Security readout for executives and security teams
Plain-English summary
CVE-2023-3863 is a Linux kernel NFC bug. A highly privileged local user could trigger a use-after-free condition that sources describe as a kernel information leak risk. The business urgency is moderate because exploitation requires local access, high privileges, and high complexity, and no KEV listing is provided.
Executive priority
Treat this as a routine but real kernel maintenance issue. Prioritize confirmation for internet-facing infrastructure only if local privileged users or managed appliances are relevant. Otherwise, fold remediation into normal kernel patch cycles with vendor validation.
Technical view
The flaw is a CWE-416 use-after-free in nfc_llcp_find_local within net/nfc/llcp_core.c. The provided CVSS 3.1 vector is AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H, score 6.4. The bundle identifies Linux Kernel 6.5-rc1 and includes an upstream commit reference.
Likely exposure
Likely exposure is limited to systems running affected Linux kernel builds with the NFC LLCP code path present. The bundle lists Kernel 6.5-rc1 and marks Red Hat Enterprise Linux 6-9 and Fedora kernel packages as unaffected.
Exploitation context
No active exploitation is stated in the provided sources, and KEV is false. Any practical risk appears constrained by the need for local access, high privileges, and high attack complexity. Evidence is incomplete for non-listed distributions or appliances beyond the cited advisories.
Researcher notes
Focus analysis on the Linux NFC LLCP path and the upstream commit reference. The source bundle does not provide exploit details, proof of exploitation, or complete downstream version mapping. Avoid assuming exploitability outside affected kernel builds confirmed by vendor advisories.
Mitigation direction
- Check your OS or appliance vendor advisory for applicability.
- Apply vendor kernel updates where CVE-2023-3863 is listed as fixed.
- Confirm whether your kernel includes the referenced upstream commit or a backport.
- Restrict local privileged access on systems where affected kernels remain in use.
- Track Debian and NetApp advisories if those environments are in scope.
Validation and detection
- Inventory Linux kernel versions across servers, workstations, and appliances.
- Compare results against vendor CVE status, not only upstream version numbers.
- Confirm Red Hat and Fedora systems match the unaffected package status in sources.
- Check whether NFC functionality and related kernel modules are present.
- Document any affected systems lacking a vendor-confirmed fix.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-3863 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H0.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2023-3863CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2225126CVE reference · issue-tracking, x_refsource_REDHAT
- https://github.com/torvalds/linux/commit/6709d4b7bc2e079241fdef15d1160581c5261c10CVE reference
- https://www.debian.org/security/2023/dsa-5480CVE reference
- https://www.debian.org/security/2023/dsa-5492CVE reference
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlCVE reference
- https://security.netapp.com/advisory/ntap-20240202-0002/CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.