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CWE-416

9,595 CVEs • Abstraction: Variant • Likelihood of Exploit: High

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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CVEs (9,595)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Mozilla
2Firefox
Thunderbird
Oct 5, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 5, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the XSLT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 5, 2026
Sep 29, 2026
N/A· v4
9.6 CRITICAL· v3
N/A· v2
Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Fire...Show more
Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.Show less
1Mozilla
2Firefox
Thunderbird
Oct 5, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
9.6 CRITICAL· v3
N/A· v2
Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, an...Show more
Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.Show less
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
1Mozilla
2Firefox
Thunderbird
Oct 6, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Networking: Cache component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Mozilla
2Firefox
Thunderbird
Oct 13, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
1Mozilla
2Firefox
Thunderbird
Oct 13, 2026
Sep 29, 2026
N/A· v4
9.6 CRITICAL· v3
N/A· v2
Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, an...Show more
Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.Show less
1Mozilla
2Firefox
Thunderbird
Oct 13, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
1Mozilla
2Firefox
Thunderbird
Oct 13, 2026
Sep 29, 2026
N/A· v4
8.8 HIGH· v3
N/A· v2
Use-after-free in the Widget component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
1Wireshark
1Wireshark
Oct 8, 2026
Sep 29, 2026
N/A· v4
5.5 MEDIUM· v3
N/A· v2
ZigBee ZCL protocol dissector crash in 4.6.0 to 4.6.8 allows denial of service
-
-
Sep 30, 2026
Sep 28, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no l...Show more
In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no longer open before destroying them. The transport could then invoke a read callback that had been freed.Show less
-
-
Sep 30, 2026
Sep 28, 2026
N/A· v4
5.3 MEDIUM· v3
N/A· v2
In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and HTTPTransaction::onWebTransportBidiStream APIs could return stream handles that the stream handler had already freed....Show more
In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and HTTPTransaction::onWebTransportBidiStream APIs could return stream handles that the stream handler had already freed. HQSession then installed those handles as transport read callbacks, which could lead to use of freed memory.Show less
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-
Oct 1, 2026
Sep 28, 2026
N/A· v4
7.3 HIGH· v3
N/A· v2
In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, wh...Show more
In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.Show less