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CVE-2023-3863

16
FAUCET Score

CVE-2023-3863 is a use-after-free vulnerability in the Linux kernel's NFC subsystem, specifically affecting Debian and other Linux kernel versions. This flaw allows a local user with high privileges to trigger an information leak. Rated Medium (CVSS 4.1), exploitation requires high attack complexity and user privileges, with the primary impact being confidentiality. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.5
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
13.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 65th percentile among its peer group of 418 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 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 (10)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.122.1-2
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 5.10.188.1-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 5.10.188.1-1
microsoftpatch availablevia msrc
Product: 17824-16823Fixed in: 5.15.122.1-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.122.1-2
microsoftpatch availablevia msrc
Product: cm1 kernel 5.10.188.1-1 on CBL Mariner 1.0Fixed in: 5.10.188.1-1
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.122.1-2 on CBL Mariner 2.0Fixed in: 5.15.122.1-2
microsoftpatch availablevia msrc
Product: 17823-16820Fixed in: 5.10.188.1-1
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (3)

microsoft2023-Aug/CVE-2023-3863

CVE-2023-3863

Aug 8, 2023
microsoft2023-Jul/CVE-2023-3863Moderate

Use-after-free in nfc_llcp_find_loca in net/nfc/llcp_core.c

Jul 11, 2023
redhatCVE-2023-3863Moderate

kernel: use-after-free in nfc_llcp_find_loca in net/nfc/llcp_core.c

Jun 25, 2023

References

access.redhat.com / security/cve/CVE-2023-3863
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / torvalds/linux/commit/6709d4b7bc2e079241fdef15d1160581c5261c10
Patch
lists.debian.org / debian-lts-announce/2023/10/msg00027.html
Mailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20240202-0002
debian.org / security/2023/dsa-5480
Third Party Advisory
debian.org / security/2023/dsa-5492
Third Party Advisory