CVE-2026-15171: NULL Pointer Dereference in Wireshark
Published Jul 8, 2026
·Updated
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
Affected Software
3 affected components
Wireshark Wireshark>=4.6.0<=4.6.6, >=4.4.0<=4.4.16
Wireshark Wireshark>=4.4.0<4.4.17
Wireshark Wireshark>=4.6.0<4.6.7
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
wiresharkto a version that resolves this vulnerability.Fixed in 4.6.7
Event History
Jul 8, 2026
CVE Published
via MITRE·08:51 PM
Data Sourced
via MITRE·08:51 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-15171?
The severity of CVE-2026-15171 is medium with a score of 5.5.
2
What risks are associated with CVE-2026-15171?
CVE-2026-15171 poses a risk of denial of service due to a NULL pointer dereference vulnerability.
3
Which versions of Wireshark are affected by CVE-2026-15171?
Wireshark versions 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 are affected by CVE-2026-15171.
4
How do I fix CVE-2026-15171?
To fix CVE-2026-15171, upgrade to a version of Wireshark that is not vulnerable, such as those released after 4.6.6 and 4.4.16.
5
What kind of attack does CVE-2026-15171 enable?
CVE-2026-15171 enables a denial of service attack that can crash the SSH protocol dissector in Wireshark.