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Vulnerability · Published Oct 21, 2024 · Assigned by Linux

CVE-2022-49000iommu/vt-d: Fix PCI device refcount leak in has_external_pci()

Medium 5.5

In plain English

A medium-severity security flaw 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 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 84.1% 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: iommu/vt-d: Fix PCI device refcount leak in has_external_pci() for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() before 'return true' to avoid reference count leak.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.0.12-1DEBIAN-CVE-2022-49000
Debian:13linux6.0.12-1DEBIAN-CVE-2022-49000
Debian:14linux6.0.12-1DEBIAN-CVE-2022-49000
Ubuntu:22.04:LTSlinux5.15.0-67.74UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-aws5.15.0-1031.35UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure5.15.0-1034.41UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1034.41.1UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gcp5.15.0-1030.37UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gke5.15.0-1028.33UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1016.21UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-ibm5.15.0-1026.29UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1026.31UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-kvm5.15.0-1029.34UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-67.74UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1023.23UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oracle5.15.0-1030.36UBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-raspi5.15.0-1025.27UBUNTU-CVE-2022-49000
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49000
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49000

Affected products (as reported)

VendorProductVersions
Linux Linux 89a6079df791aeace2044ea93be1b397195824ec – before 10ed7655a17f6a3eaecd1293830488259ccd572389a6079df791aeace2044ea93be1b397195824ec – before b6eea8b2e858a20ad58ac62dc2de90fea2413f9489a6079df791aeace2044ea93be1b397195824ec – before 17f67414718e6aba123335a33b7d15aa594fff3489a6079df791aeace2044ea93be1b397195824ec – before afca9e19cc720bfafc75dc5ce429c185ca93f31d
Linux Linux 5.0

References