NULL pointer dereference in Wireshark
Priority LOW 31CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
GQUIC dissector crash in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial of service via packet injection or crafted capture file
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01001 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Wireshark (Wireshark Foundation): 4.0.5, 3.6.13Red Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Wireshark Foundation | Wireshark | 4.0.0 to before 4.0.5; 3.6.0 to before 3.6.13 | 4.0.5, 3.6.13 | Patch available | CNA |
- Wireshark VendorWireshark Foundation Affected 4.0.0 to before 4.0.5; 3.6.0 to before 3.6.13 Fixed in 4.0.5, 3.6.13 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* | 3.6.0 to before 3.6.13; 4.0.0 to before 4.0.5 | Vulnerable | Wireshark Foundation |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
- cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* Versions 3.6.0 to before 3.6.13; 4.0.0 to before 4.0.5 Vulnerable ·Wireshark Foundation
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA Wireshark (Wireshark Foundation) Fixed in 4.0.5, 3.6.13
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Wireshark — FEDORA-2023-f70fbf64cb
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-01874 Uncontrolled resource consumption in WiresharkPriority MEDIUM 40
- TI-2023-01875 LISP dissector large loop in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial…Priority LOW 36
- Advisory ·
Wireshark — FEDORA-2023-7af3ad9ffe
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-01874 Uncontrolled resource consumption in WiresharkPriority MEDIUM 40
- TI-2023-01875 LISP dissector large loop in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial…Priority LOW 36
Show 1 more group
- Advisory ·
Wireshark — FEDORA-2023-203eff67e0
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-01874 Uncontrolled resource consumption in WiresharkPriority MEDIUM 40
- TI-2023-01875 LISP dissector large loop in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial…Priority LOW 36
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-1994
- 2026-10-03 Alias added: GHSA-737h-r3q7-c58r
References
Advisory 8
More Wireshark Foundation Wireshark vulnerabilities
- TI-2026-53718 Heap-based Buffer Overflow in Wireshark CVSS 3.1CRITICAL 9.8
- TI-2026-63612 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.8
- TI-2024-16149 A buffer overflow in Wireshark before 4.2.0 allows a remote attacker to cause a denial of… CVSS 3.1HIGH 7.5
- TI-2010-00291 Multiple buffer overflows in the LWRES dissector in Wireshark 0.9.15 through 1.0.10 and… CVSS 2.0HIGH 7.5
- TI-2026-63614 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.1
- TI-2014-01823 Buffer overflow in the mpeg_read function in wiretap/mpeg.c in the MPEG parser in… CVSS 2.0HIGH 9.3
Sources
- CVE-2023-1994 · CVE Program
- CVE-2023-1994 · NVD
- FIRST EPSS
- GHSA-737h-r3q7-c58r · GitHub Advisory Database · CC BY 4.0
- CVE-2023-1994 · Red Hat security data · CC BY 4.0
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