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CVE-2019-16165

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

6.5 MediumFix available

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.15%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
CVE-2019-16165
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
CVE-2019-16165
Updated
2026-11-02
EUVDEUVD-2019-6985 No score

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
EUVD-2019-6985
Updated
2026-11-03
GitHub AdvisoriesGHSA-cw7j-m6w2-86v9 6.5

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
GHSA-cw7j-m6w2-86v9
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 6.5

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
CVE-2019-16165
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-16165 6.5

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
DEBIAN-CVE-2019-16165
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-16165 6.5

GNU cflow through 1.6 has a use-after-free in the reference function in parser.c.

Record
UBUNTU-CVE-2019-16165
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11709-1 No score

cflow-1.7-1.1 on GA media

These are all security issues fixed in the cflow-1.7-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11709-1
Updated
2026-11-02
OSVUSN-5375-1 No score

cflow vulnerability

It was discovered that GNU cflow was incorrectly handling memory cleanup operations at the end of a compilation module. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

Record
USN-5375-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
cflow
Debian:12
 before 1:1.6-6
1:1.6-6
cflow
Debian:13
 before 1:1.6-6
1:1.6-6
cflow
Debian:14
 before 1:1.6-6
1:1.6-6
cflow
Ubuntu:Pro:16.04:LTS
 before 1:1.4+dfsg1-3ubuntu1.16.04.1~esm1, plus listed versions
1:1.4+dfsg1-3ubuntu1
1:1.4+dfsg1-3ubuntu1.16.04.1~esm1
cflow
Ubuntu:Pro:18.04:LTS
 before 1:1.4+dfsg1-3ubuntu1.18.04.1~esm1, plus listed versions
1:1.4+dfsg1-3ubuntu1
1:1.4+dfsg1-3ubuntu1.18.04.1~esm1
cflow
Ubuntu:20.04:LTS
 All versions, plus listed versions
1:1.6-4
 None known
cflow
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 1.7-1.1
1.7-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-16165 is a medium vulnerability (CVSS 6.5) in Gnu Cflow, published September 9, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 66th percentile. Fixed in cflow 1:1.6-6.

References

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