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CVE-2019-8343

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

7.8 High

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.14%Up 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.8

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
CVE-2019-8343
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
CVE-2019-8343
Updated
2026-11-02
EUVDEUVD-2019-17733 No score

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
EUVD-2019-17733
Updated
2026-11-03
GitHub AdvisoriesGHSA-qcp9-cxhm-8cf6 7.8

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
GHSA-qcp9-cxhm-8cf6
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSVBELL-CVE-2019-8343 7.8

CVE-2019-8343 does not affect BellSoft software

Record
BELL-CVE-2019-8343
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 7.8

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
CVE-2019-8343
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-8343 7.8

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
DEBIAN-CVE-2019-8343
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-8343 7.8

In Netwide Assembler (NASM) 2.14.02, there is a use-after-free in paste_tokens in asm/preproc.c.

Record
UBUNTU-CVE-2019-8343
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
nasm
Debian:12
 All versions, plus listed versions
2.16.01-12.16.03-13.01-1
 None known
nasm
Debian:13
 All versions, plus listed versions
2.16.03-13.01-1
 None known
nasm
Debian:14
 All versions, plus listed versions
2.16.03-13.01-1
 None known
nasm
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.11.06-1really2.11.05-12.11.08-12.11.08-1ubuntu0.1
 None known
nasm
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.13.01-22.13.02-0.1
 None known
nasm
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.14.02-1
 None known
nasm
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
2.15.05-12.15.05-1ubuntu0.1~esm12.15.05-1ubuntu0.1~esm2
 None known
nasm
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
2.16.01-12.16.01-1build12.16.01-1ubuntu0.1~esm12.16.01-1ubuntu0.1~esm2
 None known
nasm
Ubuntu:25.10
 All versions, plus listed versions
2.16.03-1
 None known
nasm
Ubuntu:26.10
 All versions, plus listed versions
3.01-1
 None known
nasm
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.16.03-13.01-1
 None known

History

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

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

In short

CVE-2019-8343 is a high vulnerability (CVSS 7.8) in Nasm Netwide Assembler, published February 15, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.14%, the 66th percentile. No source names a fixed version.

References

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