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CVE Record

CVE-2022-48789: nvme-tcp: fix possible use-after-free in transport error_recovery work

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix possible use-after-free in transport error_recovery work While nvme_tcp_submit_async_event_work is checking the ctrl and queue state before preparing the AER command and scheduling io_work, in order to fully prevent a race where this check is not reliable the error recovery work must flush async_event_work before continuing to destroy the admin queue after setting the ctrl state to RESETTING such that there is no race .submit_async_event and the error recovery handler itself changing the ctrl state.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A race in Linux NVMe-over-TCP error recovery can let asynchronous work access an admin queue after it is being destroyed. This use-after-free may cause memory corruption or system failure. Risk is concentrated in systems using the Linux NVMe/TCP transport.

Executive priority

Treat affected NVMe/TCP storage hosts as urgent because kernel memory-safety failures can disrupt critical storage services. Prioritize confirmation and patching, especially where NVMe/TCP crosses less-trusted networks. Systems not using NVMe/TCP should receive lower priority after validation.

Technical view

The error-recovery worker changed the controller state and destroyed the admin queue without first flushing pending async-event work. A concurrent asynchronous-event submission could therefore use freed queue memory. The stable fixes flush async_event_work before queue teardown, closing the race.

Likely exposure

Potential exposure is limited to Linux systems using NVMe over TCP. The bundle associates affected status with kernel lines from 5.0 through 5.17 and lists several stable versions, but its version data is ambiguous. Distribution backports must be checked individually.

Exploitation context

The supplied CVSS is 9.8 and models unauthenticated network attack potential with high impact. However, the source bundle provides no proof of practical exploitation, public weaponization, or active exploitation, and the CVE is not marked as CISA KEV.

Researcher notes

The vulnerable condition is a teardown race between async-event submission and transport error recovery. Source material identifies the ordering fix but does not establish exploitability beyond the CVSS assessment. The flattened affected-version list contains unclear entries, including “0,” so upstream commits and distribution advisories are stronger validation anchors.

Mitigation direction

  • Update to a vendor-supported kernel containing the applicable nvme-tcp stable fix.
  • Confirm the selected distribution package includes the relevant upstream backport.
  • If updating is delayed, assess whether NVMe/TCP can be safely disabled or isolated.
  • Monitor Linux and distribution advisories for corrected version guidance.

Validation and detection

  • Inventory systems loading or using the Linux nvme-tcp transport.
  • Record running kernel and distribution package versions on exposed systems.
  • Compare vendor backport records against the referenced stable kernel commits.
  • After updating, confirm the corrected kernel is running following any required reboot.
Prepared
Confidence
high
Sources
7

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

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.

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CVE-2022-48789 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
3Timeline events
2ADP providers
6Source links

SSVC decision data

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

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2022-48789Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
LinuxLinux3f2304f8c6d6ed97849057bd16fee99e434ca796, 3f2304f8c6d6ed97849057bd16fee99e434ca796, 3f2304f8c6d6ed97849057bd16fee99e434ca796, 3f2304f8c6d6ed97849057bd16fee99e434ca796, 3f2304f8c6d6ed97849057bd16fee99e434ca796unaffected
LinuxLinux5.0, 0, 5.4.181, 5.10.102, 5.15.25, 5.16.11, 5.17affected
Weakness

CWE details

No CWE listed

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