A vulnerability in the regex module used by the signature database load module of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 a
A vulnerability in the regex module used by the signature database load module of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an authenticated, local attacker to crash ClamAV at database load time, and possibly gain code execution. The vulnerability is due to improper bounds checking that may result in a multi-byte heap buffer overwflow write. An attacker could exploit this vulnerability by placing a crafted CDB ClamAV signature database file in the ClamAV database directory. An exploit could allow the attacker to run code as the clamav user.
- Published
- Aug 10, 2022
- Updated
- Jun 17, 2026
- EPSS
- 0.5% · 43th percentile
- CWE
- CWE-125
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · cisco
- 7.8
- agree
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| clamav | clamav | cpe:2.3:a:clamav:clamav |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- clamav clamavup to 0.103.5 inclusive
- clamav clamav0.104.0 and later · up to 0.104.2 inclusive
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
Cisco Clam AntiVirus (ClamAV)
- unspecified and later · up to and including 0.104.2affected
- 0.104.0 and later · before unspecifiedaffected
- unspecified and later · up to and including 0.103.5affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.12 | clamav | from 0.104.0 · before 0.103.6-r0 | 0.103.6-r0 |
| Debian:12 | clamav | before 0.103.6+dfsg-1 | 0.103.6+dfsg-1 |
| Debian:9 | clamav | before 0.103.6+dfsg-0+deb9u1 | 0.103.6+dfsg-0+deb9u1 |
| openSUSE:Tumbleweed | clamav | before 0.103.6-1.1 | 0.103.6-1.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP3 | clamav | before 0.103.6-150000.3.38.1 | 0.103.6-150000.3.38.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP3 | clamav | before 0.103.6-150000.3.38.1 | 0.103.6-150000.3.38.1 |
| SUSE:Linux Enterprise Server 12 SP5 | clamav | before 0.103.6-3.18.1 | 0.103.6-3.18.1 |
Same product
clamav: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-20032On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed:
A vulnerability in the HFS+ partition file p48Plan
- CVE-2024-20328ClamAV VirusEvent File Processing Command Injection Vulnerability46Plan
- CVE-2017-12379ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a 43Plan
- CVE-2006-1615Multiple format string vulnerabilities in the logging code in Clam AntiVirus (ClamAV) before 0.88.1 might allow remote attackers to execute 43Plan
- CVE-2017-12377ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a 42Plan
- CVE-2009-1372Stack-based buffer overflow in the cli_url_canon function in libclamav/phishcheck.c in ClamAV before 0.95.1 allows remote attackers to cause42Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:clamav | 0.103.6-r0 · Alpine:v3.12 | Package registry (OSV) |
| debian:clamav | 0.103.6+dfsg-1 · Debian:12 | Package registry (OSV) |
| opensuse:clamav | 0.103.6-150000.3.38.1 · openSUSE:Leap 15.3 | Package registry (OSV) |
| suse:clamav | 0.103.6-150000.3.38.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.