RHSA-2026:58821: Important: fence-agents security update

Published Aug 24, 2026
·
Updated

The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster. Security Fix(es): pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values (CVE-2026-59886) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

51 affected componentsFixes available
redhat/fence-agents<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-aliyun-debuginfo<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-all<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-amt-ws<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-apc<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-apc-snmp<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-bladecenter<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-brocade<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-cisco-mds<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-cisco-ucs<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-common<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-compute<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-debuginfo<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-debugsource<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-drac5<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-eaton-snmp<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-emerson<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-eps<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-heuristics-ping<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-hpblade<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ibmblade<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ifmib<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ilo-moonshot<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ilo-mp<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ilo-ssh<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ilo2<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-intelmodular<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ipdu<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ipmilan<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-kdump<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-kdump-debuginfo<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-kubevirt-debuginfo<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-lpar<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-mpath<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-redfish<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-rhevm<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-rsa<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-rsb<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-sbd<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-scsi<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-virsh<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-vmware-rest<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-vmware-soap<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-wti<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ibm-powervs<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-ibm-vpc<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-kubevirt<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-nutanix-ahv<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-aliyun<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-aws<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32
redhat/fence-agents-azure-arm<4.2.1-65.el8_4.32
4.2.1-65.el8_4.32

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/fence-agents to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  2. Upgrade

    Upgrade redhat/fence-agents-aliyun-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  3. Upgrade

    Upgrade redhat/fence-agents-all to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  4. Upgrade

    Upgrade redhat/fence-agents-amt-ws to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  5. Upgrade

    Upgrade redhat/fence-agents-apc to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  6. Upgrade

    Upgrade redhat/fence-agents-apc-snmp to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  7. Upgrade

    Upgrade redhat/fence-agents-bladecenter to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  8. Upgrade

    Upgrade redhat/fence-agents-brocade to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  9. Upgrade

    Upgrade redhat/fence-agents-cisco-mds to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  10. Upgrade

    Upgrade redhat/fence-agents-cisco-ucs to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  11. Upgrade

    Upgrade redhat/fence-agents-common to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  12. Upgrade

    Upgrade redhat/fence-agents-compute to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  13. Upgrade

    Upgrade redhat/fence-agents-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  14. Upgrade

    Upgrade redhat/fence-agents-debugsource to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  15. Upgrade

    Upgrade redhat/fence-agents-drac5 to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  16. Upgrade

    Upgrade redhat/fence-agents-eaton-snmp to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  17. Upgrade

    Upgrade redhat/fence-agents-emerson to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  18. Upgrade

    Upgrade redhat/fence-agents-eps to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  19. Upgrade

    Upgrade redhat/fence-agents-heuristics-ping to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  20. Upgrade

    Upgrade redhat/fence-agents-hpblade to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  21. Upgrade

    Upgrade redhat/fence-agents-ibmblade to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  22. Upgrade

    Upgrade redhat/fence-agents-ifmib to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  23. Upgrade

    Upgrade redhat/fence-agents-ilo-moonshot to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  24. Upgrade

    Upgrade redhat/fence-agents-ilo-mp to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  25. Upgrade

    Upgrade redhat/fence-agents-ilo-ssh to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  26. Upgrade

    Upgrade redhat/fence-agents-ilo2 to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  27. Upgrade

    Upgrade redhat/fence-agents-intelmodular to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  28. Upgrade

    Upgrade redhat/fence-agents-ipdu to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  29. Upgrade

    Upgrade redhat/fence-agents-ipmilan to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  30. Upgrade

    Upgrade redhat/fence-agents-kdump to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  31. Upgrade

    Upgrade redhat/fence-agents-kdump-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  32. Upgrade

    Upgrade redhat/fence-agents-kubevirt-debuginfo to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  33. Upgrade

    Upgrade redhat/fence-agents-lpar to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  34. Upgrade

    Upgrade redhat/fence-agents-mpath to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  35. Upgrade

    Upgrade redhat/fence-agents-redfish to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  36. Upgrade

    Upgrade redhat/fence-agents-rhevm to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  37. Upgrade

    Upgrade redhat/fence-agents-rsa to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  38. Upgrade

    Upgrade redhat/fence-agents-rsb to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  39. Upgrade

    Upgrade redhat/fence-agents-sbd to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  40. Upgrade

    Upgrade redhat/fence-agents-scsi to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  41. Upgrade

    Upgrade redhat/fence-agents-virsh to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  42. Upgrade

    Upgrade redhat/fence-agents-vmware-rest to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  43. Upgrade

    Upgrade redhat/fence-agents-vmware-soap to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  44. Upgrade

    Upgrade redhat/fence-agents-wti to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  45. Upgrade

    Upgrade redhat/fence-agents-ibm-powervs to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  46. Upgrade

    Upgrade redhat/fence-agents-ibm-vpc to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  47. Upgrade

    Upgrade redhat/fence-agents-kubevirt to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  48. Upgrade

    Upgrade redhat/fence-agents-nutanix-ahv to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  49. Upgrade

    Upgrade redhat/fence-agents-aliyun to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  50. Upgrade

    Upgrade redhat/fence-agents-aws to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  51. Upgrade

    Upgrade redhat/fence-agents-azure-arm to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  52. Upgrade

    Upgrade redhat/fence-agents-gce to a version that resolves this vulnerability.

    Fixed in 4.2.1-65.el8_4.32
  53. Upgrade

    Upgrade pyasn1 to a version that resolves this vulnerability.

    Patch CVE-2026-59886
  54. Compensating control

    Apply the fence-agents security update for the fence-agents packages (remote power management scripts) that can forcibly restart and remove failed/unreachable nodes from the cluster.

Event History

Aug 24, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203