion=4.6.0 <4.6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.15; version=4.6.0 <4.6.5

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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