Security readout for executives and security teams
Plain-English summary
CVE-2022-48918 is a Linux kernel iwlwifi driver bug. If the system boots with debugfs disabled, the Intel Wi-Fi MVM module can dereference an invalid pointer and hit a kernel BUG. Business impact is mainly availability: affected systems may crash or fail during driver/module initialization.
Executive priority
Treat as a targeted reliability issue, not an internet-wide emergency. Prioritize Linux laptop and workstation fleets using Intel Wi-Fi, especially hardened builds disabling debugfs. Remediate through normal kernel update processes unless crashes are observed.
Technical view
The iwlwifi mvm code used debugfs_dir without checking for an error when debugfs=off is set on the kernel command line. The fix adds pointer/error checks before use. Public sources list Linux kernel as affected around 5.12 and fixed in stable commits referenced for 5.15.27, 5.16.13, and 5.17.
Likely exposure
Exposure is most likely on Linux endpoints or laptops using Intel iwlwifi/iwlmvm wireless drivers, especially where debugfs=off is configured. Servers without this driver or hardware are less likely exposed. Distribution backports may change version-based conclusions.
Exploitation context
No source provided indicates active exploitation, and the CVE is not listed as KEV. The documented trigger is a local boot/module-load condition involving debugfs=off, causing a NULL pointer dereference/BUG rather than a described privilege escalation or remote attack.
Researcher notes
The source evidence describes a NULL pointer dereference in iwl_mvm_dbgfs_register during module initialization. CVSS and CWE are not provided. Affected-version data is limited and should be reconciled with distro kernels, since vendors often backport fixes without changing major kernel versions.
Mitigation direction
- Update to a vendor kernel containing the referenced stable iwlwifi fixes.
- Check Linux distribution advisories for backported fixes to supported kernels.
- If operationally acceptable, review use of debugfs=off on affected wireless systems.
- Prioritize systems where Wi-Fi availability is business-critical.
Validation and detection
- Identify systems loading iwlwifi and iwlmvm modules.
- Check kernel version and distribution patch level against vendor advisories.
- Review boot parameters for debugfs=off.
- Confirm whether referenced stable commits or distro backports are present.
- Monitor affected systems for kernel BUG/Oops traces in iwl_mvm_dbgfs_register.
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
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CVE-2022-48918 mapping review
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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/7de1ed755e1ace30d97a724bad32452ed86b653bCVE reference, Linux
- https://git.kernel.org/stable/c/fe51975ff13831e794e1bcd0039b305dcad3d7baCVE reference, Linux
- https://git.kernel.org/stable/c/5a6248c0a22352f09ea041665d3bd3e18f6f872cCVE reference, Linux
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.