CVE-2024-20833

Memory corruption via pub_crypto_recv_msg race

Published Mar 5, 2024 · Updated Aug 1, 2024

Use-after-free in NETLINKFIPSCRYPTO on Samsung Mobile Devices before SMR Mar-2024 Release 1 allows local users to corrupt memory. A race in pub_crypto_recv_msg ends an object's lifetime while the function can still use it, producing a stale reference. Exploitation requires system privilege on an affected Android 11, 12, 13, or 14 device; no confidentiality or availability impact is reported.

CVSS severity4.1
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in NETLINKFIPSCRYPTO on Samsung Mobile Devices before SMR Mar-2024 Release 1 allows local users to corrupt memory. A race in pub_crypto_recv_msg ends an object's lifetime while the function can still use it, producing a stale reference. Exploitation requires system privilege on an affected Android 11, 12, 13, or 14 device; no confidentiality or availability impact is reported.

The record

CVE
CVE-2024-20833
Published
Mar 5, 2024
Updated
Aug 1, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-416, CWE-367
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

6.4NIST NVDCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.1Samsung MobileCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

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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