CVE-2026-89924

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Fix old_data leak in guest debug error path

__import_wp_info() allocates a per-watchpoint old_data buffer to back up

the original guest memory contents. If a later watchpoint of the same

KVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data()

jumps to the error label, which frees the wp_info array but not the

old_data buffers of the entries that were imported successfully. Up to

MAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed

request, and the request can be repeated.

Create error handling for cleaning up all created old_data memory

areas.