CVE-2024-43819

MediumCVSS 5.5/10Last modified Oct 30, 2026

Description

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

kvm: s390: Reject memory region operations for ucontrol VMs

This change rejects the KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM. This is necessary since ucontrol VMs have kvm->arch.gmap set to 0 and would thus result in a null pointer dereference further in. Memory management needs to be performed in userspace and using the ioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP.

Also improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2.

[frankja@linux.ibm.com: commit message spelling fix, subject prefix fix]

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 27e0393f15fc8bc855c6a888387ff5ffd2181089, < 8a1bbff443a5a22c466d11cbefca9cb361306a9b; >= 27e0393f15fc8bc855c6a888387ff5ffd2181089, < 705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7; >= 27e0393f15fc8bc855c6a888387ff5ffd2181089, < 49c9945c054df4c22008e2bf87ca74d3e2507aa6; >= 27e0393f15fc8bc855c6a888387ff5ffd2181089, < 7816e58967d0e6cadce05c8540b47ed027dc2499
LinuxLinux3.4

References

Timeline

Published
Aug 17, 2024
Last modified
Oct 30, 2026
NVD status
Modified

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