Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 383d0b050106abecb82f43101cac94fa423af5cd before ab1a8a3c9971200938093370da4c67d4427c25f2; affected 383d0b050106abecb82f43101cac94fa423af5cd before b8abc760fa18a389319d977834a30550b3ec18e8; affected 383d0b050106abecb82f43101cac94fa423af5cd before 9b046de62b8098af6e2ba820b125ec9dc5f162c8; affected 383d0b050106abecb82f43101cac94fa423af5cd before 134f235e0e8de54611a72d3cc3f63e5f31246baa; affected 383d0b050106abecb82f43101cac94fa423af5cd before 4e2c7f7cbc27418f9a290399b986c1b85ff93b90 |
| Linux / Linux | affected 3.19; unaffected 0 before 3.19; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- 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