CVE-2026-5402
published 2026-04-30CVE-2026-5402: TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.39%
31.4th percentile
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| gitlab | wireshark | — | — |
| wireshark | wireshark | 4.6.0 – 4.6.4 | — |
| wireshark_foundation | wireshark | >= 4.6.0 < 4.6.5 | 4.6.5 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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Red Hat
wireshark: Heap-based Buffer Overflow in Wireshark
vendor_redhat·2026-04-30·CVSS 8.8
CVE-2026-5402 [HIGH] CWE-122 wireshark: Heap-based Buffer Overflow in Wireshark
wireshark: Heap-based Buffer Overflow in Wireshark
A flaw was found in the TLS protocol dissector in Wireshark. This issue occurs when malformed packets are decoded from a pcap file or the network, causing a heap-based buffer overflow, resulting in a denial of service or potentially in code execution.
Statement: This issue will cause a crash in Wireshark and potentially result in code execution. This flaw can only be exploited when a malformed pcap file is processed. Due to these reasons, this vulnerability has been rated with an important severity.
Mitigation: If the TLS protocol dissector is not being used, it can be disabled via the "Enabled Protocols" dialog box in the Wireshark GUI application. This will also disable the protocol dissector when using "tshark", the command line tool
GitLab
Heap-based Buffer Overflow in Wireshark
vendor_gitlab·2026-04-30·CVSS 8.8
CVE-2026-5402 [HIGH] CWE-122 Heap-based Buffer Overflow in Wireshark
Heap-based Buffer Overflow in Wireshark
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
Affected products: Wireshark
Affected versions: >=4.6.0, <4.6.5 (affected)
Solution: Upgrade to version 4.6.5 or above
Credit: Duc Anh Nguyen
GHSA
GHSA-f6fp-9f7c-rfwv: TLS protocol dissector heap overflow in Wireshark 4
ghsa_unreviewed·2026-04-30
CVE-2026-5402 [HIGH] CWE-122 GHSA-f6fp-9f7c-rfwv: TLS protocol dissector heap overflow in Wireshark 4
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark [fedora-all]
bugzilla·2026-05-04·CVSS 8.8
CVE-2026-5402 [HIGH] CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark [fedora-all]
CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark
bugzilla·2026-04-30·CVSS 8.8
CVE-2026-5402 [HIGH] CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark
CVE-2026-5402 wireshark: Heap-based Buffer Overflow in Wireshark
TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
Hackernews
⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
blogs_hackernews·2026-05-04·CVSS 9.3
CVE-2026-41940 [CRITICAL] ⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
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## ⚡ Weekly Recap: AI-Powered Phishing, Android Spying Tool, Linux Exploit, GitHub RCE & More
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2026-04-30
Published