CVE-2026-6067 | NASM Netwide Assembler 3.02rc5 obj_directive out-of-bounds write

VDB-356816 · CVE-2026-6067 · GCVE-0-2026-6067 NASM NETWIDE ASSEMBLER 3.02RC5 OBJ_DIRECTIVE OUT-OF-BOUNDS WRITE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 2.13+ Summaryinfo A vulnerability described as critical has been identified in NASM Netwide Assembler 3.02rc5. This impacts the function obj_directive. Such manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2026-6067. The attack needs to be performed locally. There is not any exploit available. Detailsinfo A vulnerability, which was classified as critical, has been found in NASM Netwide Assembler 3.02rc5. Affected by this issue is the function obj_directive. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes: A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-6067 since 04/10/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/10/2026). There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Programming Tool Software Vendor NASM Name Netwide Assembler Version 3.02rc5 License open-source CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds write CWE: CWE-787 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/10/2026 Advisory disclosed 04/10/2026 +0 days CVE reserved 04/10/2026 +0 days VulDB entry created 04/10/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Confirmed CVE: CVE-2026-6067 (🔒) GCVE (CVE): GCVE-0-2026-6067 GCVE (VulDB): GCVE-100-356816 Entryinfo Created: 04/10/2026 15:51 Updated: 04/10/2026 15:58 Changes: 04/10/2026 15:51 (52), 04/10/2026 15:54 (2), 04/10/2026 15:58 (1) Complete: 🔍 Cache ID: 99:909:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸