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Vulnerability · Published Feb 26, 2025 · Assigned by Linux

CVE-2022-49568KVM: Don't null dereference ops->destroy

Medium 5.5

In plain English

A medium-severity null pointer dereference in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.3%top 77.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: KVM: Don't null dereference ops->destroy A KVM device cleanup happens in either of two callbacks: 1) destroy() which is called when the VM is being destroyed; 2) release() which is called when a device fd is closed. Most KVM devices use 1) but Book3s's interrupt controller KVM devices (XICS, XIVE, XIVE-native) use 2) as they need to close and reopen during the machine execution. The error handling in kvm_ioctl_create_device() assumes destroy() is always defined which leads to NULL dereference as discovered by Syzkaller. This adds a checks for destroy!=NULL and adds a missing release(). This is not changing kvm_destroy_devices() as devices with defined release() should have been removed from the KVM devices list by then.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.18.16-1DEBIAN-CVE-2022-49568
Debian:13linux5.18.16-1DEBIAN-CVE-2022-49568
Debian:14linux5.18.16-1DEBIAN-CVE-2022-49568
Ubuntu:22.04:LTSlinux5.15.0-50.56UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-aws5.15.0-1021.25UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure5.15.0-1021.26UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1024.30.1UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gcp5.15.0-1019.25UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gke5.15.0-1017.20UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1004.6UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-ibm5.15.0-1015.17UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1017.22UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-kvm5.15.0-1019.23UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-50.56UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1015.15UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oracle5.15.0-1019.24UBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-raspi5.15.0-1016.18UBUNTU-CVE-2022-49568
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49568
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49568

Affected products (as reported)

VendorProductVersions
Linux Linux 852b6d57dc7fa378019786fa84727036e56839ea – before 170465715a60cbb7876e6b961b21bd3225469da8852b6d57dc7fa378019786fa84727036e56839ea – before 3616776bc51cd3262bb1be60cc01c72e0a1959cf852b6d57dc7fa378019786fa84727036e56839ea – before e91665fbbf3ccb268b268a7d71a6513538d813ac852b6d57dc7fa378019786fa84727036e56839ea – before d4a5a79b780891c5cbdfdc6124d46fdf8d13dba1852b6d57dc7fa378019786fa84727036e56839ea – before e8bc2427018826e02add7b0ed0fc625a60390ae5
Linux Linux 3.10

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References