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CVE Record

CVE-2023-53320: scsi: mpi3mr: Fix issues in mpi3mr_get_all_tgt_info()

In the Linux kernel, the following vulnerability has been resolved: scsi: mpi3mr: Fix issues in mpi3mr_get_all_tgt_info() The function mpi3mr_get_all_tgt_info() has four issues: 1) It calculates valid entry length in alltgt_info assuming the header part of the struct mpi3mr_device_map_info would equal to sizeof(u32). The correct size is sizeof(u64). 2) When it calculates the valid entry length kern_entrylen, it excludes one entry by subtracting 1 from num_devices. 3) It copies num_device by calling memcpy(). Substitution is enough. 4) It does not specify the calculated length to sg_copy_from_buffer(). Instead, it specifies the payload length which is larger than the alltgt_info size. It causes "BUG: KASAN: slab-out-of-bounds". Fix the issues by using the correct header size, removing the subtraction from num_devices, replacing the memcpy() with substitution and specifying the correct length to sg_copy_from_buffer().

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2023-53320 is a Linux kernel memory safety flaw in the mpi3mr SCSI driver. A local user could potentially trigger out-of-bounds kernel memory access, risking system compromise or crash. It is high severity, but the provided sources do not show active exploitation.

Executive priority

Treat as a high-priority kernel patching item, especially for shared Linux infrastructure. Business urgency is driven by local privilege and kernel memory impact, not by evidence of active exploitation in the supplied sources.

Technical view

The flaw is in mpi3mr_get_all_tgt_info(). Incorrect entry-length calculations and an oversized sg_copy_from_buffer() length can cause a KASAN-reported slab out-of-bounds condition. The CVSS 3.1 vector is local, low-complexity, low-privilege, no user interaction, with high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely on Linux systems running affected kernel builds where the mpi3mr SCSI driver is present and reachable by local users. The source data names Linux kernel versions and commits, but exact distribution-specific affected ranges require vendor validation.

Exploitation context

The provided CVE data rates exploitation as local with low privileges required. CISA KEV is false, and no cited source in the bundle states active exploitation or public weaponization.

Researcher notes

The root issue is CWE-787 out-of-bounds write/read risk from miscalculated device-map buffer sizing. Source evidence supports local attack requirements and high CIA impact, but does not provide a complete, distribution-ready affected-version matrix.

Mitigation direction

  • Apply Linux kernel updates containing the upstream stable fixes.
  • Use distribution vendor advisories to confirm fixed package versions.
  • Prioritize multi-user systems and hosts using mpi3mr-related storage paths.
  • Restrict unnecessary local shell access on exposed affected systems.
  • Track kernel update completion through normal patch governance.

Validation and detection

  • Inventory Linux kernel versions across affected server groups.
  • Determine whether the mpi3mr driver is present or loaded.
  • Map installed distro kernels against vendor fixed-version guidance.
  • Confirm patched kernels include one of the cited stable fixes.
  • Review local-user exposure on systems awaiting patching.
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

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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cwe · low confidence lookup

CWE-787: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2023-53320 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/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
1ADP providers
4Source links

SSVC decision data

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

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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2023-53320Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/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

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf5e6d5a343761081317c89d23489c93fbafc69ff, f5e6d5a343761081317c89d23489c93fbafc69ff, f5e6d5a343761081317c89d23489c93fbafc69ffunaffected
LinuxLinux5.19, 0, 6.1.16, 6.2.3, 6.3affected
Weakness

CWE details

CWE-787

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