CVE-2022-49002
iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init() 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() for the error path to avoid reference count leak.
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)
- 0.25% · top 84% of all CVEs (6 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 2e45528930388658603ea24d49cf52867b928d3e – < d47bc9d7bcdbb9adc9703513d964b514fee5b0bf
- affected 2e45528930388658603ea24d49cf52867b928d3e – < 71c4a621985fc051ab86d3a86c749069a993fcb2
- affected 2e45528930388658603ea24d49cf52867b928d3e – < 876d7bfb89273997056220029ff12b1c2cc4691d
- affected 2e45528930388658603ea24d49cf52867b928d3e – < cbdd83bd2fd67142b03ce9dbdd1eab322ff7321f
- affected 2e45528930388658603ea24d49cf52867b928d3e – < a5c65cd56aed027f8a97fda8b691caaeb66d115e
- affected 2e45528930388658603ea24d49cf52867b928d3e – < bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7
- affected 2e45528930388658603ea24d49cf52867b928d3e – < 2a8f7b90681472948de172dbbf5a54cd342870aa
- affected 2e45528930388658603ea24d49cf52867b928d3e – < 4bedbbd782ebbe7287231fea862c158d4f08a9e3
- affected 3.15
- unaffected < 3.15
- unaffected 4.9.335 – ≤ 4.9.*
- unaffected 4.14.301 – ≤ 4.14.*
- unaffected 4.19.268 – ≤ 4.19.*
- unaffected 5.4.226 – ≤ 5.4.*
- unaffected 5.10.158 – ≤ 5.10.*
- unaffected 5.15.82 – ≤ 5.15.*
- unaffected 6.0.12 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (8)
- https://git.kernel.org/stable/c/d47bc9d7bcdbb9adc9703513d964b514fee5b0bf (opens in a new tab)
- https://git.kernel.org/stable/c/71c4a621985fc051ab86d3a86c749069a993fcb2 (opens in a new tab)
- https://git.kernel.org/stable/c/876d7bfb89273997056220029ff12b1c2cc4691d (opens in a new tab)
- https://git.kernel.org/stable/c/cbdd83bd2fd67142b03ce9dbdd1eab322ff7321f (opens in a new tab)
- https://git.kernel.org/stable/c/a5c65cd56aed027f8a97fda8b691caaeb66d115e (opens in a new tab)
- https://git.kernel.org/stable/c/bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7 (opens in a new tab)
- https://git.kernel.org/stable/c/2a8f7b90681472948de172dbbf5a54cd342870aa (opens in a new tab)
- https://git.kernel.org/stable/c/4bedbbd782ebbe7287231fea862c158d4f08a9e3 (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)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-49002)Record last updated .