# CVE-2022-49000: linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/vt-d: Fix PCI device refcount leak in has_...

CVE-2022-49000 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49000, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49000
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.12-1 | [DEBIAN-CVE-2022-49000](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49000.md) | Oct 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.0.12-1 | [DEBIAN-CVE-2022-49000](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49000.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.0.12-1 | [DEBIAN-CVE-2022-49000](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49000.md) | Oct 21, 2024 |

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