Out-of-bounds Read in IBM Openbmc
CVE-2026-18857
IBM OPENBMC FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, and FW1060.00 through FW1060.81 is affected by a vulnerability in the BMC firmware management interface. The host system can cause the BMC firmware management service to crash or allow a limited amount of BMC internal memory to be read, resulting in a confidentiality and availability impact to the managed system.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- IBM Openbmc
- IBM Power System E1050 \(9043-Mrx\) Firmware
- IBM Power System E1150 \(9043-Mru\) Firmware
- IBM Power System L1022 \(9786-22h\) Firmware
- IBM Power System L1024 \(9786-42h\) Firmware
- IBM Power System L1122 \(9856-22h\) Firmware
- IBM Power System L1124 \(9856-42h\) Firmware
- IBM Power System S1012 \(9028-21b\) Firmware
- IBM Power System S1014 \(9105-41b\) Firmware
- IBM Power System S1022 \(9105-22a\) Firmware
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7289253 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18857?
- CVE-2026-18857 is a low-severity vulnerability in IBM Openbmc, classified under Out-of-bounds Read. CVSS score: 3.4/10. Published 2026-09-24.
- How severe is CVE-2026-18857?
- Low severity. CVSS v3 base score is 3.4 out of 10.