CVE-2022-39836Public exploit

Process crash via one-byte heap over-read

Published Oct 24, 2022 · Updated May 7, 2025

Heap buffer over-read in COVESA dlt-daemon 2.18.8 and earlier allows local users to crash dlt-convert via a crafted DLT file. dlt_print_hex_string_delim in src/shared/dlt_common.c reads one byte beyond a heap allocation while dlt_message_payload converts malformed file data. Processing the file with dlt-convert -m requires user interaction and causes a process crash, with no reported code execution or data modification.

CVSS severity5.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in COVESA dlt-daemon 2.18.8 and earlier allows local users to crash dlt-convert via a crafted DLT file. dlt_print_hex_string_delim in src/shared/dlt_common.c reads one byte beyond a heap allocation while dlt_message_payload converts malformed file data. Processing the file with dlt-convert -m requires user interaction and causes a process crash, with no reported code execution or data modification.

The record

CVE
CVE-2022-39836
Published
Oct 24, 2022
Updated
May 7, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, CAPEC-540, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 24, 2022CVE publishedPublication date reported by the CVE source.
  2. May 7, 2025Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1203Exploitation for Client Execution

Public exploit references

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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