CVE-2018-6836

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-02-08 · updated 2026-06-17
Weakness: CWE-763

Description

The netmonrec_comment_destroy function in wiretap/netmon.c in Wireshark through 2.4.4 performs a free operation on an uninitialized memory address, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact.

Affected products

Wireshark Foundation Wireshark: through 2.4.4

References

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14397
https://code.wireshark.org/review/#/c/25660/
https://code.wireshark.org/review/#/c/25660/2/wiretap/netmon.c
https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=28960d79cca262ac6b974f339697b299a1e28fef
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14397
https://code.wireshark.org/review/#/c/25660/
https://code.wireshark.org/review/#/c/25660/2/wiretap/netmon.c
https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=28960d79cca262ac6b974f339697b299a1e28fef

Get alerted when CVE-2018-6836 or the next vulnerability affects your stack