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Fencer Intel
medium 5.1

CVE-2026-17503 json

This Power System update is being released to address

published last mo. modified last mo. also EUVD-2026-85889

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 is affected by a vulnerability in the partition firmware runtime boot configuration. An attacker with root access to a partition can maliciously alter partition nvram, causing the partition to fail to boot. This condition persists until operator intervention — deleting and recreating the partition configuration — to restore normal operation. Successful exploitation results in an integrity and availability impact.

Patch / fix

  • ibm power_system_s1122_(9824-22a)_firmware fw1110.32, fw1120.02
  • ibm power_system_s1124_(9824-42a)_firmware fw1110.32, fw1120.02
  • ibm power_system_s1122s_(9824-22b)_firmware fw1110.32, fw1120.02
  • ibm power_system_s1114_(9824-41b)_firmware fw1110.32, fw1120.02
  • ibm power_system_l1122_(9856-22h)_firmware fw1110.32, fw1120.02
  • ibm power_system_l1124_(9856-42h)_firmware fw1110.32, fw1120.02
  • ibm power_system_e1150_(9043-mru)_firmware fw1110.32, fw1120.02
  • ibm power_system_s1112_(9242-21b)_firmware fw1120.02
  • ibm power_system_s1112_(9242-21t)_firmware fw1120.02
  • ibm power_system_e1080_(9080-hex)_firmware fw1060.82
  • ibm power_system_s1022_(9105-22a)_firmware fw1060.82
  • ibm power_system_s1024_(9105-42a)_firmware fw1060.82
  • ibm power_system_s1022s_(9105-22b)_firmware fw1060.82
  • ibm power_system_s1014_(9105-41b)_firmware fw1060.82
  • ibm power_system_l1022_(9786-22h)_firmware fw1060.82
  • ibm power_system_l1024_(9786-42h)_firmware fw1060.82
  • ibm power_system_e1050_(9043-mrx)_firmware fw1060.82
  • ibm power_system_s1012_(9028-21b)_firmware fw1060.82
  • ibm power_system_e1180_(9080-heu)_firmware fw1110.32, fw1120.02
  • ibm power_system_s922_(9009-22g)_firmware fw950.h4

Is CVE-2026-17503 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Affected products

  • IBM PowerVM Hypervisor

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.