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Wireshark sharkd CVE-2026-76890

| EUVDEUVD-2026-63161 LOW
Expired Pointer Dereference (CWE-825)
2026-08-19 GitLab GHSA-m8wh-xh8f-8mxc
Denial Of Service Wireshark
3.1
CVSS 3.1 · Vendor: GitLab

Severity by source

Vendor (GitLab) PRIMARY
3.1 LOW
AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
vuln.today AI
3.1 LOW

Network-accessible sharkd daemon justifies AV:N; crash requires precise conditions (AC:H) and user interaction (UI:R); impact is daemon crash only (A:L), no confidentiality or integrity effect.

3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
4.0 AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Patch available
Aug 20, 2026 - 01:01 EUVD
Analysis Generated
Aug 19, 2026 - 23:29 vuln.today

DescriptionCVE.org

Crash in sharkd in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

AnalysisAI

Denial of service via a crash in sharkd, the Wireshark daemon component, affects the Wireshark Foundation's Wireshark versions 4.6.0-4.6.7 and 4.4.0-4.4.18. The root cause is CWE-825 (Expired Pointer Dereference), where a crafted network request or packet capture can trigger use of an expired pointer, crashing the sharkd process and producing a denial of service. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify network-accessible sharkd endpoint
Delivery
Craft malformed API request or capture file
Exploit
Induce user interaction to trigger processing
Execution
Expired pointer dereference occurs in sharkd
Persist
Daemon process crashes
Impact
Denial of service for dependent analysis sessions
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the sharkd daemon is explicitly running and accessible over a network interface - sharkd is not started by default in standard Wireshark GUI or CLI installations and must be deliberately launched or deployed as a service. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L) yields a score of 3.1, accurately reflecting low practical risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with access to a network-exposed sharkd endpoint crafts a malformed API request or packet capture file designed to trigger the expired pointer dereference condition within the daemon. Delivering this input - potentially requiring coordination with a user action such as loading a capture - causes sharkd to crash, interrupting any active packet analysis sessions or API consumers relying on the daemon. …
Remediation Users running Wireshark 4.6.0-4.6.7 or 4.4.0-4.4.18 should upgrade to the next patched release per the official Wireshark security advisory at https://www.wireshark.org/security/wnpa-sec-2026-65.html; exact fixed version numbers are not confirmed in the available intelligence data and should be verified from that advisory before deploying. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-76890 vulnerability details – vuln.today
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