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CVE-2026-96423

Опубликовано: 29 сент. 2026
Источник: redhat
CVSS3: 5.5
EPSS Низкий

Описание

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

A flaw was found in Wireshark. A heap-based buffer overflow in the X11 protocol dissector allows an attacker to cause a Denial of Service (DoS) by injecting malformed packets or providing a crafted capture file. Successful exploitation leads to an application crash, disrupting network packet inspection.

Меры по смягчению последствий

Disable the X11 protocol dissector if analyzing network traffic that does not require X11 packet decoding. For command-line analysis using tshark, disable the protocol at runtime:

tshark --disable-protocol x11 -r <capture_file>

For persistent user configuration, add the protocol identifier to the disabled protocols file:

mkdir -p ~/.config/wireshark echo "x11" >> ~/.config/wireshark/disabled_protos

In the Wireshark graphical interface, the dissector can be disabled by navigating to Analyze > Enabled Protocols, searching for "X11", unchecking the protocol entry, and clicking OK. Caveats: Disabling this dissector prevents Wireshark from decoding and analyzing X11 protocol traffic. Running Wireshark sessions must be restarted for configuration file changes to take effect. Additionally, avoid opening capture files obtained from untrusted sources and avoid running packet capture utilities with elevated root privileges.

Затронутые пакеты

ПлатформаПакетСостояниеРекомендацияРелиз
Red Hat Enterprise Linux 10wiresharkFix deferred
Red Hat Enterprise Linux 6wiresharkNot affected
Red Hat Enterprise Linux 7wiresharkNot affected
Red Hat Enterprise Linux 8wiresharkNot affected
Red Hat Enterprise Linux 9wiresharkNot affected

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Дополнительная информация

Статус:

Moderate
Дефект:
CWE-787
https://bugzilla.redhat.com/show_bug.cgi?id=2543022wireshark: Heap-based Buffer Overflow in Wireshark

EPSS

Процентиль: 4%
0.00141
Низкий

5.5 Medium

CVSS3

Связанные уязвимости

CVSS3: 7.1
ubuntu
около 1 месяца назад

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

CVSS3: 7.1
nvd
около 1 месяца назад

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

CVSS3: 7.1
debian
около 1 месяца назад

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 all ...

CVSS3: 5.5
github
около 1 месяца назад

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

CVSS3: 5.5
fstec
2 месяца назад

Уязвимость функции keycode2keysymString() анализатора трафика компьютерных сетей Wireshark, позволяющая нарушителю вызывать отказ в обслуживании

EPSS

Процентиль: 4%
0.00141
Низкий

5.5 Medium

CVSS3