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CVE-2022-50576— serial: pch: Fix PCI device refcount leak in pch_request_dma()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确释放PCI设备引用计数，可能导致内存泄漏。

AI Predicted 3.3 Difficulty: Moderate EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 3c6a483275f47a2ef7119309ad3d791c10cf30da< 90ff030ca10b69feeebda1427550ebf9ed2ad868 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< dfd15c5550b9190d5b0f9bcacb3e6436322f3854 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< d165388227aa7e46a9751b90bae6337b5335cdbb affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 4f5d28865c665c9064de631a518f9bc8099d9ce4 affected
3c6a483275f47a2ef7119309ad3d791c10cf30da< 516614a371c26e3334625b4bca19a5362bf658d6 affected
… +12 more rows
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I. Basic Information for CVE-2022-50576

Vulnerability Information
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Vulnerability Title
serial: pch: Fix PCI device refcount leak in pch_request_dma()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确释放PCI设备引用计数，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 3c6a483275f47a2ef7119309ad3d791c10cf30da ~ 90ff030ca10b69feeebda1427550ebf9ed2ad868 -
Linux Linux 2.6.38 -

II. Public POCs for CVE-2022-50576

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III. Intelligence Information for CVE-2022-50576

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Patches & Fixes for CVE-2022-50576 (9)

Same Patch Batch · Linux · 2025-10-22 · 67 CVEs total

CVE-2023-53711 8.2 HIGH NFS: Fix a potential data corruption
CVE-2023-53705 8.2 HIGH ipv6: Fix out-of-bounds access in ipv6_find_tlv()
CVE-2023-53698 7.8 HIGH xsk: fix refcount underflow in error path
CVE-2023-53692 7.8 HIGH ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
CVE-2022-50569 7.8 HIGH xfrm: Update ipcomp_scratches with NULL when freed
CVE-2022-50570 7.8 HIGH platform/chrome: fix memory corruption in ioctl
CVE-2022-50567 7.8 HIGH fs: jfs: fix shift-out-of-bounds in dbAllocAG
CVE-2023-53718 7.8 HIGH ring-buffer: Do not swap cpu_buffer during resize process
CVE-2023-53695 7.8 HIGH udf: Detect system inodes linked into directory hierarchy
CVE-2023-53707 7.8 HIGH drm/amdgpu: Fix integer overflow in amdgpu_cs_pass1
CVE-2022-50581 7.8 HIGH hfs: fix OOB Read in __hfs_brec_find
CVE-2023-53729 7.8 HIGH soc: qcom: qmi_encdec: Restrict string length in decode
CVE-2023-53713 7.8 HIGH arm64: sme: Use STR P to clear FFR context field in streaming SVE mode
CVE-2023-53726 7.1 HIGH arm64: csum: Fix OoB access in IP checksum code for negative lengths
CVE-2023-53704 clk: imx: clk-imx8mp: improve error handling in imx8mp_clocks_probe()
CVE-2023-53706 mm/vmemmap/devdax: fix kernel crash when probing devdax devices
CVE-2023-53710 wifi: mt76: mt7921: fix error code of return in mt7921_acpi_read
CVE-2023-53708 ACPI: x86: s2idle: Catch multiple ACPI_TYPE_PACKAGE objects
CVE-2023-53712 ARM: 9317/1: kexec: Make smp stop calls asynchronous
CVE-2023-53714 drm/stm: ltdc: fix late dereference check

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50576

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