CVE-2025-8842

NASM Netwide Assember preproc.c do_directive use after free

A vulnerability has been found in NASM Netwide Assember 2.17rc0. Affected by this issue is the function do_directive of the file preproc.c. The manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. Es geht hierbei um die Funktion do_directive der Datei preproc.c. Mit der Manipulation mit unbekannten Daten kann eine use after free-Schwachstelle ausgenutzt werden. Der Angriff muss lokal passieren. Der Exploit steht zur öffentlichen Verfügung.

Affected

NASM · Netwide Assember

CVSS v4.0 VULDB

1.9 LOWCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 VULDB

5.3 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0 VULDB

4.3 MEDIUMAV:L/AC:L/Au:S/C:P/I:P/A:P

EPSS

0.24% chance of exploitation in the next 30 days, 14th percentile

Published

2025-08-11

Proof-of-concept exploits (1)

• https://drive.google.com/file/d/11vEV1vMHXO4BrDGhvWAMm0Qo1woiUwVV/view?usp=drive_link

Security advisories

• https://bugzilla.nasm.us/show_bug.cgi?id=3392933
• https://vuldb.com/?id.319376
• https://vuldb.com/?submit.623184

References

• CVE Record
• NVD entry