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NVD / CVE Program· CNA mitre

CVE-2023-47252: An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6.

Noroxi assessment

Priority: Monitor (action score 25/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An issue was discovered in PnpSmm in Insyde InsydeH2O with kernel 5.0 through 5.6. There is a possible out-of-bounds access in the SMM communication buffer, leading to tampering. The PNP-related SMI sub-functions do not verify data size before getting it from the communication buffer, which could lead to possible circumstances where the data immediately following the command buffer could be destroyed with a fixed value. This is fixed in kernel 5.2 v05.28.45, kernel 5.3 v05.37.45, kernel 5.4 v05.45.45, kernel 5.5 v05.53.45, and kernel 5.6 v05.60.45.

MediumCVSS 6.3 · v3.1—No exploit No fix recorded
Published
Apr 25, 2024
Updated
Jun 17, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
25 / 40 · 6.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-47252

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
insydekernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • insyde kernel5.2 and later · before 5.28.45
  • insyde kernel5.3 and later · before 5.37.45
  • insyde kernel5.4 and later · before 5.45.45
  • insyde kernel5.5 and later · before 5.53.45
  • insyde kernel5.6 and later · before 5.60.45

Same product

insyde: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-36337An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.
    32Monitor
  • CVE-2022-29279Use of a untrusted pointer allows tampering with SMRAM and OS memory in SdHostDriver and SdMmcDevice Use of a untrusted pointer allows tampe
    32Monitor
  • CVE-2022-29278Incorrect pointer checks within the NvmExpressDxe driver can allow tampering with SMRAM and OS memory Incorrect pointer checks within the Nv
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2023-28468Aug 3, 2023 · An issue was discovered in FvbServicesRuntimeDxe in Insyde InsydeH2O with kernel 5.0 through 5.5.
    26Monitor
  • ← EarlierCVE-2022-46897Apr 22, 2024 · An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.
    21Monitor
  • Later →CVE-2024-25078May 15, 2024 · A memory corruption vulnerability in StorageSecurityCommandDxe in Insyde InsydeH2O before kernel 5.2: IB19130163 in 05.29.07, kernel 5.3: IB
    29Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2022-36337520 days apartAn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.
    32Monitor
  • CVE-2022-29276527 days apartSMI functions in AhciBusDxe use untrusted inputs leading to corruption of SMRAM.
    32Monitor
  • CVE-2022-30771527 days apartInitialization function in PnpSmm could lead to SMRAM corruption when using subsequent PNP SMI functions Initialization function in PnpSmm c
    32Monitor
  • CVE-2022-30772527 days apartManipulation of the input address in PnpSmm function 0x52 could be used by malware to overwrite SMRAM or OS kernel memory.
    32Monitor
  • CVE-2022-35407521 days apartAn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5.
    31Monitor
  • CVE-2022-35897521 days apartAn stack buffer overflow vulnerability leads to arbitrary code execution issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.
    27Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records