Buffer Over-read in Wireshark
Published Feb 25, 2026
7.5
HIGHCVSS 3.1
EPSS 0.26%
Description
RF4CE Profile protocol dissector crash in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 allows denial of service
Affected products
-
- Version 4.4.0StatusaffectedConstraints<4.4.14
- Version 4.6.0StatusaffectedConstraints<4.6.4
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wireshark Foundation | Wireshark | n/a |
|
No data.
Red Hat Enterprise Linux 10
wireshark-1:4.4.2-4.el10_1.4
Fixed · RHSA-2026:9666
Red Hat Enterprise Linux 10.0 Extended Update Support
wireshark-1:4.4.2-3.el10_0.4
Fixed · RHSA-2026:26182
Red Hat Enterprise Linux 6
wireshark
Not affected
Red Hat Enterprise Linux 7
wireshark
Not affected
Red Hat Enterprise Linux 8
wireshark
Not affected
Red Hat Enterprise Linux 9
wireshark
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | wireshark-1:4.4.2-4.el10_1.4 | Fixed | RHSA-2026:9666 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | wireshark-1:4.4.2-3.el10_0.4 | Fixed | RHSA-2026:26182 |
| Red Hat Enterprise Linux 6 | wireshark | Not affected | n/a |
| Red Hat Enterprise Linux 7 | wireshark | Not affected | n/a |
| Red Hat Enterprise Linux 8 | wireshark | Not affected | n/a |
| Red Hat Enterprise Linux 9 | wireshark | Not affected | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to version 4.6.4 or above
Red Hat statement
This issue will cause a crash in Wireshark with no other security impact. Also, this flaw can only be exploited when a malformed pcap file is processed. Due to these reasons, this vulnerability has been rated with a moderate severity.
Red Hat mitigation
If the RF4CE Profile 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. See the links below for instructions to disable a protocol in Wireshark, specifically the "Control Protocol Dissection" section and the "disabled_protos" configuration file option. https://www.wireshark.org/docs/wsug_html_chunked/ChCustProtocolDissectionSection.html https://www.wireshark.org/docs/wsug_html_chunked/ChAppFilesConfigurationSection.html
References (6)
- https://access.redhat.com/security/cve/CVE-2026-3203 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2442639 Issue Tracking
- https://gitlab.com/wireshark/wireshark/-/issues/21009 issue-trackingpermissions-requiredIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-3203
- https://www.cve.org/CVERecord?id=CVE-2026-3203
- https://www.wireshark.org/security/wnpa-sec-2026-07.html Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-3203 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2442639 | Issue Tracking | |
| https://gitlab.com/wireshark/wireshark/-/issues/21009 | issue-trackingpermissions-requiredIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-3203 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-3203 | ||
| https://www.wireshark.org/security/wnpa-sec-2026-07.html | Vendor Advisory |
Change history (0)
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