🛡️ CVE-2024-43819 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

kvm: s390: Reject memory region operations for ucontrol VMs

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.

[[email protected]: commit message spelling fix, subject prefix fix]

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2024-43819 is recorded against 2 packages.

  • kernel (from 3.4.0 up to 6.10.3)
  • linux-kernel (from 3.4 up to 6.10.3)

Timeline and source

Published on 17 August 2024 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-43819 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-08-17
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 3.4.0 6.10.3
linux-kernel 3.4 6.10.3

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