KVM: s390: Zero initialize data structures for inject_pfault_token (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
References
- https://git.kernel.org/stable/c/3da26db3323cbccf509005fdbc4ebae842d323cd
- https://git.kernel.org/stable/c/5b0ae4443383fbacd905522f0c95ad6c85a3b43e
- https://git.kernel.org/stable/c/7090818ba774d254eba80979c2d4da23d91de02f
- https://git.kernel.org/stable/c/ab1a8a3c9971200938093370da4c67d4427c25f2
- https://git.kernel.org/stable/c/b8abc760fa18a389319d977834a30550b3ec18e8
- https://git.kernel.org/stable/c/9b046de62b8098af6e2ba820b125ec9dc5f162c8
- https://git.kernel.org/stable/c/134f235e0e8de54611a72d3cc3f63e5f31246baa
- https://git.kernel.org/stable/c/4e2c7f7cbc27418f9a290399b986c1b85ff93b90
European references
- ENISA EUVD · EUVD-2026-80521
- GCVE · GCVE-0-2026-89921
CERT-FR advisories
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1374 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 383d0b050106abecb82f43101cac94fa423af5cd < 3da26db3323cbccf509005fdbc4ebae842d323cd ; affected 383d0b050106abecb82f43101cac94fa423af5cd < 5b0ae4443383fbacd905522f0c95ad6c85a3b43e ; affected 383d0b050106abecb82f43101cac94fa423af5cd < 7090818ba774d254eba80979c2d4da23d91de02f ; affected 383d0b050106abecb82f43101cac94fa423af5cd < ab1a8a3c9971200938093370da4c67d4427c25f2 ; affected 383d0b050106abecb82f43101cac94fa423af5cd < b8abc760fa18a389319d977834a30550b3ec18e8 ; affected 383d0b050106abecb82f43101cac94fa423af5cd < 9b046de62b8098af6e2ba820b125ec9dc5f162c8 |
| Linux · Linux | affected 3.19 ; unaffected 0 < 3.19 ; unaffected 5.10.273 ≤ 5.10.* ; unaffected 5.15.224 ≤ 5.15.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.160 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |