CVE-2026-95393
published 2026-09-29CVE-2026-95393: CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
PriorityP415medium4.7CVSS 3.1
AVLACHPRNUIRSUCNINAH
EPSS
0.12%
1.9th percentile
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| gitlab | wireshark | — | — |
| wireshark | wireshark | — | — |
| wireshark | wireshark | >= 4.4.0 < 4.4.19 | 4.4.19 |
| wireshark | wireshark | >= 4.6.0 < 4.6.9 | 4.6.9 |
| wireshark_foundation | wireshark | >= 4.4.0 < 4.4.19 | 4.4.19 |
| wireshark_foundation | wireshark | >= 4.6.0 < 4.6.9 | 4.6.9 |
CVSS provenance
nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
vendor_redhat4.7MEDIUM
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Red Hat
wireshark: Heap-based Buffer Overflow in Wireshark
vendor_redhat·2026-09-29·CVSS 4.7
CVE-2026-95393 [MEDIUM] CWE-787 wireshark: Heap-based Buffer Overflow in Wireshark
wireshark: Heap-based Buffer Overflow in Wireshark
A flaw was found in Wireshark's CSN.1 (Concrete Syntax Notation One) protocol dissector. By transmitting malformed network packets or providing a crafted packet capture file, an attacker can trigger a heap-based buffer overflow. This vulnerability causes the application to crash, leading to a Denial of Service (DoS).
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Package: wireshark (Red Hat Enterprise Linux 10) - Fix deferred
Package: wireshark (Red Hat Enterprise Linux 6) - Not affected
Package: wireshark (Red Hat Enterprise Linux 7) - N
GitLab
Heap-based Buffer Overflow in Wireshark
vendor_gitlab·2026-09-29·CVSS 4.7
CVE-2026-95393 [MEDIUM] CWE-122 Heap-based Buffer Overflow in Wireshark
Heap-based Buffer Overflow in Wireshark
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Affected products: Wireshark
Affected versions: >=4.6.0, =4.4.0, <4.4.19 (affected)
Solution: Upgrade to version 4.6.9 or above
Credit: Security research assessment of Wireshark internals (Feng Xue)
VulDB
Wireshark up to 4.4.18/4.6.8 Dissector denial of service (Nessus ID 362908)
vuldb·2026-10-05·CVSS 4.7
CVE-2026-95393 [MEDIUM] Wireshark up to 4.4.18/4.6.8 Dissector denial of service (Nessus ID 362908)
A vulnerability described as problematic has been identified in Wireshark up to 4.4.18/4.6.8. Impacted is an unknown function of the component Dissector. Executing a manipulation can lead to denial of service.
This vulnerability is tracked as CVE-2026-95393. The attack can be launched remotely. No exploit exists.
Upgrading the affected component is recommended.
GHSA
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
ghsa_unreviewed·2026-09-29
CVE-2026-95393 [MEDIUM] CWE-122 CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-95393 wireshark: Heap-based Buffer Overflow in Wireshark [fedora-all]
bugzilla·2026-09-29·CVSS 4.7
CVE-2026-95393 [MEDIUM] CVE-2026-95393 wireshark: Heap-based Buffer Overflow in Wireshark [fedora-all]
CVE-2026-95393 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.
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Bugzilla
CVE-2026-95393 wireshark: Heap-based Buffer Overflow in Wireshark
bugzilla·2026-09-29·CVSS 4.7
CVE-2026-95393 [MEDIUM] CVE-2026-95393 wireshark: Heap-based Buffer Overflow in Wireshark
CVE-2026-95393 wireshark: Heap-based Buffer Overflow in Wireshark
CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
2026-09-29
Published