CVE-2024-43819

MEDIUM EPSS 9.5%
Published Aug 17, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 17, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
9.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

VendorProductVersionRange
linuxlinux_kernel*≥3.4  –  <6.10.3

References 2

  • git.kernel.org https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499
    Patch