CVE-2026-17091: IBM Power System e1050 (9043-Mrx) Firmware

High severity, CVSS 8.4. EPSS: 0.1% chance of exploitation in the next 30 days.

IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the PowerVM hypervisor call interface. An attacker with root access to a guest partition can issue a specially crafted hypervisor call to inject an arbitrary amount of data into hypervisor or partition memory, resulting in either a crash causing a full platform re-IPL and terminating all hosted partitions, or corruption of hypervisor or partition memory. The PowerVM hypervisor will restart automatically; however, repeated exploitation could result in a sustained availability impact. Successful exploitation results in an integrity and availability impact to the managed system.

Affected products

  • IBM Power System e1050 (9043-Mrx) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System e1080 (9080-Hex) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System e1150 (9043-Mru) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System e1180 (9080-Heu) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System e950 (9040-MR9) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • IBM Power System e980 (9080-m9s) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • IBM Power System h922 (9223-22s) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • IBM Power System h924 (9223-42s) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • IBM Power System l1022 (9786-22h) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System l1024 (9786-42h) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System l1122 (9856-22h) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System l1124 (9856-42h) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System s1012 (9028-21b) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System s1014 (9105-41b) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System s1022 (9105-22a) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System s1022s (9105-22b) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System s1024 (9105-42a) Firmware: from fw1060.00, before fw1060.81 (fixed in fw1060.81)
  • IBM Power System s1112 (9242-21b) Firmware: version fw1120.00 only
  • IBM Power System s1112 (9242-21t) Firmware: version fw1120.00 only
  • IBM Power System s1114 (9824-41b) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System s1122 (9824-22a) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System s1122s (9824-22b) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System s1124 (9824-42a) Firmware: from fw1110.00, before fw1110.31 (fixed in fw1110.31); version fw1120.00 only
  • IBM Power System s914 (9009-41g) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • IBM Power System s922 (9009-22g) Firmware: from fw950.00, before fw950.h3 (fixed in fw950.h3)
  • and 1 more

Published 2026-08-19. Last modified 2026-08-25.