A use-after-free flaw in the sandbox container implemented in cmdguard.sys in Comodo Antivirus 12.0.0.6870 can be triggered due to a race c…

published 2019-08-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-5844

cvss: 4.7; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

A use-after-free flaw in the sandbox container implemented in cmdguard.sys in Comodo Antivirus 12.0.0.6870 can be triggered due to a race condition when handling IRP_MJ_CLEANUP requests in the minifilter for directory change notifications. This allows an attacker to cause a denial of service (BSOD) when an executable is run inside the container.

Patch / fix

links 1

github.com/SouhailHammou/Exploits/blob/master/CVE-2019-14694%20-%20Co… patch

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

rce4fun.blogspot.com http://rce4fun.blogspot.com/2019/08/comodo-antivirus-sandbox-race-condition.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	4.7	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.7	AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
CWE-416 Use After Free

References

github.com /SouhailHammou/Exploits/blob/master/CVE-2019-14694%20-%20Comodo%20AV%20Sandbox%20Race%20Condition%20UAF/comodo
patch
rce4fun.blogspot.com /2019/08/comodo-antivirus-sandbox-race-condition.html
exploit, third-party-advisory

Sources

CVE List CVE-2019-14694
NVD CVE-2019-14694

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary