CVE-2021-47210

System crash via oversized TPS6598x block read

Published Apr 10, 2024 · Updated Aug 11, 2026

Improper bounds handling in the Linux kernel allows local users to crash panic-on-warn systems through the TPS6598x USB Type-C driver. The tps6598x_block_read function invokes WARN_ON when len plus one exceeds its fixed data buffer, even though it then returns EINVAL. Reaching the failure requires the affected driver path and an oversized read request, and a system crash occurs only when panic-on-warn is enabled.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper bounds handling in the Linux kernel allows local users to crash panic-on-warn systems through the TPS6598x USB Type-C driver. The tps6598x_block_read function invokes WARN_ON when len plus one exceeds its fixed data buffer, even though it then returns EINVAL. Reaching the failure requires the affected driver path and an oversized read request, and a system crash occurs only when panic-on-warn is enabled.

The record

CVE
CVE-2021-47210
Published
Apr 10, 2024
Updated
Aug 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.19
  2. Affected versionversion=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <2a897d384513ba7f7ef05611338b9a6ec6aeac00
  3. Affected versionversion=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <2c71811c963b6c310a29455d521d31a7ea6c5b5e
  4. Affected versionversion=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <30dcfcda8992dc42f18e7d35b6a1fa72372d382d
  5. Affected versionversion=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <b7a0a63f3fed57d413bb857de164ea9c3984bc4e
  6. Affected versionversion=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <eff8b7628410cb2eb562ca0d5d1f12e27063733e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <2a897d384513ba7f7ef05611338b9a6ec6aeac00; version=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <2c71811c963b6c310a29455d521d31a7ea6c5b5e; version=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <30dcfcda8992dc42f18e7d35b6a1fa72372d382d; version=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <b7a0a63f3fed57d413bb857de164ea9c3984bc4e; version=8d361fa2c29dcaf258f71e70cd75ff51084c3e5e <eff8b7628410cb2eb562ca0d5d1f12e27063733e

Published CVSS scores

5.5NISTCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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