Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Take srcu when importing watchpoint data __import_wp_info() backs up the original guest memory contents of a watchpoint with read_guest_abs(), which is kvm_read_guest() and therefore resolves the memslot via __kvm_memslots(). That requires kvm->srcu (or kvm->slots_lock) to be held, otherwise a concurrent memslot update can free the memslots array under us once its SRCU grace period has elapsed. As this is not fast path, following lock ordering (mutex first, then srcu) take the big hammer and hold the srcu for the full import.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/4c05bf21d1806853e662cc19e744736a3408f155
- https://git.kernel.org/stable/c/6830fbc3724bf49c142aae69a4694f115fa9cedd
- https://git.kernel.org/stable/c/76f5b4ea9ed0aa5a34bda9d8a878f2c73026ec03
- https://git.kernel.org/stable/c/a4e482def8533ebace517d9f67f1465841b1f982
- https://git.kernel.org/stable/c/cc710ee45395efb4937e042960f791d33924e5f6
- https://git.kernel.org/stable/c/f8e3a9997d5ecd56ebe4b262ff424516c068fecb
FAQ
What is CVE-2026-89922?
CVE-2026-89922 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Take srcu when importing watchpoint data __import_wp_info() backs up the original guest memory contents of a watchpoint...
How severe is CVE-2026-89922?
CVE-2026-89922 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-89922?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.