CVE-2026-89921
CVE CVE-2026-89921EUVD EUVD-2026-80521Published 2026-09-16T10:32:15.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Zero initialize data structures for inject_pfault_token __kvm_inject_pfault_token() only sets .type and .u.ext.ext_params2 of the on-stack struct kvm_s390_irq but the full ext substructure is copied into the cpu local variable on inject. ext_params and pad contain stale stack values. Interrupt delivery only uses ext_params2, so nothing leaks to the guest, but a host user can use the migration ioctls to get to the data. Fix by zero-initializing the irq struct. Do the same for the inti data structure.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.18.52; patch: 7.3-rc1; patch: 7.2.5; 3.19; patch: 0; 383d0b050106abecb82f43101cac94fa423af5cd <4e2c7f7cbc27418f9a290399b986c1b85ff93b90; 383d0b050106abecb82f43101cac94fa423af5cd <9b046de62b8098af6e2ba820b125ec9dc5f162c8; 383d0b050106abecb82f43101cac94fa423af5cd <134f235e0e8de54611a72d3cc3f63e5f31246baa
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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