Security readout for executives and security teams
Plain-English summary
This is a Linux kernel Wi-Fi flaw caused by an off-by-one validation error. A local user could trigger unsafe memory access in the nl80211/mac80211 path, with potential data exposure or system crash. Public sources show a fuzzer crash and kernel fixes, but no cited active exploitation.
Executive priority
Treat this as high priority for Linux fleets with Wi-Fi or untrusted local users. It is not remotely exploitable based on the provided sources, but kernel memory access and crash potential justify timely patching through normal emergency or accelerated maintenance windows.
Technical view
NL80211_ATTR_MLO_LINK_ID was validated with an inclusive maximum that allowed IEEE80211_MLD_MAX_NUM_LINKS instead of the last valid index. The demonstrated path reaches nl80211_tx_control_port and ieee80211_tx_control_port, producing a KASAN wild-memory-access read. CVSS is 7.1 with local, low-privilege attack requirements.
Likely exposure
Linux systems using affected kernel builds and the Wi-Fi nl80211/mac80211 stack are the main concern. Exposure is most relevant where untrusted local users, containers, or workloads can reach kernel networking interfaces. The provided version data should be verified against vendor kernel packages.
Exploitation context
The bundle reports KEV as false. The public description includes a syzkaller-style fuzzer crash, not evidence of real-world exploitation. Attack prerequisites are local access with low privileges and no user interaction, according to the CVSS vector.
Researcher notes
Evidence is limited to the CVE description, Linux stable commit references, and a Debian LTS advisory. The root issue is CWE-193 off-by-one range validation. Do not assume exploitability beyond the local CVSS vector and demonstrated crash without additional vendor or exploit evidence.
Mitigation direction
- Apply Linux kernel updates from your distribution or vendor.
- Review the referenced stable kernel commits for fixed backports.
- Track Debian LTS guidance if using affected Debian kernel packages.
- Prioritize endpoints and hosts with Wi-Fi enabled or local multi-user access.
- Disable unused Wi-Fi functionality where vendor guidance and operations allow.
Validation and detection
- Inventory Linux kernel versions across laptops, servers, and appliances.
- Compare installed kernel packages with vendor advisories and stable fixes.
- Confirm whether Wi-Fi drivers and nl80211/mac80211 functionality are present.
- Check vulnerability scanners for CVE-2024-56663 coverage and false positives.
- Verify patched systems have rebooted into the updated kernel.
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-193: 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-2024-56663 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
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.
SSVC decision data
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:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/29e640ae641b9f5ffc666049426d2b16c98d9963CVE reference, Linux
- https://git.kernel.org/stable/c/f3412522f78826fef1dfae40ef378a863df2591cCVE reference, Linux
- https://git.kernel.org/stable/c/f850d1d9f1106f528dfc5807565f2d1fa9a397d3CVE reference, Linux
- https://git.kernel.org/stable/c/2e3dbf938656986cce73ac4083500d0bcfbffe24CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlCVE reference, CVE
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.
Off-by-one Error
Off-by-one Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.