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Wireshark EUVDEUVD-2026-63139

| CVE-2026-76882 MEDIUM
Out-of-bounds Read (CWE-125)
2026-08-19 GitLab GHSA-4955-3c59-8gjq
Information Disclosure Buffer Overflow Denial Of Service Wireshark Red Hat Suse
4.7
CVSS 3.1 · Vendor: GitLab
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Severity by source

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

Local vector confirmed by Wireshark's file-processing model; no privileges needed to run Wireshark; user must open malicious capture; crash-only impact means zero confidentiality or integrity effect.

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

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

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

Lifecycle Timeline

3
Analysis Generated
Aug 19, 2026 - 23:25 vuln.today
Patch available
Aug 19, 2026 - 23:04 EUVD
CVE Published
Aug 19, 2026 - 22:35 cve.org
MEDIUM 4.7

DescriptionCVE.org

Bluetooth Attribute Protocol dissector crash 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 crash affects the Bluetooth Attribute Protocol (ATT) dissector in Wireshark 4.4.0-4.4.17 and 4.6.0-4.6.7, caused by an out-of-bounds read (CWE-125) when processing malformed ATT packets. Exploitation requires user interaction - specifically opening a crafted packet capture file or capturing live malicious Bluetooth traffic - and carries no code execution potential. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed Bluetooth ATT PCAP
Delivery
Deliver file to analyst machine
Exploit
Analyst opens file in Wireshark
Execution
ATT dissector reads out of bounds
Impact
Wireshark process crashes
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Vulnerability AssessmentAI

Exploitation Exploitation requires the victim to be running an affected Wireshark version (4.4.0-4.4.17 or 4.6.0-4.6.7) and to actively open a PCAP file containing crafted Bluetooth Attribute Protocol packets, or to initiate a live Bluetooth capture session during which such packets appear - both requiring explicit user interaction (UI:R). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 4.7 (Medium) accurately reflects several compounding risk-limiting factors: local attack vector (AV:L) means the malicious input must reach the analyst's own machine rather than being delivered over a network service; high attack complexity (AC:H) requires specifically structured malformed ATT content; user interaction (UI:R) demands the victim actively open or process the hostile input; and scope is unchanged (S:U), confining impact to the Wireshark process alone. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a PCAP file containing a malformed Bluetooth Attribute Protocol packet designed to trigger the out-of-bounds read, then delivers it to a network analyst via email or shared storage, or generates the malicious traffic on a shared Bluetooth-accessible network segment. When the analyst opens the file or the live capture in an unpatched Wireshark instance, the ATT dissector reads beyond its buffer boundary and crashes the application. …
Remediation Upgrade to Wireshark 4.4.18 (for 4.4.x users) or Wireshark 4.6.8 (for 4.6.x users), as indicated by EUVD-2026-63139 fix boundaries and the Wireshark Foundation advisory at https://www.wireshark.org/security/wnpa-sec-2026-73.html; the associated GitLab tracking item is at https://gitlab.com/wireshark/wireshark/-/work_items/21424. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-125 – Out-of-bounds Read

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Same technique Information Disclosure

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected

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EUVD-2026-63139 vulnerability details – vuln.today
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