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Snyk
Snyk
•added 2026/09/29 4:28 p.m.•11 views

Use After Free

Overview Affected versions of this package are vulnerable to Use After Free in the X.509 extension cache, which computes the cache under a read lock and then installs the result under a write lock, so concurrent threads each install their own result and free the previous one while another thread...

8.7CVSS6AI score0.00226EPSS
SaveExploits0References2
osv_cve
osv_cve
•added 2026/09/29 3:32 p.m.•10 views

CVE-2026-84783 Use-After-Free in X.509 Extension Cache Under Concurrent Use

Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS client, or a multi-threaded TLS server...

7.5CVSS6.2AI score
SaveExploits0References4
Cvelist
Cvelist
•added 2026/09/29 3:32 p.m.•45 views

CVE-2026-84783 Use-After-Free in X.509 Extension Cache Under Concurrent Use

Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS client, or a multi-threaded TLS server...

0.00226EPSS
SaveExploits0References2
Vulnrichment
Vulnrichment
•added 2026/09/29 3:32 p.m.•14 views

CVE-2026-84783 Use-After-Free in X.509 Extension Cache Under Concurrent Use

Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS client, or a multi-threaded TLS server...

6.4AI score0.00226EPSS
SaveExploits0References2
CVE
CVE
•added 2026/09/29 3:32 p.m.•74 views

CVE-2026-84783

A use-after-free vulnerability exists in OpenSSL 4.0 due to improper synchronization during the two-phase caching of decoded X.509v3 certificate extensions. When multiple threads simultaneously decode and cache extensions for a shared trusted CA certificate , a thread may free the cached data whi...

7.5CVSS6.4AI score0.00226EPSS
SaveExploits0References2Affected Software1
osv_ubuntu
osv_ubuntu
•added 2026/09/29 12:00 a.m.•15 views

UBUNTU-CVE-2026-84783

Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS client, or a multi-threaded TLS server...

7.5CVSS6.4AI score0.00226EPSS
SaveExploits0References3
UbuntuCve
UbuntuCve
•added 2026/09/29 12:00 a.m.•14 views

CVE-2026-84783

Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS client, or a multi-threaded TLS server...

7.5CVSS6.4AI score0.00226EPSS
SaveExploits0References2
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