CVE-2021-30748: Input Validation
Published Jul 19, 2021
·Updated
A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. An application may be able to execute arbitrary code with kernel privileges.
Credit
George Nosenko, JunDong Xie(Ant Security Light), ryuzaki, Mickey Jin@@patch1t(Trend Micro), Sunglin(Knownsec 404 team), Yizhuo Wang(Group of Software Security In Progress), Tim Michaud@@TimGMichaud(Zoom Video Communications), Linus Henze (pinauten.de), Csaba Fitzl@@theevilbit(Offensive Security), tr3e(Trend Micro Zero Day Initiative), hjy79425575(Trend Micro Zero Day Initiative), Matthew Denton(Google Chrome Security), Jzhu(Baidu Security), Ye Zhang@@co0py_Cat(Baidu Security), CFF(Topsec Alpha Team), CVE-2021-3518, CVE-2018-25010, CVE-2018-25011, CVE-2018-25014, CVE-2020-36328, CVE-2020-36329, CVE-2020-36330, CVE-2020-36331, Anonymous(Trend Micro Zero Day Initiative), Christoph Guttandin(Media Codings), Sergei Glazunov(Google Project Zero), Ivan Fratric(Google Project Zero), vm_call, Nozhdar Abdulkhaleq Shukri, Zachary Keffaber@@QuickUpdate5, Denis Tokarev@@illusionofcha0s, tr3e, Zhongcheng Li (CK01), Ron Waisberg@@epsilan, Gary Nield(ECSC Group plc), Wojciech Reguła@@_r3ggi(SecuRing), Matt Shockley (twitter.com/mattshockl)(Offensive Security), Liu Long(Ant Security Light), Yinyi Wu@@3ndy1(Qihoo 360 Vulcan Team), Zuozhi Fan@@pattern_F_(Ant Security TianQiong Lab), Georgi Valkov (httpstorm.com), Mickey Jin@@patch1t(Trend Micro working with Trend Micro Zero Day Initiative), ABC Research s.r.o
Affected Software
8 affected componentsFixes available
Apple macOS Big Sur<11.5
11.5
Apple tvOS<14.7
14.7
Apple iPadOS<14.7
Apple iPhone OS<14.7
Apple macOS<11.5
Apple tvOS<14.7
Apple iOS<14.7
14.7
Apple iPadOS<14.7
14.7
Event History
Jul 19, 2021
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Jul 21, 2021
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Sep 8, 2021
CVE Published
via MITRE·01:44 PM
Data Sourced
via MITRE·01:44 PM
DescriptionWeakness
Feb 24, 2026
Updated
via Apple·07:00 PM
DescriptionWeaknessAffected Software
Updated
via Apple·07:00 PM
DescriptionAffected Software
Frequently Asked Questions
1
What is CVE-2021-30748?
CVE-2021-30748 is a memory corruption issue in AVEVideoEncoder that has been addressed with improved state management.
2
How does CVE-2021-30748 impact Apple tvOS?
CVE-2021-30748 affects Apple tvOS up to version 14.7.
3
How does CVE-2021-30748 impact Apple macOS Big Sur?
CVE-2021-30748 affects Apple macOS Big Sur up to version 11.5.
4
How can I fix CVE-2021-30748 on Apple tvOS?
To fix CVE-2021-30748 on Apple tvOS, update to version 14.7 or later.
5
How can I fix CVE-2021-30748 on Apple macOS Big Sur?
To fix CVE-2021-30748 on Apple macOS Big Sur, update to version 11.5 or later.