# CVE-2020-21528: nasm: A Segmentation Fault issue discovered in in ieee_segment function in outieee.c in nasm 2.14.03 and 2.15 allows remote...

CVE-2020-21528 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2020-21528, released August 22, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-21528
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 22, 2023

## Description

A Segmentation Fault issue discovered in in ieee_segment function in outieee.c in nasm 2.14.03 and 2.15 allows remote attackers to cause a denial of service via crafted assembly file.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | nasm Debian 12.15 (bookworm) | 2.16.01-1 | [DEBIAN-CVE-2020-21528](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21528.md) | Aug 22, 2023 |
| Linux | nasm Debian 13.5 (trixie) | 2.16.01-1 | [DEBIAN-CVE-2020-21528](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21528.md) | Aug 22, 2023 |
| Linux | nasm Debian 14 | 2.16.01-1 | [DEBIAN-CVE-2020-21528](https://patchblox.com/security/data/fix/linux/debian-cve-2020-21528.md) | Aug 22, 2023 |
| Linux | nasm amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |
| Linux | nasm-debuginfo amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |
| Linux | nasm-debugsource amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |
| Linux | nasm-doc amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |
| Linux | nasm-rdoff amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |
| Linux | nasm-rdoff-debuginfo amzn 2023 | 2.15.05-1.amzn2023.0.5 | [ALAS2023-2023-354](https://patchblox.com/security/data/fix/linux/alas2023-2023-354.md) | Sep 14, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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