Security readout for executives and security teams
Plain-English summary
CVE-2022-49217 is a Linux kernel bug in the pm8001/pm80xx SCSI storage driver. A missing initialization can cause invalid DMA unmap operations and kernel crashes. Business impact is primarily availability risk on systems using the affected driver and kernel versions. No active exploitation is reported in the provided sources.
Executive priority
Treat as a targeted availability issue for Linux storage infrastructure, not a broad internet-facing emergency. Prioritize patching where affected drivers support critical storage workloads. If the driver is not present, business urgency is lower.
Technical view
In pm80xx_send_abort_all(), and related paths, the ccb n_elem field was not always initialized to zero. Completion handling could interpret stale nonzero data and call dma_unmap_sg() incorrectly in pm8001_ccb_task_free(), causing a crash. The kernel fix initializes n_elem in pm8001_send_abort_all(), pm8001_send_read_log(), and pm80xx_send_abort_all().
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the pm8001/pm80xx SCSI storage driver in use. The CVE record lists affected Linux versions including 3.10, 4.9.311, 4.14.276, 4.19.238, 5.4.189, 5.10.110, 5.15.33, 5.16.19, 5.17.2, and 5.18.
Exploitation context
The sources describe a crash condition during task abort/read-log driver paths, not a remote attack chain. KEV is false, and no cited source reports active exploitation or public weaponization. Practical risk depends on whether the affected storage driver is present and exercised on production systems.
Researcher notes
The CVE record lacks CVSS and CWE data. The source bundle provides kernel commit references and a crash trace, but not exploitability analysis. Assessment should focus on code presence, driver usage, and distribution backports rather than version strings alone.
Mitigation direction
- Apply Linux kernel updates that include the referenced stable fixes.
- Prioritize storage servers using the pm8001 or pm80xx driver.
- Check your Linux distributor’s advisory for packaged fixed kernel versions.
- Plan maintenance windows because remediation may require a kernel reboot.
Validation and detection
- Inventory Linux hosts and identify those using the pm8001/pm80xx driver.
- Compare running kernel builds against vendor advisories and referenced stable commits.
- Review kernel logs for pm80xx, pm8001, dma_unmap_sg, or IOMMU crash traces.
- Confirm updated kernels include initialization of ccb n_elem in the affected functions.
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-2022-49217 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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/9914461db82caee6c519acfbe10a86fe11bcdecaCVE reference, Linux
- https://git.kernel.org/stable/c/d6ec4471550cc53e96485a7124c5891e6a38d1c3CVE reference, Linux
- https://git.kernel.org/stable/c/1824a21b2cedc5774a5adfa74f5f7b90472d8677CVE reference, Linux
- https://git.kernel.org/stable/c/765674e3b30121782a2b792684554baa48c61f5eCVE reference, Linux
- https://git.kernel.org/stable/c/279f318bd7d6e04e6e0bc7b8cd8e190da8fa37a4CVE reference, Linux
- https://git.kernel.org/stable/c/c8db786858d895ac58342f67767b4999ae6538faCVE reference, Linux
- https://git.kernel.org/stable/c/326d894adf89f3c707b7784becbe241830daaab6CVE reference, Linux
- https://git.kernel.org/stable/c/16cd02e0951b520bef324adb9a35afcc92501cafCVE reference, Linux
- https://git.kernel.org/stable/c/7f12845c8389855dbcc67baa068b6832dc4a396eCVE 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.