CVE-2021-47609

Kernel crash via unchecked device-tree name copy

Published Jun 19, 2024 · Updated May 11, 2026

Buffer overflow in the Linux SCPI power-domain driver allows local users to crash the kernel through an oversized device-tree node name. The scpi_pm_domain_probe function uses sprintf to append a domain index to np->name in a fixed 30-byte scpi_pd->name buffer without checking the result length. Exploitation requires the SCPI power-domain driver to process a crafted device-tree node name; the documented consequence is a kernel crash.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux SCPI power-domain driver allows local users to crash the kernel through an oversized device-tree node name. The scpi_pm_domain_probe function uses sprintf to append a domain index to np->name in a fixed 30-byte scpi_pd->name buffer without checking the result length. Exploitation requires the SCPI power-domain driver to process a crafted device-tree node name; the documented consequence is a kernel crash.

The record

CVE
CVE-2021-47609
Published
Jun 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-120, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8
  2. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <4694b1ec425a2d20d6f8ca3db594829fdf5f2672
  3. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <639901b9429a3195e0fead981ed74b51f5f31538
  4. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <7e8645ca2c0046f7cd2f0f7d569fc036c8abaedb
  5. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <802a1a8501563714a5fe8824f4ed27fec04a0719
  6. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <865ed67ab955428b9aa771d8b4f1e4fb7fd08945
  7. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <976389cbb16cee46847e5d06250a3a0b5506781e
  8. Affected versionversion=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <f0f484714f35d24ffa0ecb4afe3df1c5b225411d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <4694b1ec425a2d20d6f8ca3db594829fdf5f2672; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <639901b9429a3195e0fead981ed74b51f5f31538; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <7e8645ca2c0046f7cd2f0f7d569fc036c8abaedb; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <802a1a8501563714a5fe8824f4ed27fec04a0719; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <865ed67ab955428b9aa771d8b4f1e4fb7fd08945; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <976389cbb16cee46847e5d06250a3a0b5506781e; version=8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7 <f0f484714f35d24ffa0ecb4afe3df1c5b225411d

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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