Security readout for executives and security teams
Plain-English summary
CVE-2022-48728 is a Linux kernel crash bug in the hfi1 InfiniBand/RDMA driver. If early setup of accelerated IP over InfiniBand fails, cleanup can dereference a NULL pointer and panic the kernel. Business risk is mainly availability loss on specialized systems using this hardware and driver.
Executive priority
Prioritize remediation for HPC, storage, or low-latency infrastructure using hfi1/RDMA hardware. For general Linux fleets without this driver or hardware, urgency is lower, but kernel update tracking should still include the fix.
Technical view
The issue is in IB/hfi1 AIP early initialization. An error path from hfi1_ipoib_setup_rn() can call hfi1_ipoib_netdev_dtor(), reaching hfi1_ipoib_txreq_deinit() with invalid state and triggering a NULL dereference. The fix adjusts self-unwinding error paths and moves accelerated entry switching to the success path.
Likely exposure
Exposure appears limited to Linux systems with the hfi1 driver and IP over InfiniBand/RDMA functionality, especially hosts using Intel Omni-Path/HFI hardware. The bundle lists affected Linux kernel version metadata and stable fixes, but exact vendor distribution exposure requires checking distro backports.
Exploitation context
The provided sources describe a kernel panic during driver initialization error handling. They do not show public exploitation, remote attack details, exploit code, or KEV listing. Treat this as an availability risk unless vendor advisories identify a broader attack path.
Researcher notes
Evidence is limited to the CVE record and Linux stable commit references. No CVSS, CWE, or KEV status is supplied. The root cause is cleanup after partial initialization, not a documented privilege escalation or remote code execution path.
Mitigation direction
- Update to a kernel containing one of the referenced stable fixes.
- Check Linux distribution advisories for backported hfi1 fixes.
- Prioritize systems using hfi1, RDMA, InfiniBand, or Omni-Path hardware.
- Disable unused hfi1/IPOIB functionality where operationally acceptable.
- Monitor vendor kernel packages before applying production updates.
Validation and detection
- Inventory kernels and loaded hfi1, ib_core, ib_ipoib modules.
- Identify hosts with InfiniBand, RDMA, or Omni-Path adapters.
- Compare installed kernel builds against vendor advisories and fixed stable commits.
- Review boot and kernel logs for hfi1 initialization panics.
- Confirm update status in staging before production rollout.
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-2022-48728 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/4a9bd1e6780fc59f81466ec3489d5ad535a37190CVE reference, Linux
- https://git.kernel.org/stable/c/a3dd4d2682f2a796121609e5f3bbeb1243198c53CVE reference, Linux
- https://git.kernel.org/stable/c/1899c3cad265c4583658aed5293d02e8af84276bCVE reference, Linux
- https://git.kernel.org/stable/c/5f8f55b92edd621f056bdf09e572092849fabd83CVE 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.