HOMEVULNERABILITIESCVE-2021-42252
HIGH

CVE-2021-42252

NVD-CWE-noinfoPublished: October 11, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An issue was discovered in aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.

NVD Source

Technical Analysis

CVE-2021-42252 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp18 product(s)
h300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300eh500e firmwareh500eh700e firmwareh700e+6
Source: NVD CPE · 19 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6
ADVISORYhttps://security.netapp.com/advisory/ntap-20211112-0006/
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6
ADVISORYhttps://security.netapp.com/advisory/ntap-20211112-0006/

All References (6)

→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20211112-0006/Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.6Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b49a0e69a7b1a68c8d3f64097d06dabb770fec96Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20211112-0006/Third Party Advisory

Quick Facts

CVE IDCVE-2021-42252
CVSS Score7.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedOct 11, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2005-2700
10.0
CVE-2013-2422
10.0
CVE-2005-2222
10.0
CVE-2026-46798
10.0
CVE-2009-2452
10.0
CVE-2005-3463
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-42252 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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