Power System Out-of-bounds Read
Priority LOW 31CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0014 3rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| IBM | Power Systems Firmware | FW950.00 – FW950.H2; OP940.00 – OP940.a1; OP940.00 – OP940.81 | — | No fix listed | CNA |
- Power Systems Firmware VendorIBM Affected FW950.00 – FW950.H2; OP940.00 – OP940.a1; OP940.00 – OP940.81 Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:ibm:power_system_s922_\(9009-22g\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_s922_\(9009-22g\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_h922_\(9223-22s\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_h922_\(9223-22s\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_s914_\(9009-41g\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_s914_\(9009-41g\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_s924_\(9009-42g\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_s924_\(9009-42g\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_h924_\(9223-42s\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_h924_\(9223-42s\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
- cpe:2.3:o:ibm:power_system_s922_\(9009-22g\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_s922_\(9009-22g\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_h922_\(9223-22s\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_h922_\(9223-22s\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_s914_\(9009-41g\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_s914_\(9009-41g\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_s924_\(9009-42g\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_s924_\(9009-42g\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_h924_\(9223-42s\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_h924_\(9223-42s\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:ibm:power_system_e950_\(9040-mr9\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_e950_\(9040-mr9\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_e980_\(9080-m9s\)_firmware:*:*:*:*:*:*:*:* | fw950.00 to before fw950.h3 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_e980_\(9080-m9s\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_ac922_\(8335-gth\)_firmware:*:*:*:*:*:*:*:* | op940 to before op940.a2 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_ac922_\(8335-gth\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_system_ac922_\(8335-gtx\)_firmware:*:*:*:*:*:*:*:* | op940 to before op940.a2 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_system_ac922_\(8335-gtx\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
| cpe:2.3:o:ibm:power_hardware_management_console_\(7063-cr2\)_firmware:*:*:*:*:*:*:*:* | op940 to before op940.82 | Vulnerable | IBM |
| cpe:2.3:h:ibm:power_hardware_management_console_\(7063-cr2\):-:*:*:*:*:*:*:* | not specified by NVD | Running on | IBM |
- cpe:2.3:o:ibm:power_system_e950_\(9040-mr9\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_e950_\(9040-mr9\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_e980_\(9080-m9s\)_firmware:*:*:*:*:*:*:*:* Versions fw950.00 to before fw950.h3 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_e980_\(9080-m9s\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_ac922_\(8335-gth\)_firmware:*:*:*:*:*:*:*:* Versions op940 to before op940.a2 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_ac922_\(8335-gth\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_system_ac922_\(8335-gtx\)_firmware:*:*:*:*:*:*:*:* Versions op940 to before op940.a2 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_system_ac922_\(8335-gtx\):-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·IBM
- cpe:2.3:o:ibm:power_hardware_management_console_\(7063-cr2\)_firmware:*:*:*:*:*:*:*:* Versions op940 to before op940.82 Vulnerable ·IBM
- cpe:2.3:h:ibm:power_hardware_management_console_\(7063-cr2\):-:*:*:*:*:*:*:* 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-2026-17042
- 2026-10-03 Alias added: GHSA-rcv3-hw8m-43fg
References
More IBM Power Hardware Management Console (7063-cr2) Firmware vulnerabilities
- TI-2026-14226 Power System Out-of-bounds Write CVSS 3.1HIGH 8.2
- TI-2026-14221 Power System Buffer Overflow CVSS 3.1HIGH 8.2
- TI-2026-14095 Power System Integer Overflow CVSS 3.1HIGH 8.2
- TI-2021-16398 Information disclosure in IBM OPENBMC CVSS 3.1HIGH 7.5
- TI-2026-14323 Power System Incorrect Authorization CVSS 3.1HIGH 8.1
Sources
- CVE-2026-17042 · CVE Program
- CVE-2026-17042 · NVD
- FIRST EPSS
- GHSA-rcv3-hw8m-43fg · 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