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CVE-2022-50576 (GCVE-0-2022-50576)

Vulnerability from cvelistv5 – Published: 2025-10-22 13:23 – Updated: 2026-05-11 19:22
VLAI
Title
serial: pch: Fix PCI device refcount leak in pch_request_dma()
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: pch: Fix PCI device refcount leak in pch_request_dma() As comment of pci_get_slot() says, it returns a pci_device with its refcount increased. The caller must decrement the reference count by calling pci_dev_put(). Since 'dma_dev' is only used to filter the channel in filter(), we can call pci_dev_put() before exiting from pch_request_dma(). Add the missing pci_dev_put() for the normal and error path.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 90ff030ca10b69feeebda1427550ebf9ed2ad868 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < dfd15c5550b9190d5b0f9bcacb3e6436322f3854 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < d165388227aa7e46a9751b90bae6337b5335cdbb (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 4f5d28865c665c9064de631a518f9bc8099d9ce4 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 516614a371c26e3334625b4bca19a5362bf658d6 (git)
Affected: 3c6a483275f47a2ef7119309ad3d791c10cf30da , < 8be3a7bf773700534a6e8f87f6ed2ed111254be5 (git)
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Linux Linux Affected: 2.6.38
Unaffected: 0 , < 2.6.38 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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              "status": "unaffected",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: pch: Fix PCI device refcount leak in pch_request_dma()\n\nAs comment of pci_get_slot() says, it returns a pci_device with its\nrefcount increased. The caller must decrement the reference count by\ncalling pci_dev_put().\n\nSince \u0027dma_dev\u0027 is only used to filter the channel in filter(), we can\ncall pci_dev_put() before exiting from pch_request_dma(). Add the\nmissing pci_dev_put() for the normal and error path."
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    "dateReserved": "2025-10-22T13:20:23.761Z",
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Add the\\nmissing pci_dev_put() for the normal and error path.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/tty/serial/pch_uart.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"90ff030ca10b69feeebda1427550ebf9ed2ad868\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"dfd15c5550b9190d5b0f9bcacb3e6436322f3854\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"d165388227aa7e46a9751b90bae6337b5335cdbb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"4f5d28865c665c9064de631a518f9bc8099d9ce4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"516614a371c26e3334625b4bca19a5362bf658d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3c6a483275f47a2ef7119309ad3d791c10cf30da\",\"lessThan\":\"8be3a7bf773700534a6e8f87f6ed2ed111254be5\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/tty/serial/pch_uart.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.38\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.38\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f5d28865c665c9064de631a518f9bc8099d9ce4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/516614a371c26e3334625b4bca19a5362bf658d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8be3a7bf773700534a6e8f87f6ed2ed111254be5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/90ff030ca10b69feeebda1427550ebf9ed2ad868\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d165388227aa7e46a9751b90bae6337b5335cdbb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfd15c5550b9190d5b0f9bcacb3e6436322f3854\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:31:44+00:00",
      "cve": "CVE-2022-50576",
      "id": "CVE-2022-50576",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: serial: pch: Fix PCI device refcount leak in pch_request_dma()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50576.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.