Bug 2025061 (CVE-2021-3974)

Summary:	CVE-2021-3974 vim: Use after free in regexp_nfa.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	adudiak, alcohan, aprice, bdettelb, caswilli, dfreiber, doconnor, drow, fjansen, gchamoul, gparvin, hkataria, jburrell, jdobes, jforrest, jkoehler, jmitchel, jsamir, jtanner, jwong, karsten, kaycoth, kholdawa, kshier, lcouzens, lphiri, mpierce, mskarbek, njean, orabin, owatkins, pahickey, psegedy, rblanco, rhaigner, stcannon, sthirugn, teagle, vkrizan, vkumar, vmugicag, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.3612	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in vim. A possible use-after-free vulnerability could allow an attacker to input a specially crafted file leading to a crash or code execution. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2025062, 2025404, 2025405
Bug Blocks:	2025066

Description Pedro Sampaio 2021-11-19 19:22:02 UTC

vim is vulnerable to Use After Free in regexp_nfa.c

https://github.com/vim/vim/commit/64066b9acd9f8cffdf4840f797748f938a13f2d6
https://huntr.dev/bounties/e402cb2c-8ec4-4828-a692-c95f8e0de6d4

Comment 1 Pedro Sampaio 2021-11-19 19:22:20 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2025062]