In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data…
Priority LOW 27CWE-908Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-908 and the CVSS impact.
Summary
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).
Why it matters now
EPSS 0.01265 69th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:virustotal:yara:3.8.1:*:*:*:*:*:*:* | 3.8.1 | Vulnerable | Virustotal |
- cpe:2.3:a:virustotal:yara:3.8.1:*:*:*:*:*:*:* Versions 3.8.1 Vulnerable ·Virustotal
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2018-19974
- 2026-10-03 Alias added: GHSA-qgr5-73wm-7w3g
References
More Virustotal Yara vulnerabilities
- TI-2023-21588 Buffer Overflow vulnerability in VirusTotal yara v.4.3.2 allows a remote attacker to… CVSS 3.1HIGH 8.8
- TI-2021-02369 Integer overflow in libyara CVSS 3.1CRITICAL 9.1
- TI-2017-06850 libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial… CVSS 3.0HIGH 7.5
- TI-2017-05862 libyara/re.c in the regex component in YARA 3.5.0 allows remote attackers to cause a… CVSS 3.0HIGH 7.5
- TI-2016-08286 libyara/lexer.l in YARA 3.5.0 allows remote attackers to cause a denial of service (NULL… CVSS 3.0HIGH 7.5
- TI-2019-14158 In the macho_parse_file functionality in macho/macho.c of YARA 3.11.0, command_size may… CVSS 3.1HIGH 7.8
Sources
- CVE-2018-19974 · CVE Program
- CVE-2018-19974 · NVD
- FIRST EPSS
- GHSA-qgr5-73wm-7w3g · GitHub Advisory Database · CC BY 4.0
- CVE-2018-19974 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences