CVE-2020-29394: A buffer overflow in the dlt_filter_load function in dlt_common.c from dlt-daemon through 2.18.5 (GENIVI Diagn

Q: How do I fix CVE-2020-29394?

diagnostic log and trace: upgrade to newer than 2.18.5; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2020-29394 being exploited?

CVE-2020-29394 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-29394 affect?

CVE-2020-29394 affects diagnostic log and trace, debian linux. Severity is high (CVSS 7.8). A buffer overflow in the dlt_filter_load function in dlt_common.c from dlt-daemon through 2.18.5 (GENIVI Diagnostic Log and Trace) allows arbitrary code execution because fscanf is misused (no limit on the number of characters to be read in

Q: How urgent is CVE-2020-29394?

Priority 57/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.8WATCHLISTUPGRADEMITIGATE

CVE-2020-29394 is a high-severity flaw (CVSS 7.8) affecting diagnostic log and trace, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow in the dlt_filter_load function in dlt_common.c from dlt-daemon through 2.18.5 (GENIVI Diagnostic Log and Trace) allows arbitrary code execution because fscanf is misused (no limit on the number of characters to be read in the format argument).

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-11-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · genivi

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-30 19:15 UTCPublished CVE record published
2026-06-17 03:11 UTCUpdated Record last modified

genivi diagnostic log and trace UPGRADE

Affected: <= 2.18.5

Fixed in: newer than 2.18.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy diagnostic-log-and-trace || rpm -q diagnostic-log-and-trace || diagnostic-log-and-trace --version

2. UPGRADE to newer than 2.18.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade diagnostic-log-and-trace

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade diagnostic-log-and-trace

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-29394?

diagnostic log and trace: upgrade to newer than 2.18.5; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-29394 being exploited?

CVE-2020-29394 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-29394 affect?

CVE-2020-29394 affects diagnostic log and trace, debian linux. Severity is high (CVSS 7.8). A buffer overflow in the dlt_filter_load function in dlt_common.c from dlt-daemon through 2.18.5 (GENIVI Diagnostic Log and Trace) allows arbitrary code execution because fscanf is misused (no limit on the number of characters to be read in

How urgent is CVE-2020-29394?

Priority 57/100. High severity; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2022-39837 MEDIUM 5.5 UPGRADE An issue was discovered in Connected Vehicle Systems Alliance (COVESA) dlt-daemon through 2.18.8
CVE-2022-39836 MEDIUM 5.5 UPGRADE An issue was discovered in Connected Vehicle Systems Alliance (COVESA) dlt-daemon through 2.18.8
CVE-2022-31291 HIGH 7.5 DOWNGRADE MITIGATE An issue in dlt_config_file_parser.c of dlt-daemon v2.18.8 allows attackers to cause a double free via crafted
CVE-2021-29507 MEDIUM 5.7 UPGRADE GENIVI Diagnostic Log and Trace (DLT) provides a log and trace interface
CVE-2020-36244 CRITICAL 9.8 UPGRADE MITIGATE The daemon in GENIVI diagnostic log and trace (DLT), is vulnerable to a heap-based buffer overflow that could

References

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