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CVE-2024-56591

17
FAUCET Score

CVE-2024-56591 is a vulnerability in the Linux kernel's Bluetooth (hci_conn) component, specifically related to the handling of delayed work. It affects the Linux kernel and has been patched by replacing cancel_delayed_work_sync with disable_delayed_work_sync to prevent new work submissions when an object is being freed. With a CVSS score of 5.5 (Medium), this vulnerability could lead to a high impact on availability for local attackers with low privileges, requiring no user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.12.5CPE 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
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
8.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 44th 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-0:5.14.0-570.12.1.el9_6
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (2)

redhatCVE-2024-56591Moderate

kernel: Bluetooth: hci_conn: Use disable_delayed_work_sync

Dec 27, 2024
microsoft2024-Dec/CVE-2024-56591

Bluetooth: hci_conn: Use disable_delayed_work_sync

Dec 10, 2024

References

git.kernel.org / stable/c/2b0f2fc9ed62e73c95df1fa8ed2ba3dac54699df
Patch
git.kernel.org / stable/c/c55a4c5a04bae40dcdc1e1c19d8eb79a06fb3397
Patch