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Bug 810423 (CVE-2020-18974, CVE-2021-45256, CVE-2021-45257) - dev-lang/nasm: multiple vulnerabilities
Summary: dev-lang/nasm: multiple vulnerabilities
Alias: CVE-2020-18974, CVE-2021-45256, CVE-2021-45257
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [upstream]
Depends on:
Reported: 2021-08-25 19:25 UTC by John Helmert III
Modified: 2021-12-23 08:35 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2021-08-25 19:25:25 UTC

Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.

Upstream issue is currently untouched.
Comment 1 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2021-12-23 08:35:31 UTC
CVE-2021-45256 (

A Null Pointer Dereference vulnerability existfs in nasm 2.16rc0 via asm/preproc.c.

CVE-2021-45257 (

An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.

Can't tell if there's been any action taken upstream as their Bugzilla seems to be down.