NVD / CVE Program· CNA SamsungMobile

CVE-2024-20833: Use after free vulnerability in pub_crypto_recv_msg prior to SMR Mar-2024 Release 1 due to race condition allows local attackers with system

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: 0.10% (FIRST EPSS).
Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
According to the record, no fixed version is available yet.
Severity is disputed: the assigning authority (CNA) scores it 4.1, NVD 6.4.

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

Use after free vulnerability in pub_crypto_recv_msg prior to SMR Mar-2024 Release 1 due to race condition allows local attackers with system privilege to cause memory corruption.

MediumCVSS 6.4 · v3.1—No exploit No fix recorded

Published: Mar 5, 2024
Updated: Jun 17, 2026
EPSS: 0.1% · 1th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 25 / 40 · 6.4 / 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.

CNA vs NVD score

NVD: 6.4
CNA · SamsungMobile: 4.1; 2.3 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

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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.

Vendor	Product	CPE
samsung	android	cpe:2.3:o:samsung:android

Affected versions

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

samsung android11.0
samsung android12.0
samsung android13.0
samsung android14.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (SamsungMobile). Independent of NVD's CPE analysis and usually ahead of it.

Samsung Mobile Samsung Mobile Devices
- SMR Mar-2024 Release in Android 11, 12, 13, 14not affected

Same product

samsung: all records

Other highest-scoring records for the same primary product.

CVE-2025-21042Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.KEV
80Now
CVE-2025-21043Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.KEV
70This week
CVE-2021-25487Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it resKEV
61This week

Published before and after this one in the same product

← EarlierCVE-2024-20835Mar 5, 2024 · Improper access control vulnerability in CustomFrequencyManagerService prior to SMR Mar-2024 Release 1 allows local attackers to execute pri
31Monitor
← EarlierCVE-2024-20836Mar 5, 2024 · Out of bounds Read vulnerability in ssmis_get_frm in libsubextractor.so prior to SMR Mar-2024 Release 1 allows local attackers to read out o
22Monitor
Later →CVE-2024-20842Apr 1, 2024 · Improper Input Validation vulnerability in handling apdu of libsec-ril prior to SMR Apr-2024 Release 1 allows local privileged attackers to
26Monitor

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-2023-21459355 days apartUse after free vulnerability in decon driver prior to SMR Mar-2023 Release 1 allows attackers to cause memory access fault.
39Monitor
CVE-2024-2086163 days apartUse after free vulnerability in SveService prior to SMR May-2024 Release 1 allows local privileged attackers to cause memory corruption.
26Monitor

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.
Administrator privileges are required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: High
Privileges required: High
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

security.samsungmobile.com/securityUpdate.smsb?year=2024&month=03

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

All records