CVE-2021-38504

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published: Dec 8, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-385056.5Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record data copied to the clipboard to the CVE-2021-385064.3Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to CVE-2021-385076.5The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual CVE-2021-385084.3By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validit CVE-2021-385094.3Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be d CVE-2021-38515.4firefly-iii is vulnerable to URL Redirection to Untrusted Site CVE-2021-385108.8The executable file warning was not presented when downloading .inetloc files, which, due to a flaw in Mac OS, can run commands on a user's CVE-2021-385117.5An issue was discovered in the tar crate before 0.4.36 for Rust. When symlinks are present in a TAR archive, extraction can create arbitrary CVE-2021-385127.5An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust. HTTP/1 request smuggling (aka HRS) can occur, potentially lead CVE-2021-385139.8Certain NETGEAR devices are affected by authentication bypass. This affects RBK852 before 3.2.10.11, RBR850 before 3.2.10.11, RBS850 before CVE-2021-385142.7Certain NETGEAR devices are affected by authentication bypass. This affects D3600 before 1.0.0.72, D6000 before 1.0.0.72, D6100 before 1.0.0 CVE-2021-385157.5Certain NETGEAR devices are affected by denial of service. This affects R6400v2 before 1.0.4.98, R6700v3 before 1.0.4.98, R7900 before 1.0.3