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CVE-2026-5657— Double Free in Wireshark

Quick assessment

Affected
Wireshark Foundation Wireshark
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wireshark是导线鲨鱼（Wireshark）团队的一套网络数据包分析软件。该软件的功能是截取网络数据包，并显示出详细的数据以供分析。 Wireshark 4.6.0至4.6.4版本和4.4.0至4.4.14版本存在资源管理错误漏洞，该漏洞源于iLBC编解码器崩溃，可能导致拒绝服务。

CVSS 5.5 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Wireshark Foundation Wireshark 4.6.0< 4.6.5 affected
4.4.0< 4.4.15 affected
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I. Basic Information for CVE-2026-5657

Vulnerability Information
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Vulnerability Title
Double Free in Wireshark
Source: CVE Program / CVE List V5
Vulnerability Description
iLBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
Wireshark 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wireshark是导线鲨鱼（Wireshark）团队的一套网络数据包分析软件。该软件的功能是截取网络数据包，并显示出详细的数据以供分析。 Wireshark 4.6.0至4.6.4版本和4.4.0至4.4.14版本存在资源管理错误漏洞，该漏洞源于iLBC编解码器崩溃，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wireshark Foundation Wireshark 4.6.0 ~ 4.6.5 -

II. Public POCs for CVE-2026-5657

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III. Intelligence Information for CVE-2026-5657

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Patches & Fixes for CVE-2026-5657 (1)

Vendor Advisories for CVE-2026-5657 (1)

Same Patch Batch · Wireshark Foundation · 2026-04-30 · 42 CVEs total

CVE-2026-5402 8.8 HIGH Heap-based Buffer Overflow in Wireshark
CVE-2026-5403 7.8 HIGH Heap-based Buffer Overflow in Wireshark
CVE-2026-5405 7.8 HIGH Heap-based Buffer Overflow in Wireshark
CVE-2026-5656 7.0 HIGH Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Wireshar
CVE-2026-6527 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-7375 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
CVE-2026-6519 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
CVE-2026-6528 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
CVE-2026-6523 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
CVE-2026-6533 5.5 MEDIUM Improperly Controlled Sequential Memory Allocation in Wireshark
CVE-2026-6535 5.5 MEDIUM Improperly Controlled Sequential Memory Allocation in Wireshark
CVE-2026-5408 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-5409 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-5653 5.5 MEDIUM Heap-based Buffer Overflow in Wireshark
CVE-2026-5655 5.5 MEDIUM Use After Free in Wireshark
CVE-2026-5406 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-5401 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-5299 5.5 MEDIUM Uncontrolled Recursion in Wireshark
CVE-2026-5654 5.5 MEDIUM Stack-based Buffer Overflow in Wireshark
CVE-2026-5407 5.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark

Showing top 20 of 42 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Wireshark
Same vendor: Wireshark Foundation
Same weakness: CWE-415

V. Comments for CVE-2026-5657

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