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Fencer Vulns
high 7.8

CVE-2022-46456 json

NASM v2.16 was discovered to contain a global buffer overflow in the component dbgdbg_typevalue at /output/outdbg.c.

published 2023-01-04 3 y ago modified 2026-07-25 3 mo ago also EUVD-2022-49261 , JLSEC-2026-204

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

NASM v2.16 was discovered to contain a global buffer overflow in the component dbgdbg_typevalue at /output/outdbg.c.

Patch / fix

  • julia NASM_jll 2.16.3+0
  • nasm Azure Linux 3.0 2.16.01-2

azure linux advisories AZL-35024

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-46456 updated cvss 6.1

nasm: buffer overflow in dbgdbg_typevalue() in output/outdbg.c

  • Red Hat Enterprise Linux 6 nasm, nasm-rdoff Red Hat Enterprise Linux 7 nasm, nasm-rdoff
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.nasm.us https://bugzilla.nasm.us/show_bug.cgi?id=3392814 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia NASM_jll
>=2.16.1+0, <2.16.3+0
2.16.3+0

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.