In the Linux kernel, the following vulnerability has been resolved:
KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted.
Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade perfUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernelUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-tools | Aug 2, 2024 | Feb 29, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 29, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade python3-perfUpgrade kernel-headersUpgrade kernelUpgrade perfUpgrade python-perfUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-develUpgrade kernel-tools-libs | Jul 23, 2024 | Feb 29, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 29, 2024 |
| Suse | — | Upgrade kernel-macrosUpgrade kernel-default-extraUpgrade kernel-default-manUpgrade kernel-defaultUpgrade kernel-develUpgrade kernel-symsUpgrade kernel-64kb-develUpgrade kernel-default-baseUpgrade kernel-preemptUpgrade kernel-azure-develUpgrade kernel-docsUpgrade kernel-preempt-develUpgrade kernel-devel-azureUpgrade kernel-syms-azureUpgrade kernel-zfcpdumpUpgrade kernel-azureUpgrade kernel-source-azureUpgrade kernel-64kbUpgrade reiserfs-kmp-defaultUpgrade kernel-sourceUpgrade kernel-azure-baseUpgrade kernel-default-develUpgrade kernel-obs-build | Aug 9, 2024 | Feb 29, 2024 |
| Ubuntu | — | Upgrade linux-hwe-5.4Upgrade linux-oracleUpgrade linux-gkeopUpgrade linux-gcp-5.4Upgrade linux-azureUpgrade linux-azure-5.4Upgrade linux-raspi-5.4Upgrade linux-kvmUpgrade linux-awsUpgrade linux-raspiUpgrade linux-oracle-5.4Upgrade linux-bluefieldUpgrade linux-aws-5.4Upgrade linux-gcpUpgrade linuxUpgrade linux-fips | Nov 19, 2024 | Feb 29, 2024 |
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