Vulnerability details
CVE-2026-18871
IBM PowerVM Hypervisor
Power System Buffer Overflow
CVSS 3.1
7.3High
Official description
IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, and FW1060.00 through FW1060.80 is affected by a vulnerability in host firmware configuration parsing. An attacker with authenticated service-level access to the service processor can write specially crafted configuration data, causing the host firmware boot stack to crash with possible memory corruption during system initialisation, resulting in an integrity and availability impact to the managed system.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.3High | 3.1 | CVEProject cvelistV5 (CNA) (ibm) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| IBM | PowerVM Hypervisor | FW1120.00 | CVEProject cvelistV5 (CNA) |
| IBM | PowerVM Hypervisor | FW1060.00 ≤ v ≤ FW1060.80 | CVEProject cvelistV5 (CNA) |
| IBM | PowerVM Hypervisor | FW1110.00 ≤ v ≤ FW1110.30 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://www.ibm.com/support/pages/node/7283238 vendor-advisorypatch
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Details
- Published
- 2026-08-19
- Last updated
- 2026-08-20
- State
- Published
- Assigner (CNA)
- ibm
Exploit prediction (EPSS)
0.14%
Probability of exploitation in 30 days
3.3%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-121Stack-based Buffer Overflow