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CVE Record

CVE-2022-48791: scsi: pm8001: Fix use-after-free for aborted TMF sas_task

In the Linux kernel, the following vulnerability has been resolved: scsi: pm8001: Fix use-after-free for aborted TMF sas_task Currently a use-after-free may occur if a TMF sas_task is aborted before we handle the IO completion in mpi_ssp_completion(). The abort occurs due to timeout. When the timeout occurs, the SAS_TASK_STATE_ABORTED flag is set and the sas_task is freed in pm8001_exec_internal_tmf_task(). However, if the I/O completion occurs later, the I/O completion still thinks that the sas_task is available. Fix this by clearing the ccb->task if the TMF times out - the I/O completion handler does nothing if this pointer is cleared.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-48791 is a Linux kernel storage-driver bug. In a timeout path, the kernel can free a SAS task, then later handle completion as if that task still exists. The source describes a use-after-free in the pm8001 SCSI/SAS driver. Public data here does not provide CVSS, confirmed exploitation, or business-impact detail.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency based on current evidence. Prioritize storage-heavy Linux servers where pm8001 hardware or the driver is present. Escalate if your vendor rates it higher or confirms exposure in supported kernels.

Technical view

The issue is in the Linux kernel pm8001 driver. If an internal TMF sas_task times out, SAS_TASK_STATE_ABORTED is set and the task is freed. A later mpi_ssp_completion() path may still reference ccb->task. The fix clears ccb->task on TMF timeout so the completion handler does not process a freed task pointer.

Likely exposure

Likely exposure is Linux systems using the pm8001 SCSI/SAS storage controller driver on affected kernel builds. The bundle lists Linux as affected for kernel/version ranges including 5.14, 5.10.102, 5.15.25, 5.16.11, and 5.17, but exact distribution backport status must be validated locally.

Exploitation context

The bundle does not show CISA KEV listing, public exploitation, exploit code, or a CVSS score. The condition involves TMF timeout and delayed I/O completion in a kernel storage driver, so practical impact depends on hardware, driver use, kernel build, and reachable storage workloads.

Researcher notes

Evidence is limited to the CVE text and upstream stable references. The root cause is a stale ccb->task pointer after TMF timeout. Do not assume broad exposure across all Linux systems; confirm pm8001 driver use, kernel lineage, and whether fixes are backported by the distribution.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes or distribution backports.
  • Prioritize hosts using pm8001-supported SAS/SCSI storage hardware.
  • Check vendor kernel advisories before relying only on upstream version numbers.
  • If immediate patching is impossible, monitor vendor guidance for supported mitigations.
  • Include this in normal kernel vulnerability management and maintenance windows.

Validation and detection

  • Inventory Linux kernel versions across server and storage-facing fleets.
  • Identify systems with the pm8001 driver present or loaded.
  • Map each kernel package to vendor advisories or the referenced stable commits.
  • Confirm patched systems no longer run affected builds.
  • Review crash logs for storage-driver instability, without treating absence as proof of safety.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2022-48791 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux968ee9176a4489ce6d5ee54ff88dadfbff9b95f4, d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1, d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1, d712d3fb484b7fa8d1d57e9ca6f134bb9d8c18b1, fa3c19ceaa8b4b7c29d710c2c407df57d256a6c5unaffected
LinuxLinux5.14, 0, 5.10.102, 5.15.25, 5.16.11, 5.17affected
Weakness

CWE details

No CWE listed

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