CVE Tools
Sign in

CVE-2022-3559

Exim Regex use after free

Published: Oct 17, 2022Updated: Nov 3, 2025 Sources: CVE List NVD BDUCWE-119
NVD MITRE
4.6CVSSMEDIUM
EPSS Score
3.7%
Top 11.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability.

CVSS Vector Breakdown

AV:AAC:HPR:LUI:NS:UC:LI:LA:L
Exploitability
AV:AAttack Vector
Adjacent
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-119CWE-416

Affected Products

eximexim
On-prem
Communications / email-server-client
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
Astra Linux Special Edition для «Эльбрус»ООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
openSUSE TumbleweedNovell Inc.
On-premOS
Operating Systems / linux-distro
eximoss-projectCommunications
fedoraprojectoss-projectUSOperating Systemsaka fedora project
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
novell inc.commercialUSOperating Systems
and 8 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://bugs.exim.org/show_bug.cgi?id=2915
bugs.exim.org
https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2
git.exim.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
lists.fedoraproject.org
and 17 more references View all →

Timeline

Published
Oct 17, 2022
Last Updated
Nov 3, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2022-3559 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows