NVD / CVE Program· CNA certcc

CVE-2026-6068: NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the

Noroxi assessment

Priority: Monitor (action score 38/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: nasm (openSUSE:Leap 16.0) 3.02-160000.1.1; nasm (openSUSE:Tumbleweed) 3.02-1.1; nasm (SUSE:Linux Enterprise Module for Development Tools 15 SP7) 2.16.03-150700.3.3.1.

Low priority for now. Upgrade to nasm (openSUSE:Leap 16.0) 3.02-160000.1.1; nasm (openSUSE:Tumbleweed) 3.02-1.1; nasm (SUSE:Linux Enterprise Module for Development Tools 15 SP7) 2.16.03-150700.3.3.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

NASM contains a heap use after free vulnerability in response file (-@) processing where a dangling pointer to freed memory is stored in the global depend_file and later dereferenced, as the response-file buffer is freed before the pointer is used, allowing for data corruption or remote code execution.

CriticalCVSS 9.6 · v3.1—No exploit Fix available

Published: Apr 10, 2026
Updated: Jun 17, 2026
EPSS: 0.4% · 36th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 38 / 40 · 9.6 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: proof of concept
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
nasm	netwide assembler	cpe:2.3:a:nasm:netwide_assembler

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

nasm netwide assembler3.02

Versions reported by the vendor

Affected version ranges reported by the assigning authority (certcc). Independent of NVD's CPE analysis and usually ahead of it.

NASM NASM
- nasm-3.02rc5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	nasm	from 0	—
openSUSE:Leap 16.0	nasm	before 3.02-160000.1.1	3.02-160000.1.1
openSUSE:Tumbleweed	nasm	before 3.02-1.1	3.02-1.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7	nasm	before 2.16.03-150700.3.3.1	2.16.03-150700.3.3.1

Same product

nasm: all records

Other highest-scoring records for the same primary product.

CVE-2004-1287Buffer overflow in the error function in preproc.c for NASM 0.98.38 1.2 allows attackers to execute arbitrary code via a crafted asm file, a
45Plan
CVE-2020-24978In NASM 2.15.04rc3, there is a double-free vulnerability in pp_tokline asm/preproc.c.
39Monitor
CVE-2008-7177Buffer overflow in the listing module in Netwide Assembler (NASM) before 2.03.01 has unknown impact and attack vectors, a different vulnerab
38Monitor

Published before and after this one in the same product

← EarlierCVE-2025-8846Aug 11, 2025 · NASM Netwide Assember parser.c parse_line stack-based overflow
7Monitor
← EarlierCVE-2026-6067Apr 10, 2026 · A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function
22Monitor
Later →CVE-2026-6069Apr 10, 2026 · NASM’s disasm() function contains a stack based buffer overflow when formatting disassembly output, allowing an attacker triggered out-of-bo
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
opensuse:nasm	3.02-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
suse:nasm	2.16.03-150700.3.3.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

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