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CVE-2023-53527

20
FAUCET Score

CVE-2023-53527 is a memory leak vulnerability in the Linux kernel's Thunderbolt driver, specifically within the tb_handle_dp_bandwidth_request() function. This medium-severity flaw (CVSS 5.5) allows a local attacker with low privileges to cause a denial of service (availability impact) due to unreleased memory. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.3, < 6.4.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*

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
0.12%
Probability of exploitation in next 30 days
EPSS Percentile
2.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0012 is in the 13th 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

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-427.13.1.el9_4
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2023-53527Low

kernel: thunderbolt: Fix memory leak in tb_handle_dp_bandwidth_request()

Oct 1, 2025

References

git.kernel.org / stable/c/0752bb32aed2c5dd85821195a507a1079c4835f7
Patch
git.kernel.org / stable/c/596a5123cc782d458b057eb3837e66535cd0befa
Patch