Use After Free
CWE-416
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 Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.
We track 4,465 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.3. 109 have been exploited in real attacks.
How this weakness is prevented
- Architecture and Design: Choose a language that provides automatic memory management.
- 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.
Latest Use After Free vulnerabilities
- 8.3 High severity
Chrome: Use After Free
Use after free in Dawn in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in FullScreen in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 7.5 High severity
Chrome: Use After Free
Use after free in WebAuthentication in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in Network in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in WebRTC in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in Ozone in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 7.5 High severity
Chrome: Use After Free
Use after free in Passwords in Google Chrome on Mac prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specific UI gestures to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 7.5 High severity
Chrome: Use After Free
Use after free in Passwords in Google Chrome on Mac prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
- 7.5 High severity
Chrome: Use After Free
Use after free in Ozone in Google Chrome on Linux prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Ozone in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 8.3 High severity
Chrome: Use After Free
Use after free in Printing in Google Chrome on Linux prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Chromoting in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in GFX in Google Chrome on Linux prior to 149.0.7827.53 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Cast in Google Chrome prior to 149.0.7827.53 allowed an attacker on the local network segment to potentially exploit heap corruption via malicious network traffic. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Cast Streaming in Google Chrome prior to 149.0.7827.53 allowed an attacker on the local network segment to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)
- 8.1 High severity
Chrome: Use After Free
Use after free in Chromoting in Google Chrome on Mac prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)
- 9.6 Critical severity
Chrome: Use After Free
Use after free in FileSystem in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 8.3 High severity
Chrome: Use After Free
Use after free in Chromecast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
- 8.8 High severity
Chrome: Use After Free
Use after free in Network in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)
- 7.5 High severity
HTML::Entities: Use After Free
HTML::Entities versions before 3.84 for Perl read freed heap memory in _decode_entities. The XS routine backing HTML::Entities::_decode_entities cached a pointer (repl) into the entity-value SV returned by hv_fetch on the entity2char hash. When the input SV wa
- 8.4 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` hand
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: nfc: hci: shdlc: Stop timers and work before freeing context llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc structure while its timers and state machine work may still be a
- 8.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: drm/xe/pf: Fix sysfs initialization In case of devm_add_action_or_reset() failure the provided cleanup action will be run immediately on the not yet initialized kobject. This may lead to error
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection, which lead
- 7.8 High severity
Linux: Use After Free
In the Linux kernel, the following vulnerability has been resolved: power: supply: pm8916_lbc: Fix use-after-free for extcon in IRQ handler Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `extcon` handle
- 7.8 High severity
optee_os: Use After Free
OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.16.0 and prior to 4.11.0, a user-after-free (UAF) race condition exists in t
- 7.8 High severity
Linux: Use After Free
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_f
- 8.8 High severity
FreeRDP: Double Free
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's RDPEAR NDR parser accepts one non-null NDR pointer ref-id for multiple logical pointer fields without tracking the pointed object's expected NDR type or ownership. When
- 8.3 High severity
Chrome: Use After Free
Use after free in Input in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in WebXR in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in Core in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in Views in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted PDF file. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in Network in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
- 7.5 High severity
Chrome: Use After Free
Use after free in WebAppInstalls in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in WebRTC in Google Chrome on Linux prior to 148.0.7778.216 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in UI in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)
- 8.8 High severity
Chrome: Use After Free
Use after free in Glic in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
- 8.3 High severity
Chrome: Use After Free
Use after free in WebGL in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)