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CVE-2024-21803

22
FAUCET Score

CVE-2024-21803 is a high-severity Use-After-Free vulnerability in the Linux kernel's Bluetooth modules, affecting versions from 2.6.12-rc2 up to, but not including, 6.8-rc1. This flaw allows a local attacker to execute arbitrary code, potentially leading to full system compromise. With a CVSS score of 7.8, it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= v2.6.12-rc2, < v6.8-rc1CPE match
cpe:2.3:a:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 2.6.12.1, <= 6.6.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
2.6.12CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
2.6.12CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
2.6.12CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.5LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
1.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 80th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

microsoftpatch availablevia msrc
Product: 17325-16823Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 17095-17086Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 19673-17086Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: 17065-17084Fixed in: 6.6.35.1-4
microsoftpatch availablevia msrc
Product: 19529-17084Fixed in: 6.6.35.1-4
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.158.1-1 on CBL Mariner 2.0Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.180.1-1 on CBL Mariner 2.0Fixed in: 5.15.158.1-1
microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.35.1-4 on Azure Linux 3.0Fixed in: 6.6.35.1-4
microsoftpatch availablevia msrc
Product: azl3 kernel 6.6.92.2-1 on Azure Linux 3.0Fixed in: 6.6.35.1-4

Vendor Advisories (2)

redhatCVE-2024-21803Moderate

kernel: bluetooth: use-after-free vulnerability in af_bluetooth.c

Jan 30, 2024
microsoft2024-Jan/CVE-2024-21803Important

Possible UAF in bt_accept_poll in Linux kernel

Jan 9, 2024

References

bugzilla.openanolis.cn / show_bug.cgi
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