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CVE Record

CVE-2023-53508: ublk: fail to start device if queue setup is interrupted

In the Linux kernel, the following vulnerability has been resolved: ublk: fail to start device if queue setup is interrupted In ublk_ctrl_start_dev(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_START_DEV, otherwise kernel oops can be triggered. Reported by German when working on qemu-storage-deamon which requires single thread ublk daemon.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2023-53508 is a Linux kernel ublk bug where an interrupted device-start operation can leave queues unfinished and later trigger a kernel oops. That can affect host stability, especially where ublk-backed storage is used. The source bundle provides no CVSS score, CWE, or evidence of active exploitation.

Executive priority

Treat as a targeted infrastructure stability issue, not an internet-wide emergency based on supplied evidence. Prioritize patching on Linux hosts using ublk or qemu-storage-daemon-backed storage, then fold remaining systems into normal kernel maintenance.

Technical view

In ublk_ctrl_start_dev(), wait_for_completion_interruptible() can return after a signal before queue setup succeeds. The resolved behavior fails UBLK_CMD_START_DEV instead of allowing a partially initialized device path that may oops. The report cites qemu-storage-daemon work needing a single-thread ublk daemon.

Likely exposure

Exposure appears limited to Linux systems running affected kernels with ublk functionality in use or reachable by local storage-management workflows. The bundle lists Linux kernel versions and stable commits but does not provide distro package status, configuration prerequisites, or privilege requirements.

Exploitation context

No active exploitation is cited, and KEV is false. The available description supports a stability impact through a kernel oops after interrupted ublk queue setup, not remote code execution or data theft. Practical exploitability is unclear from the supplied sources.

Researcher notes

The key condition is interrupted ublk queue setup during UBLK_CMD_START_DEV. Source data lacks CVSS, CWE, privilege details, and distribution mappings. Avoid over-scoping beyond affected Linux kernel ublk code paths until vendor advisories or kernel version metadata clarify exposure.

Mitigation direction

  • Update to a vendor kernel containing the linked stable ublk fixes.
  • Check Linux distribution advisories for backported package versions.
  • Identify hosts running ublk-backed storage or qemu-storage-daemon workflows.
  • If ublk is unnecessary, disable or avoid that workload per vendor guidance.

Validation and detection

  • Inventory running kernel versions on systems using ublk storage paths.
  • Confirm vendor kernel packages include the referenced stable commits.
  • Review kernel logs for ublk-related oops events during device start.
  • Test affected storage workflows after patching for normal device startup.
Prepared
Confidence
medium
Sources
5

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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ATT&CK lookup starting points

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CVE-2023-53508 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
0ADP providers
4Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux71f28f3136aff5890cd56de78abc673f8393cad9, 71f28f3136aff5890cd56de78abc673f8393cad9, 71f28f3136aff5890cd56de78abc673f8393cad9unaffected
LinuxLinux6.0, 0, 6.1.43, 6.4.8, 6.5affected
Weakness

CWE details

No CWE listed

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