Out-of-bounds write in IBM 8335-GTB
Priority LOW 26CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
IBM Host firmware for LC-class Systems is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A remote privileged attacker could exploit this vulnerability and cause a denial of service. IBM X-Force ID: 190037.
Why it matters now
EPSS 0.01519 74th percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| IBM | 8335-GTB | OP820 | — | No fix listed | CNA |
| IBM | 8335-GTA | OP820 | — | No fix listed | CNA |
| IBM | 8335-GCA | OP820 | — | No fix listed | CNA |
- 8335-GTB VendorIBM Affected OP820 Fixed in — No fix listed CNA
- 8335-GTA VendorIBM Affected OP820 Fixed in — No fix listed CNA
- 8335-GCA VendorIBM Affected OP820 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:ibm:8335-gca_firmware:op820:*:*:*:*:*:*:* | op820 | Vulnerable | IBM |
| cpe:2.3:h:ibm:8335-gca:-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:8335-gta_firmware:op820:*:*:*:*:*:*:* | op820 | Vulnerable | IBM |
| cpe:2.3:h:ibm:8335-gta:-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:8335-gtb_firmware:op820:*:*:*:*:*:*:* | op820 | Vulnerable | IBM |
| cpe:2.3:h:ibm:8335-gtb:-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
- cpe:2.3:o:ibm:8335-gca_firmware:op820:*:*:*:*:*:*:* Versions op820 Vulnerable ·IBM
- cpe:2.3:h:ibm:8335-gca:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:8335-gta_firmware:op820:*:*:*:*:*:*:* Versions op820 Vulnerable ·IBM
- cpe:2.3:h:ibm:8335-gta:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:8335-gtb_firmware:op820:*:*:*:*:*:*:* Versions op820 Vulnerable ·IBM
- cpe:2.3:h:ibm:8335-gtb:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-4839
- 2026-10-03 Alias added: GHSA-wm8q-g9p3-9xhm
References
More IBM 8335-gca Firmware vulnerabilities
- TI-2021-10387 Path traversal in IBM 8335-GTB CVSS 3.1MEDIUM 6.5
Sources
- CVE-2020-4839 · CVE Program
- CVE-2020-4839 · NVD
- FIRST EPSS
- GHSA-wm8q-g9p3-9xhm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences