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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
10829 vulnerabilities reference this CWE, most recent first.
CVE-2026-56131 (GCVE-0-2026-56131)
Vulnerability from cvelistv5 – Published: 2026-06-19 02:56 – Updated: 2026-06-22 14:58
VLAI
EPSS
VEX
Summary
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from within handlers in cases of a policy violation. Thus, a use-after-free can occur (similar to the CVE-2026-50219 situation).
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 14:58 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| libexpat project | libexpat |
Affected:
0 , < 2.8.2
(semver)
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* |
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CVE-2026-56117 (GCVE-0-2026-56117)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:14 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
dhcpcd Heap Use-After-Free via Control Socket Handling
Summary
dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separation is disabled. Attackers can connect to the control socket and send a privileged command such as -x, causing control_recvdata() to free the client object while the same READ+HANGUP event subsequently reaches control_hangup() with the stale pointer, resulting in a use-after-free condition exploitable in deployments using --disable-privsep or where privsep initialization has failed with the control socket operating in mode 0666.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 13:43 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/NetworkConfiguration/dhcpcd/co… | patch |
| https://www.vulncheck.com/advisories/dhcpcd-heap-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NetworkConfiguration | dhcpcd |
Affected:
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(semver)
Unaffected: 78ea09ed1633a583dbcde6e7bab9df4639ec8a34 (git) cpe:2.3:a:dhcpcd_project:dhcpcd:*:*:*:*:*:*:*:* |
Date Public
2026-06-22 00:00
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CVE-2026-56113 (GCVE-0-2026-56113)
Vulnerability from cvelistv5 – Published: 2026-06-23 16:05 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
dhcpcd Heap Use-After-Free in dhcp6_deprecateaddrs via DHCPv6 RENEW
Summary
dhcpcd through 10.3.2, fixed in commit 5733d3c, contains a heap use-after-free vulnerability that allows unauthenticated same-link attackers to crash the daemon by sending a crafted DHCPv6 RENEW reply with RFC6603 OPTION_PD_EXCLUDE and both preferred and valid lifetimes set to zero. Attackers acting as or impersonating a DHCPv6 server can trigger dhcp6_deprecatedele() to free a delegated child address while an outer TAILQ_FOREACH_SAFE iterator in dhcp6_deprecateaddrs() still holds the freed pointer, causing a use-after-free when TAILQ_REMOVE is reached.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 17:58 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/NetworkConfiguration/dhcpcd/co… | patch |
| https://www.vulncheck.com/advisories/dhcpcd-heap-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NetworkConfiguration | dhcpcd |
Affected:
0 , ≤ 10.3.2
(semver)
Unaffected: 5733d3c59a5651f64357ac11c98b4f39895c8d25 (git) cpe:2.3:a:dhcpcd_project:dhcpcd:*:*:*:*:*:*:*:* |
Date Public
2026-06-22 00:00
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CVE-2026-56000 (GCVE-0-2026-56000)
Vulnerability from cvelistv5 – Published: 2026-07-08 07:36 – Updated: 2026-07-08 12:42
VLAI
EPSS
VEX
Title
xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()
Summary
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 12:41 UTC
CWE
- CWE-416 - Use after free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/xserver/-/com… | patch |
| https://www.openwall.com/lists/oss-security/2026/… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| X.Org | xorg-x11-server |
Affected:
0 , < 21.1.24
(rpm)
|
|
| X.Org | xwayland |
Affected:
0 , < 24.1.13
(rpmver)
|
Date Public
2026-07-08 07:30
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CVE-2026-55948 (GCVE-0-2026-55948)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-09-09 19:35
VLAI
EPSS
VEX
Title
Microsoft Excel Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 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
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5561.1001
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Office Online Server |
Affected:
16.0.0.0 , < 16.0.10417.20175
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-55510 (GCVE-0-2026-55510)
Vulnerability from cvelistv5 – Published: 2026-07-01 18:53 – Updated: 2026-07-01 19:21
VLAI
EPSS
VEX
Title
ImageMagick: Use-After-Free in crafted 8BIM when identifying an image
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-51 and 7.1.2-26, when identifying an image with a crafted 8BIM profile with a specific format string a use-after-free will occur. This issue has been fixed in versions 6.9.13-51 and 7.1.2-26.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 19:21 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ImageMagick/ImageMagick/securi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ImageMagick | ImageMagick |
Affected:
>= 7.0.1-0, < 7.1.2-26
Affected: < 6.9.13-51 |
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CVE-2026-55406 (GCVE-0-2026-55406)
Vulnerability from cvelistv5 – Published: 2026-07-16 15:54 – Updated: 2026-07-16 16:47
VLAI
EPSS
VEX
Title
Buffa: Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref
Summary
Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView<V> type allowed safe Rust code to trigger a use-after-free: the OwnedView::decode constructor transmuted a borrowed slice to &'static [u8], and the Deref implementation exposed the promoted 'static lifetime on borrowed view fields (such as &'static str and &'static [u8]) to callers, so the borrow checker permitted those references to outlive the OwnedView; once the OwnedView was dropped and its backing buffer freed, the references became dangling, enabling memory corruption, information disclosure of freed heap contents, and cross-thread misuse without any unsafe code in the calling application. This issue is fixed in version 0.7.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-16 16:47 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/anthropics/buffa/security/advi… | x_refsource_CONFIRM |
| https://github.com/anthropics/buffa/pull/154 | x_refsource_MISC |
| https://github.com/anthropics/buffa/commit/7dcf50… | x_refsource_MISC |
| https://github.com/anthropics/buffa/releases/tag/v0.7.0 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| anthropics | buffa |
Affected:
< 0.7.0
|
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"title": "Buffa: Use-After-Free in OwnedView via Unsound \u0027static Lifetime Promotion in Deref"
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CVE-2026-55128 (GCVE-0-2026-55128)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:09 – Updated: 2026-09-09 19:39
VLAI
EPSS
VEX
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 03:57 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5561.1001
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20175
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19725.20434
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5561.1000
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-55032 (GCVE-0-2026-55032)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:08 – Updated: 2026-09-09 19:39
VLAI
EPSS
VEX
Title
Microsoft Word Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 03:57 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
11 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5561.1001
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20175
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19725.20434
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5561.1000
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-55018 (GCVE-0-2026-55018)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:08 – Updated: 2026-09-09 19:39
VLAI
EPSS
VEX
Title
Microsoft Office Remote Code Execution Vulnerability
Summary
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 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
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5561.1000
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 365 for Mac |
Affected:
1.0.0 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.111.26071215
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.111.26071215
(custom)
|
Date Public
2026-07-14 14:00
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"containers": {
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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.