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CVE-2020-36784

18
FAUCET Score

CVE-2020-36784 is a reference leak vulnerability in the Linux kernel's I2C Cadence driver, specifically affecting the cdns_i2c_master_xfer and cdns_reg_slave functions. It occurs when pm_runtime_get_sync fails, leading to an unbalanced PM usage counter. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring low privileges, and potentially leading to high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.5, < 5.10.37CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.11, < 5.11.21CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.12, < 5.12.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
13.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 59th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2020-36784Low

kernel: i2c: cadence: fix reference leak when pm_runtime_get_sync fails

Feb 28, 2024

References

git.kernel.org / stable/c/23ceb8462dc6f4b4decdb5536a7e5fc477cdf0b6
Patch
git.kernel.org / stable/c/30410519328c94367e561fd878e5f0d3a0303585
Patch
git.kernel.org / stable/c/a45fc41beed8e0fe31864619c34aa00797fb60c1
Patch
git.kernel.org / stable/c/d57ff04e0ed6f3be1682ae861ead33f879225e07
Patch