CVE-2024-43819kvm: s390: Reject memory region operations for ucontrol VMs
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
Linux Linux linux:linux (from the name) | from 27e0393f15fc8bc855c6a888387ff5ffd2181089 before 705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7; from 27e0393f15fc8bc855c6a888387ff5ffd2181089 before 49c9945c054df4c22008e2bf87ca74d3e2507aa6; from 27e0393f15fc8bc855c6a888387ff5ffd2181089 before 7816e58967d0e6cadce05c8540b47ed027dc2499 | CNA record |
linux linux_kernel linux:linux_kernel | from 3.4 before 6.10.3 | NVD |
References
- https://git.kernel.org/stable/c/705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7
- https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6patch
- https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.