CVE-2022-49000iommu/vt-d: Fix PCI device refcount leak in has_external_pci()
- 5.5MediumCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 19 months later
· 19 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 84% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 89a6079df791aeace2044ea93be1b397195824ec – < 10ed7655a17f6a3eaecd1293830488259ccd5723
- affected 89a6079df791aeace2044ea93be1b397195824ec – < b6eea8b2e858a20ad58ac62dc2de90fea2413f94
- affected 89a6079df791aeace2044ea93be1b397195824ec – < 17f67414718e6aba123335a33b7d15aa594fff34
- affected 89a6079df791aeace2044ea93be1b397195824ec – < afca9e19cc720bfafc75dc5ce429c185ca93f31d
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.158 – ≤ 5.10.*
- unaffected 5.15.82 – ≤ 5.15.*
- unaffected 6.0.12 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/10ed7655a17f6a3eaecd1293830488259ccd5723 (opens in a new tab)
- https://git.kernel.org/stable/c/b6eea8b2e858a20ad58ac62dc2de90fea2413f94 (opens in a new tab)
- https://git.kernel.org/stable/c/17f67414718e6aba123335a33b7d15aa594fff34 (opens in a new tab)
- https://git.kernel.org/stable/c/afca9e19cc720bfafc75dc5ce429c185ca93f31d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-53884 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-49000)Record last updated .