Common Weakness Enumeration
CWE-416
AllowedUse After Free
Abstraction: Variant · Status: Stable
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10887 vulnerabilities reference this CWE, most recent first.
CVE-2026-42530 (GCVE-0-2026-42530)
Vulnerability from cvelistv5 – Published: 2026-06-17 14:04 – Updated: 2026-07-16 12:04 X_F5
VLAI
EPSS
VEX
Title
NGINX Open-Source ngx_http_v3_module vulnerability
Summary
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 to reopen a QPACK encoder stream. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000161616 | vendor-advisory |
| https://access.redhat.com/security/cve/CVE-2026-42530 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2489872 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:20351 | vendor-advisoryx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | NGINX Open Source |
Affected:
1.31.0 , < 1.31.2
(custom)
|
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
1.30.2-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Lightspeed proxy 1 |
cpe:/a:redhat:insights_proxy:1
|
Date Public
2026-06-17 14:00
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CVE-2026-42007 (GCVE-0-2026-42007)
Vulnerability from cvelistv5 – Published: 2026-08-28 10:12 – Updated: 2026-08-28 15:54
VLAI
EPSS
VEX
Summary
An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffer into the delivered mail. This causes memory leak and opportunity to do memory corruption during mail delivery, which can crash the delivery process and may allow execution of arbitrary code in the context of that process. Disable the Sieve editheader extension. Update to non-vulnerable version. No publicly available exploits are known.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 14:32 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://documentation.open-xchange.com/dovecot/se… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro |
Affected:
2.3.0 , < 2.3.22.2
(semver)
Affected: 3.0.0 , < 3.0.7 (semver) Affected: 3.1.0 , < 3.1.6 (semver) |
|
| Open-Xchange GmbH | OX Dovecot CE |
Affected:
2.3.0 , < 2.4.5
(semver)
|
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CVE-2026-41982 (GCVE-0-2026-41982)
Vulnerability from cvelistv5 – Published: 2026-06-09 07:14 – Updated: 2026-06-09 12:55
VLAI
EPSS
VEX
Summary
Race condition vulnerability in the IPC module. Impact: Successful exploitation of this vulnerability may affect availability.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 12:54 UTC
CWE
- CWE-416 - Use after free
Assigner
References
Impacted products
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CVE-2026-41401 (GCVE-0-2026-41401)
Vulnerability from cvelistv5 – Published: 2026-05-26 14:08 – Updated: 2026-05-26 17:58
VLAI
EPSS
VEX
Title
libyang - Heap Use-After-Free Write in XML Metadata Parsing
Summary
libyang before 5.2.6 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that incorrectly updates metadata list pointers when freeing non-head default metadata entries. Attackers can trigger this vulnerability by submitting crafted YANG XML documents with specific metadata attributes to applications parsing untrusted XML data, causing process crashes or potential code execution.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 17:57 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/CESNET/libyang/security/adviso… | vendor-advisory |
| https://github.com/CESNET/libyang/commit/6b5ed47e… | patch |
| https://red.anthropic.com/2026/cvd/findings/ANT-2… | third-party-advisory |
| https://www.vulncheck.com/advisories/libyang-heap… | third-party-advisory |
Impacted products
Date Public
2026-03-26 00:00
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CVE-2026-41218 (GCVE-0-2026-41218)
Vulnerability from cvelistv5 – Published: 2026-05-13 14:12 – Updated: 2026-05-13 16:14
VLAI
EPSS
VEX
Title
BIG-IP PEM iRules vulnerability
Summary
When BIG-IP PEM iRules are configured on a virtual server (iRules using commands starting with CLASSIFICATION::, CLASSIFY::, PEM::, PSC::, and the urlcatquery command), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 15:59 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000160875 | vendor-advisorypatch |
Impacted products
Date Public
2026-05-13 14:00
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CVE-2026-41158 (GCVE-0-2026-41158)
Vulnerability from cvelistv5 – Published: 2026-06-12 21:57 – Updated: 2026-06-15 19:26
VLAI
EPSS
VEX
Title
GPU DDK - Backed sparse PMRs are not handled by deferred free mechanism after shrink
Summary
Software installed and run as a non-privileged user may conduct GPU system calls to write to arbitrary freed physical pages.
Physical memory allocated and freed, without the deferred free mechanism can lead to those resources being used for read/write by the GPU after the kernel module has freed the resource.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-15 18:50 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Imagination Technologies | Graphics DDK |
Unaffected:
1.18 RTM
(custom)
Unaffected: 23.2 RTM (custom) Unaffected: 24.2 RTM (custom) Affected: 25.1 RTM , ≤ 25.3 RTM (custom) Affected: 26.1 RTM (custom) Unaffected: 26.2 RTM (custom) |
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CVE-2026-41156 (GCVE-0-2026-41156)
Vulnerability from cvelistv5 – Published: 2026-06-19 09:28 – Updated: 2026-06-22 18:23
VLAI
EPSS
VEX
Title
GPU DDK - kernel<->fw CCB contains SYNC_PRIMITIVE_BLOCK firmware address without holding reference
Summary
Software installed and run as a non-privileged user may conduct improper GPU system calls to cause mismanagement of resources creating a write use after free scenario.
A shared resource (memory page) managed by a CPU thread of control (driver) and accessed by a GPU thread of control (Firmware) can cause a write UAF when the CPU thread frees the resource before the GPU FW has finished accessing it.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 18:23 UTC
CWE
- CWE-416 - Use After Free (4.15)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Imagination Technologies | Graphics DDK |
Affected:
1.18 RTM
(custom)
Affected: 23.2 RTM (custom) Affected: 24.2 RTM (custom) Affected: 25.1 RTM , ≤ 25.3 RTM (custom) Affected: 26.1 RTM (custom) Unaffected: 26.2 RTM (custom) |
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CVE-2026-41095 (GCVE-0-2026-41095)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-08-10 15:13
VLAI
EPSS
VEX
Title
Data Deduplication Elevation of Privilege Vulnerability
Summary
Use after free in Data Deduplication allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23181
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23181
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9140
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9140
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.8755
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.8755
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5139
(custom)
|
|
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) |
Affected:
10.0.25398.0 , < 10.0.25398.2330
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.32860
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.32860
(custom)
|
Date Public
2026-05-12 14:00
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CVE-2026-40701 (GCVE-0-2026-40701)
Vulnerability from cvelistv5 – Published: 2026-05-13 14:12 – Updated: 2026-05-13 16:07
VLAI
EPSS
VEX
Title
NGINX ngx_http_ssl_module vulnerability
Summary
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 15:55 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000161021 | vendor-advisorypatch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | NGINX Plus |
Unaffected:
R37 , < *
(custom)
Affected: R36 , < R36 P4 (custom) Affected: R32 , < R32 P6 (custom) |
|
| F5 | NGINX Open Source |
Unaffected:
1.31.0 , < *
(semver)
Affected: 1.19.0 , < 1.30.1 (semver) |
Date Public
2026-05-13 14:00
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CVE-2026-40467 (GCVE-0-2026-40467)
Vulnerability from cvelistv5 – Published: 2026-07-13 12:07 – Updated: 2026-07-13 13:02 X_Open Source
VLAI
EPSS
VEX
Title
Use after free in gawk
Summary
Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-13 13:02 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://cgit.git.savannah.gnu.org/cgit/gawk.git/c… | patch |
| https://cert.pl/en/posts/2026/07/CVE-2026-40467 | third-party-advisory |
Date Public
2026-07-13 12:07
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Mitigation
Architecture and Design
Strategy: Language Selection
Choose a language that provides automatic memory management.
Mitigation
Implementation
Strategy: Attack Surface Reduction
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.
No CAPEC attack patterns related to this CWE.