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CVE Record

CVE-2023-53633: accel/qaic: Fix a leak in map_user_pages()

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Fix a leak in map_user_pages() If get_user_pages_fast() allocates some pages but not as many as we wanted, then the current code leaks those pages. Call put_page() on the pages before returning.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a resource leak in the accel/qaic driver. When a page-mapping operation only partly succeeds, the kernel failed to release pages already obtained. The sources do not provide a CVSS score, business impact, or evidence of exploitation, so urgency depends on whether affected kernels and this driver are present in your fleet.

Executive priority

Prioritize as a targeted kernel maintenance issue, not a confirmed emergency. Focus on AI accelerator or specialized Linux systems first, then fold remaining affected kernels into normal patch cycles once vendor packages are available.

Technical view

CVE-2023-53633 fixes map_user_pages() in Linux accel/qaic. If get_user_pages_fast() returns fewer pages than requested after allocating some, the old logic returns without put_page() on those pages. This can leak kernel page references. The available record names Linux 6.4-era versions and stable kernel commits as references.

Likely exposure

Likely exposure is Linux systems running affected kernel versions with the accel/qaic driver code reachable. The source bundle identifies Linux 6.4, 6.4.7, and 6.5-related version data, but exact vendor kernel mapping should be verified against distro advisories.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of active exploitation, public exploit code, attack prerequisites, or remote reachability. Treat this as an exposure-management item unless vendor guidance assigns higher operational impact.

Researcher notes

The core condition is partial success from get_user_pages_fast() in map_user_pages(), followed by missing put_page() cleanup. Available sources do not define attacker control, privilege boundary, or impact class, so validation should stay evidence-based and avoid assuming exploitability.

Mitigation direction

  • Check Linux distributor advisories for CVE-2023-53633 applicability.
  • Upgrade to a vendor kernel containing the referenced stable fixes.
  • Prioritize systems with accel/qaic enabled or hardware-dependent workloads.
  • If qaic is unnecessary, follow vendor guidance for safely disabling it.

Validation and detection

  • Inventory kernel versions across Linux hosts.
  • Check whether accel/qaic is built, loaded, or used.
  • Map distro kernel packages to the referenced upstream fixes.
  • Confirm vulnerability scanners use updated CVE data.
Prepared
Confidence
medium
Sources
4

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.

ATT&CK lookup starting points

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CVE-2023-53633 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
3Source 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
LinuxLinux129776ac2e38231fa9c02ce20e116c99de291666, 129776ac2e38231fa9c02ce20e116c99de291666unaffected
LinuxLinux6.4, 0, 6.4.7, 6.5affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.