Security readout for executives and security teams
Plain-English summary
CVE-2024-43911 is a Linux kernel Wi-Fi crash bug. In some multi-link wireless connection handling, the kernel can read a missing channel pointer and crash. The public record describes a resolved kernel NULL dereference, but does not provide CVSS scoring or evidence of active exploitation.
Executive priority
Handle through normal kernel patch management unless Wi-Fi-heavy fleets, unstable clients, or security appliances use affected kernels. Lack of CVSS and exploitation evidence lowers emergency urgency, but kernel crashes can still disrupt endpoints and operations.
Technical view
The flaw is in Linux mac80211 during ieee80211_start_tx_ba_session. For MLD connections, link_data/link_conf are dynamically allocated and do not populate vif->bss_conf chanreq, allowing chan to be NULL. The fix changes capability checks to use the station default link instead of the missing channel path.
Likely exposure
Exposure is likely limited to Linux systems using affected kernel builds with mac80211 Wi-Fi paths and MLD-related operation. The source data names Linux kernel versions around 6.9 with fixes referenced by stable commits and distribution advisories. Systems without affected Wi-Fi functionality are less likely exposed.
Exploitation context
The bundle shows a kernel crash log and says the vulnerability has been resolved. It does not show CISA KEV listing, public exploitation, remote attack prerequisites, or a working exploit. Treat exploitation status as not confirmed from these sources.
Researcher notes
The record is sparse: no CWE, CVSS, exploitability details, or clear attacker model are provided. The strongest evidence is the kernel commit description and crash trace. Validation should focus on affected kernel lineage, mac80211 use, and whether vendor kernels have incorporated the fixes.
Mitigation direction
- Apply Linux kernel updates from your distribution or vendor guidance.
- Prioritize laptops, workstations, and appliances using Wi-Fi on affected kernel branches.
- Review the linked stable kernel commits for fixed downstream versions.
- Check Debian or other vendor advisories for backported package fixes.
Validation and detection
- Inventory Linux kernel versions on Wi-Fi-capable systems.
- Check whether systems use mac80211-based wireless drivers and MLD-related functionality.
- Confirm installed kernels include the referenced stable fixes or vendor backports.
- Review crash telemetry for ieee80211_start_tx_ba_session NULL dereferences.
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.
CVE-2024-43911 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/a5594c1e03b0df3908b1e1202a1ba34422eed0f6CVE reference, Linux
- https://git.kernel.org/stable/c/021d53a3d87eeb9dbba524ac515651242a2a7e3bCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/01/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.