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NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
  • Fixed version: Linux Linux 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5, 4f5d28865c665c9064de631a518f9bc8099d9ce4, 516614a371c26e3334625b4bca19a5362bf658d6.

Low priority for now. Upgrade to Linux Linux 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5, 4f5d28865c665c9064de631a518f9bc8099d9ce4, 516614a371c26e3334625b4bca19a5362bf658d6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Oct 22, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • Not in KEV: no record of exploitation in the wild
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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.38affected
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 90ff030ca10b69feeebda1427550ebf9ed2ad868affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2aaffected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before dfd15c5550b9190d5b0f9bcacb3e6436322f3854affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before d165388227aa7e46a9751b90bae6337b5335cdbbaffected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 4f5d28865c665c9064de631a518f9bc8099d9ce4affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 516614a371c26e3334625b4bca19a5362bf658d6affected · git
    • 3c6a483275f47a2ef7119309ad3d791c10cf30da and later · before 8be3a7bf773700534a6e8f87f6ed2ed111254be5affected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-50574Oct 22, 2025 · drm/omap: dss: Fix refcount leak bugs
    0Monitor
  • ← EarlierCVE-2022-50575Oct 22, 2025 · xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource()
    0Monitor
  • Later →CVE-2022-50577Oct 22, 2025 · ima: Fix memory leak in __ima_inode_hash()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5Vendor (CNA)
Linux Linux4f5d28865c665c9064de631a518f9bc8099d9ce4Vendor (CNA)
Linux Linux516614a371c26e3334625b4bca19a5362bf658d6Vendor (CNA)
Linux Linux56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2aVendor (CNA)
Linux Linux6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02Vendor (CNA)
Linux Linux8be3a7bf773700534a6e8f87f6ed2ed111254be5Vendor (CNA)
Linux Linux90ff030ca10b69feeebda1427550ebf9ed2ad868Vendor (CNA)
Linux Linuxd165388227aa7e46a9751b90bae6337b5335cdbbVendor (CNA)
Linux Linuxdfd15c5550b9190d5b0f9bcacb3e6436322f3854Vendor (CNA)
debian:linux6.1.4-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records