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-toolsUpgrade python-perfUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade kernel-headersUpgrade perfUpgrade python-perf-debuginfoUpgrade kernel-tools-devel | Aug 2, 2024 | Feb 29, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 29, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernel-toolsUpgrade python-perfUpgrade bpftoolUpgrade kernelUpgrade kernel-tools-libsUpgrade perfUpgrade python3-perfUpgrade kernel-headersUpgrade kernel-devel | Jul 23, 2024 | Feb 29, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 29, 2024 |
| Suse | — | Upgrade kernel-obs-buildUpgrade kernel-preempt-develUpgrade kernel-zfcpdumpUpgrade kernel-syms-azureUpgrade reiserfs-kmp-defaultUpgrade kernel-azureUpgrade kernel-64kbUpgrade kernel-source-azureUpgrade kernel-devel-azureUpgrade kernel-default-develUpgrade kernel-sourceUpgrade kernel-azure-baseUpgrade kernel-develUpgrade kernel-64kb-develUpgrade kernel-default-manUpgrade kernel-macrosUpgrade kernel-symsUpgrade kernel-azure-develUpgrade kernel-default-baseUpgrade kernel-defaultUpgrade kernel-default-extraUpgrade kernel-preemptUpgrade kernel-docs | Aug 9, 2024 | Feb 29, 2024 |
| Ubuntu | — | Upgrade linux-awsUpgrade linux-gcp-5.4Upgrade linux-raspi-5.4Upgrade linux-oracleUpgrade linux-azure-5.4Upgrade linux-azureUpgrade linux-gkeopUpgrade linux-hwe-5.4Upgrade linux-kvmUpgrade linux-raspiUpgrade linux-bluefieldUpgrade linux-fipsUpgrade linux-aws-5.4Upgrade linuxUpgrade linux-gcpUpgrade linux-oracle-5.4 | Nov 19, 2024 | Feb 29, 2024 |
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