CVE-2021-30809: Use After Free

Reference Links

• https://support.apple.com/en-us/HT212814 (Advisory)
• https://support.apple.com/en-us/HT212815 (Advisory)
• https://support.apple.com/en-us/HT212816 (Advisory)
• https://support.apple.com/en-us/HT212819 (Advisory)
• https://support.apple.com/en-us/HT212869 (Advisory)
• http://www.openwall.com/lists/oss-security/2021/12/20/6
• https://support.apple.com/kb/HT212869

Parent vulnerabilities

(Appears in the following advisories)

• HT212816
• HT212869
• HT212819
• HT212815
• HT212814

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2021-30836
• CVE-2021-30861
• CVE-2021-30818
• CVE-2021-30823
• CVE-2021-30809
• CVE-2021-30846
• CVE-2021-30848
• CVE-2021-30849
• CVE-2021-30851
• CVE-2021-30930
• CVE-2021-30873
• CVE-2021-30876
• CVE-2021-30879
• CVE-2021-30877
• CVE-2021-30880
• CVE-2021-30994
• CVE-2021-30907
• CVE-2021-30899
• CVE-2021-30931
• CVE-2021-30866
• CVE-2021-30917
• CVE-2021-30903
• CVE-2021-30905
• CVE-2021-30919
• CVE-2020-9846
• CVE-2021-30881
• CVE-2021-30923
• CVE-2021-30831
• CVE-2021-30840
• CVE-2021-30852
• CVE-2021-30895
• CVE-2021-30896
• CVE-2021-30933
• CVE-2021-30906
• CVE-2021-30867
• CVE-2021-30814
• CVE-2021-30922
• CVE-2021-30824
• CVE-2021-30901
• CVE-2021-30821
• CVE-2021-30883
• CVE-2021-30924
• CVE-2021-30886
• CVE-2021-30909
• CVE-2021-30916
• CVE-2021-30864
• CVE-2021-30813
• CVE-2021-31011
• CVE-2021-30904
• CVE-2021-30910
• CVE-2021-30911
• CVE-2021-30874
• CVE-2021-30808
• CVE-2021-30920
• CVE-2021-31004
• CVE-2021-31002
• CVE-2021-30868
• CVE-2021-30912
• CVE-2021-30913
• CVE-2021-30915
• CVE-2021-31005
• CVE-2021-31008
• CVE-2021-30897
• CVE-2021-30884
• CVE-2021-30887
• CVE-2021-30888
• CVE-2021-30889
• CVE-2021-30890
• CVE-2021-30908
• CVE-2021-30833
• CVE-2021-30892
• CVE-2021-30837
• CVE-2021-30811
• CVE-2021-30834
• CVE-2021-30928
• CVE-2021-30882
• CVE-2021-30841
• CVE-2021-30842
• CVE-2021-30843
• CVE-2021-30835
• CVE-2021-30847
• CVE-2021-30857
• CVE-2013-0340
• CVE-2021-30855
• CVE-2021-30854
• CVE-2021-30925
• CVE-2021-30810
• CVE-2021-30838
• CVE-2021-30850
• CVE-2021-30825
• CVE-2021-30863
• CVE-2021-30816
• CVE-2021-30819
• CVE-2021-30898
• CVE-2021-30870
• CVE-2021-30815
• CVE-2021-31001
• CVE-2021-30826

Frequently Asked Questions

• What is CVE-2021-30809?

  CVE-2021-30809 is a vulnerability in WebKit that allows for a use-after-free attack due to a memory management issue.

• Which software is affected by CVE-2021-30809?

  CVE-2021-30809 affects Apple watchOS (up to version 8), Apple iOS (up to version 15), Apple iPadOS (up to version 15), Apple tvOS (up to version 15), Apple Safari (up to version 15), and Apple macOS Monterey (up to version 12.0.1).

• How severe is CVE-2021-30809?

  The severity of CVE-2021-30809 is not specified in the information provided.

• How can I fix CVE-2021-30809?

  To fix CVE-2021-30809, it is recommended to update the affected software to the latest versions provided by Apple.

• Where can I find more information about CVE-2021-30809?

  You can find more information about CVE-2021-30809 on the official Apple support page: [link](https://support.apple.com/en-us/HT212814).