CVE-2026-89921
KVM: s390: Zero initialize data structures for inject_pfault_token
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
| Last Updated | Oct 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
383d0b050106abecb82f43101cac94fa423af5cd < 3da26db3323cbccf509005fdbc4ebae842d323cd 383d0b050106abecb82f43101cac94fa423af5cd < 5b0ae4443383fbacd905522f0c95ad6c85a3b43e 383d0b050106abecb82f43101cac94fa423af5cd < 7090818ba774d254eba80979c2d4da23d91de02f 383d0b050106abecb82f43101cac94fa423af5cd < ab1a8a3c9971200938093370da4c67d4427c25f2 383d0b050106abecb82f43101cac94fa423af5cd < b8abc760fa18a389319d977834a30550b3ec18e8 383d0b050106abecb82f43101cac94fa423af5cd < 9b046de62b8098af6e2ba820b125ec9dc5f162c8 383d0b050106abecb82f43101cac94fa423af5cd < 134f235e0e8de54611a72d3cc3f63e5f31246baa 383d0b050106abecb82f43101cac94fa423af5cd < 4e2c7f7cbc27418f9a290399b986c1b85ff93b90
Linux / Linux
3.19
References
git.kernel.org: https://git.kernel.org/stable/c/3da26db3323cbccf509005fdbc4ebae842d323cd git.kernel.org: https://git.kernel.org/stable/c/5b0ae4443383fbacd905522f0c95ad6c85a3b43e git.kernel.org: https://git.kernel.org/stable/c/7090818ba774d254eba80979c2d4da23d91de02f git.kernel.org: https://git.kernel.org/stable/c/ab1a8a3c9971200938093370da4c67d4427c25f2 git.kernel.org: https://git.kernel.org/stable/c/b8abc760fa18a389319d977834a30550b3ec18e8 git.kernel.org: https://git.kernel.org/stable/c/9b046de62b8098af6e2ba820b125ec9dc5f162c8 git.kernel.org: https://git.kernel.org/stable/c/134f235e0e8de54611a72d3cc3f63e5f31246baa git.kernel.org: https://git.kernel.org/stable/c/4e2c7f7cbc27418f9a290399b986c1b85ff93b90