Weakness (CWE)
CWE-416: 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
How to prevent it (2 mitigations)
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Architecture and Design
Choose a language that provides automatic memory management.
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Implementation
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
Source: MITRE CWE-416
156 results · Clear filters · Feed
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High 7.0CVE-2026-100204 Public exploit
HEIF Image Extensions Remote Code Execution Vulnerability
Use after free in HEIF Image Extensions allows an unauthorized attacker to execute code locally.
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High 8.8
Use after free in XML in Google Chrome prior to 157.0.8103.50 allowed a remote attacker to execute arbitrary code insid…
KEV Nov 10, 2026 -
High 8.1CVE-2026-124040 Public exploit
CivetWeb through 1.16 HTTP/2 Use-After-Free via Stale Pseudo-Header State
CivetWeb through 1.16, when built with USE_HTTP2 and enable_http2 on, contains a use-after-free vulnerability in handle_http2() that retains freed :method and :path pointers. Unauthenticated remote attackers can send a later HEADERS frame omitting these pseud…
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High 7.5CVE-2026-97206 Public exploit
DNS-over-QUIC (DoQ) path-migration can lead to use-after-free on multi-threaded deployments.
NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration can enter stream/connection cleanup while a mesh…
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High 8.8CVE-2026-110922 Public exploit
Use after free in Prerender in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code…
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High 8.1CVE-2026-97205 Public exploit
NGINX ngx_http_core_module vulnerability
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing “include virtual” commands may trigger a U…
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High 8.1CVE-2026-92392 Public exploit
HTTP/2 upload Use-After-Free
During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
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High 7.0CVE-2026-83834 Public exploit
Windows Kernel-Mode Drivers Elevation of Privilege Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
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High 8.8CVE-2026-93834 Public exploit
Qemu-kvm: 9pfs: use-after-free race in tlcreate/twalk allows vm guest escape
A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data…
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High 7.8CVE-2026-96889 Public exploit
Librsvg: use-after-free when xml includes have duplicated entities
A flaw was found in librsvg. When processing an SVG document containing nested XML inclusions (Xincludes) with duplicate entity declarations, a use-after-free error can occur. This vulnerability arises because the library incorrectly frees an XML entity that …
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High 8.8CVE-2026-91737 Public exploit
Use after free in PDF in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code insid…
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High 7.1CVE-2026-69451 Public exploit
Windows Management Instrumentation Elevation of Privilege Vulnerability
Use after free in Windows Management Instrumentation allows an authorized attacker to elevate privileges over a network.
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High 8.3CVE-2026-85048 Public exploit
Use after free in Compositing in Google Chrome prior to 152.0.7977.82 allowed a remote attacker who had compromised the…
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High 8.8CVE-2026-79266 Public exploit
Use after free in DevTools in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineer…
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High 7.5CVE-2026-65343 Public exploit
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 26.6.1 and iPadOS 26.6…
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High 7.0
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
KEV Aug 11, 2026 -
High 7.8CVE-2026-68398 Public exploit
ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF
In the Linux kernel, the following vulnerability has been resolved: ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF pppol2tp_recv() runs in the L2TP UDP-encap softirq RX path: l2tp_udp_encap_recv() -> l2tp_recv_common() -> pppol2tp_recv(…
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High 7.8CVE-2026-68121 Public exploit
pppoe: reload header pointer after dev_hard_header()
In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate th…
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High 7.5CVE-2026-56848 Public exploit
A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_…
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High 7.8CVE-2026-64563 Public exploit
rhashtable: clear stale iter->p on table restart
In the Linux kernel, the following vulnerability has been resolved: rhashtable: clear stale iter->p on table restart rhashtable_walk_start_check() has two restart paths when resuming a walk. When iter->walker.tbl is valid, it re-validates iter->p against the …
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High 8.8CVE-2026-50369 Public exploit
Windows Remote Desktop Services Elevation of Privilege Vulnerability
Use after free in Windows Remote Desktop Services allows an authorized attacker to elevate privileges over a network.
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High 8.8CVE-2026-53359 Public exploit
KVM: x86: Fix shadow paging use-after-free due to unexpected role
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad ("KVM: x86: Fix shadow paging use-after-free due to unexpected GFN") fixed a shadow paging mismatch betw…
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High 7.0CVE-2026-49417 Public exploit
Multiple vulnerabilities in the sound(4) mmap path
Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid. The freed memory could then be reused elsewhere while still accessible through the stale mapping. The /dev/dsp device nodes are world-…
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High 7.8CVE-2026-53264 Public exploit
net/sched: act_api: use RCU with deferred freeing for action lifecycle
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associated action. Let's illu…
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High 7.8CVE-2026-52943 Public exploit
net: skbuff: fix missing zerocopy reference in pskb_carve helpers
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: fix missing zerocopy reference in pskb_carve helpers pskb_carve_inside_header() and pskb_carve_inside_nonlinear() both copy the old skb_shared_info header into a new buffer via m…
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High 7.8CVE-2026-52910 Public exploit
bpf: Free reuseport cBPF prog after RCU grace period.
In the Linux kernel, the following vulnerability has been resolved: bpf: Free reuseport cBPF prog after RCU grace period. Eulgyu Kim reported the splat below with a repro. [0] The repro sets up a UDP reuseport group with a cBPF prog and replaces it with a new…
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High 8.1CVE-2026-42530 Public exploit
NGINX Open-Source ngx_http_v3_module vulnerability
NGINX Open Source has a vulnerability in the ngx_http_v3_module module. When NGINX Open Source is configured to use the HTTP/3 QUIC module, a remote unauthenticated attacker along with conditions beyond their control can use a specially crafted HTTP/3 session…
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High 7.8CVE-2026-42978 Public exploit
Windows Push Notifications Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
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High 8.8CVE-2026-45447 Public exploit
Heap Use-After-Free in the PKCS7_verify() Function
Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When…
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High 8.8CVE-2026-11118 Public exploit
Use after free in WebRTC in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code in…
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High 8.8CVE-2026-11117 Public exploit
Use after free in Views in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker to execute arbitra…
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High 8.8CVE-2026-11116 Public exploit
Use after free in Chromoting in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary cod…
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High 7.3CVE-2026-11115 Public exploit
Use after free in Updater in Google Chrome on Windows prior to 149.0.7827.53 allowed a local attacker to perform OS-lev…
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High 8.3CVE-2026-10961 Public exploit
Use after free in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker who had compr…
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High 7.8CVE-2026-46242 Public exploit
eventpoll: fix ep_remove struct eventpoll / struct file UAF
In the Linux kernel, the following vulnerability has been resolved: eventpoll: fix ep_remove struct eventpoll / struct file UAF ep_remove() (via ep_remove_file()) cleared file->f_ep under file->f_lock but then kept using @file inside the critical section (is_…
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High 8.3CVE-2026-9997 Public exploit
Use after free in Input in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the rend…
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High 7.8CVE-2026-43499 Public exploit
rtmutex: Use waiter::task instead of current in remove_waiter()
In the Linux kernel, the following vulnerability has been resolved: rtmutex: Use waiter::task instead of current in remove_waiter() remove_waiter() is used by the slowlock paths, but it is also used for proxy-lock rollback in rt_mutex_start_proxy_lock() when …
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High 7.8CVE-2026-43074 Public exploit
eventpoll: defer struct eventpoll free to RCU grace period
In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurr…
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High 7.7CVE-2026-23479 Public exploit
redis-server use-after-free in unblock client flow may allow remote code execution
Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flo…
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High 8.8CVE-2026-6300 Public exploit
Use after free in CSS in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code insi…