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CVE Record

CVE-2023-53361: LoongArch: mm: Add p?d_leaf() definitions

In the Linux kernel, the following vulnerability has been resolved: LoongArch: mm: Add p?d_leaf() definitions When I do LTP test, LTP test case ksm06 caused panic at break_ksm_pmd_entry -> pmd_leaf (Huge page table but False) -> pte_present (panic) The reason is pmd_leaf() is not defined, So like commit 501b81046701 ("mips: mm: add p?d_leaf() definitions") add p?d_leaf() definition for LoongArch.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel reliability issue affecting LoongArch systems. A local, low-privileged user can trigger a kernel panic in memory-management paths, causing service outage. The sources do not indicate data theft, privilege escalation, or remote attack capability.

Executive priority

Treat as a targeted availability risk. It is not a broad internet-facing emergency, but unpatched LoongArch systems with local users or hosted workloads should be patched on the normal security cycle.

Technical view

LoongArch kernel memory-management code lacked p?d_leaf() definitions. In the reported path, KSM testing reached break_ksm_pmd_entry, pmd_leaf returned false for a huge page table, and pte_present triggered a panic. CVSS is 5.5 with local access, low complexity, low privileges, and high availability impact.

Likely exposure

Exposure appears limited to Linux deployments on LoongArch architecture running affected kernel versions or unpatched downstream kernels. General x86 or Arm Linux fleets are not indicated as affected by the supplied sources.

Exploitation context

The bundle says the issue was observed during LTP ksm06 testing and does not report active exploitation. KEV is false. The attack model is local, authenticated access causing denial of service, not remote compromise.

Researcher notes

Evidence is concise and kernel-focused. The root cause and panic path are described, but the bundle does not provide broad affected-distribution mapping, exploit reports, or operational mitigations beyond applying the stable fixes.

Mitigation direction

  • Upgrade to a kernel or vendor package containing the referenced LoongArch p?d_leaf() fixes.
  • Prioritize externally hosted or multi-tenant LoongArch systems where local users can run workloads.
  • Check distribution advisories because downstream kernels may backport fixes without changing major versions.
  • If immediate patching is blocked, consult vendor guidance for risk-reduction options.

Validation and detection

  • Inventory LoongArch hosts and record exact kernel package versions.
  • Compare deployed kernels with CVE and distribution advisory status.
  • Confirm the kernel source or package includes the referenced LoongArch p?d_leaf() change.
  • Review kernel panic logs for KSM, huge page, or break_ksm_pmd_entry signatures.
Prepared
Confidence
high
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-2023-53361 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
1ADP providers
5Source 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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2023-53361Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux09cfefb7fa70c3af011b0db0a513fd80b2f18abc, 09cfefb7fa70c3af011b0db0a513fd80b2f18abc, 09cfefb7fa70c3af011b0db0a513fd80b2f18abc, 09cfefb7fa70c3af011b0db0a513fd80b2f18abcunaffected
LinuxLinux5.19, 0, 6.1.53, 6.4.16, 6.5.3, 6.6affected
Weakness

CWE details

No CWE listed

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