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

Deferred
AliasesUBUNTU-CVE-2022-50576DEBIAN-CVE-2022-50576
Published 22-10-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-50576 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.2% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
SUSE-SU-2025:4111-1SUSE-SU-2025:4139-1SUSE-SU-2025:4149-1SUSE-SU-2025:4320-1

Timeline

  1. 22-10-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu119 products
  • linuxAll versions (No fix recorded) | < 4.15.0-208.220 | < 5.4.0-144.161 | < 5.15.0-69.76
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1153.166 | < 5.4.0-1097.105 | < 5.15.0-1033.37
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.4-1
Linux1 product
  • linux≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 90ff030ca10b69feeebda1427550ebf9ed2ad868 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 56e5a7c5ee3f0dc8978b5df2b1a98a1b060c5e2a | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < dfd15c5550b9190d5b0f9bcacb3e6436322f3854 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < d165388227aa7e46a9751b90bae6337b5335cdbb | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 07f4ca68b0f6bf84b6b391c14b59fd179fcde9c5 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 6f7d82380fbeaed3a940efc33c23f0c4bbd0fc02 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 4f5d28865c665c9064de631a518f9bc8099d9ce4 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 516614a371c26e3334625b4bca19a5362bf658d6 | ≥ 3c6a483275f47a2ef7119309ad3d791c10cf30da, < 8be3a7bf773700534a6e8f87f6ed2ed111254be5 | 2.6.38

3 vendors · 121 products

References

13 links
Show all 13 references