Common Weakness Enumeration

CWE-457

Allowed

Use of Uninitialized Variable

Abstraction: Variant · Status: Draft

API response cwe.mitre.org

The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

328 vulnerabilities reference this CWE, most recent first.

CVE-2026-55990 (GCVE-0-2026-55990)

Vulnerability from cvelistv5 – Published: 2026-07-22 13:10 – Updated: 2026-07-22 14:04
VLAI
Title
Packet of death for a DNSCrypt misconfigured Unbound
Summary
In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when the 'dnscrypt:' clause lists more 'dnscrypt-provider-cert:' files than there are matching 'dnscrypt-secret-key:' files, Unbound fills only the matched prefix and leaves the tail slots at the '0xdb' fill that libsodium's allocator writes into every allocation. Unbound would then iterate over the number of cert files, not the actual slots, so it walks into a slot with garbage data filled with '0xdb' bytes. Any unauthenticated client that sends one UDP datagram of ≥ 68 bytes whose first 8 bytes are '0xdb' to 'dnscrypt-port' will use that garbage entry which leads to a garbage dereference killing the server. This is a silent faulty configuration that goes unnoticed until triggered with the right client query. Unbound needs to be compiled with DNSCrypt support ('--enable-dnscrypt').
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 14:04 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
Vendor Product Version
NLnet Labs Unbound Affected: 1.7.0 , < 1.25.2 (semver)
Create a notification for this product.
Date Public
2026-07-22 00:00
Credits
Qifan Zhang (Palo Alto Networks)
Show details on NVD website
To clipboard 

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CVE-2026-47336 (GCVE-0-2026-47336)

Vulnerability from cvelistv5 – Published: 2026-05-28 18:29 – Updated: 2026-05-28 19:23
VLAI
Title
Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules
Summary
Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/AF_INET6 socket mediation code. The bug can be triggered by an unprivileged local user and could result in incorrect fine-grained mediation of network sockets.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 19:21 UTC
CWE
  • CWE-457 - Use of uninitialized variable
Assigner
References
Impacted products
Vendor Product Version
Canonical Ubuntu Linux Affected: 6.8.0 , < 6.8.0-124.124 (dpkg)
Create a notification for this product.
Credits
Tristan Madani (@TristanInSec), Talence Security
Show details on NVD website
To clipboard 

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CVE-2026-47330 (GCVE-0-2026-47330)

Vulnerability from cvelistv5 – Published: 2026-05-28 18:27 – Updated: 2026-05-28 19:24
VLAI
Title
Use of uninitialized value in Ubuntu Linux AppArmor notification handling
Summary
Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an uninitialized variable in notification handling code. The bug can be triggered by an unprivileged local user and can result in the incorrect caching of AppArmor notification responses.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 19:19 UTC
CWE
  • CWE-457 - Use of uninitialized variable
Assigner
References
Impacted products
Vendor Product Version
Canonical Ubuntu Linux Affected: 6.8.0 , < 6.8.0-124.124 (dpkg)
Affected: 6.17.0 , < 6.17.0-35.35 (dpkg)
Affected: 7.0.0 , < 7.0.0-22.22 (dpkg)
Create a notification for this product.
Credits
Tristan Madani (@TristanInSec), Talence Security
Show details on NVD website
To clipboard 

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CVE-2026-34608 (GCVE-0-2026-34608)

Vulnerability from cvelistv5 – Published: 2026-04-02 17:52 – Updated: 2026-04-02 19:10
VLAI
Title
nanomq: Heap-Buffer-Overflow in webhook_inproc.c via cJSON_Parse OOB Read
Summary
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.10, in NanoMQ's webhook_inproc.c, the hook_work_cb() function processes nng messages by parsing the message body with cJSON_Parse(body). The body is obtained from nng_msg_body(msg), which is a binary buffer without a guaranteed null terminator. This leads to an out-of-bounds read (OOB read) as cJSON_Parse reads until it finds a \0, potentially accessing memory beyond the allocated buffer (e.g., nng_msg metadata or adjacent heap/stack). The issue is often masked by nng's allocation padding (extra 32 bytes of zeros for non-power-of-two sizes <1024 or non-aligned). The overflow is reliably triggered when the JSON payload length is a power-of-two >=1024 (no padding added). This issue has been patched in version 0.24.10.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 19:10 UTC
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
Vendor Product Version
nanomq nanomq Affected: < 0.24.10
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-22188 (GCVE-0-2026-22188)

Vulnerability from cvelistv5 – Published: 2026-01-07 20:26 – Updated: 2026-07-14 15:53
VLAI
Title
Panda3D <= 1.10.16 Deploy-Stub Stack Exhaustion via Unbounded alloca()
Summary
The deploy-stub component in Panda3D versions up to and including 1.10.16 contains a denial of service vulnerability due to unbounded stack allocation. The deploy-stub executable allocates argv_copy and argv_copy2 using alloca() based directly on the attacker-controlled argc value without validation. Supplying a large number of command-line arguments can exhaust stack space and propagate uninitialized stack memory into Python interpreter initialization, resulting in a reliable crash and undefined behavior.
Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 21:23 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Vendor Product Version
Panda3D Panda3D Affected: 0 , ≤ 1.10.16 (semver)
    cpe:2.3:a:cmu:panda3d:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Ron Edgerson
Show details on NVD website
To clipboard 

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CVE-2026-21690 (GCVE-0-2026-21690)

Vulnerability from cvelistv5 – Published: 2026-01-07 21:50 – Updated: 2026-01-08 14:44
VLAI
Title
iccDEV has Type Confusion in CIccTagXmlTagData::ToXml()
Summary
iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. Versions prior to 2.3.1.2 have a Type Confusion vulnerability in `CIccTagXmlTagData::ToXml()`. This vulnerability affects users of the iccDEV library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.
Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 14:42 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-457 - Use of Uninitialized Variable
  • CWE-475 - Undefined Behavior for Input to API
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-20051 (GCVE-0-2026-20051)

Vulnerability from cvelistv5 – Published: 2026-02-25 16:14 – Updated: 2026-02-25 19:05
VLAI
Title
Cisco Nexus 3600-R and 9500-R Series Switching Platforms Layer 2 Loop Denial of Service Vulnerability
Summary
A vulnerability with the Ethernet VPN (EVPN) Layer 2 ingress packet processing of Cisco Nexus 3600 Platform Switches and Cisco Nexus 9500-R Series Switching Platforms could allow an unauthenticated, adjacent attacker to trigger a Layer 2 traffic loop. This vulnerability is due to a logic error when processing a crafted Layer 2 ingress frame. An attacker could exploit this vulnerability by sending a stream of crafted Ethernet frames through the targeted device. A successful exploit could allow the attacker to cause a Layer 2 Virtual eXtensible LAN (VxLAN) traffic loop, which, in turn, could result in a denial of service (DoS) condition. This Layer 2 loop could oversubscribe the bandwidth on network interfaces, which would result in all data plane traffic being dropped. To exploit this vulnerability, the attacker must be Layer 2-adjacent to the affected device. Note:&nbsp;To stop active exploitation of this vulnerability, manual intervention is required to both stop the crafted traffic and flap all involved network interfaces. For additional assistance if a Layer 2 loop that is related to this vulnerability is suspected, contact the Cisco Technical Assistance Center (TAC) or the proper support provider.&nbsp;
Severity
7.4 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-25 18:18 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
Vendor Product Version
Cisco Cisco NX-OS Software Affected: 9.2(3)
Affected: 9.2(2v)
Affected: 9.2(1)
Affected: 9.2(2t)
Affected: 9.2(3y)
Affected: 9.3(2)
Affected: 9.2(4)
Affected: 9.3(1)
Affected: 9.3(1z)
Affected: 9.2(2)
Affected: 9.3(3)
Affected: 9.3(4)
Affected: 9.3(5)
Affected: 9.3(6)
Affected: 9.3(5w)
Affected: 9.3(7)
Affected: 9.3(7k)
Affected: 10.2(1)
Affected: 9.3(7a)
Affected: 9.3(8)
Affected: 10.2(1q)
Affected: 10.2(2)
Affected: 9.3(9)
Affected: 10.2(3)
Affected: 10.2(3t)
Affected: 9.3(10)
Affected: 10.2(2a)
Affected: 10.3(1)
Affected: 10.2(4)
Affected: 10.3(2)
Affected: 9.3(11)
Affected: 10.3(3)
Affected: 10.2(5)
Affected: 9.3(12)
Affected: 10.2(3v)
Affected: 10.4(1)
Affected: 10.2(6)
Affected: 10.3(3w)
Affected: 10.3(3o)
Affected: 10.3(4)
Affected: 10.3(3p)
Affected: 10.3(4a)
Affected: 10.4(2)
Affected: 10.3(3q)
Affected: 9.3(13)
Affected: 10.3(5)
Affected: 10.2(7)
Affected: 10.4(3)
Affected: 10.3(3x)
Affected: 10.3(4g)
Affected: 10.5(1)
Affected: 10.2(8)
Affected: 10.3(3r)
Affected: 10.3(6)
Affected: 9.3(14)
Affected: 10.4(4)
Affected: 10.3(4h)
Affected: 10.5(2)
Affected: 10.3(7)
Affected: 10.4(5)
Affected: 10.5(3)
Affected: 10.2(9)
Affected: 9.3(15)
Affected: 10.4(4g)
Affected: 10.5(4)
Affected: 10.6(1)
Affected: 10.5(3t)
Affected: 10.3(8)
Affected: 10.4(6)
Affected: 10.5(3s)
Affected: 10.5(3e)
Affected: 10.5(3o)
Affected: 9.3(16)
Affected: 10.6(1s)
Affected: 10.5(3p)
Create a notification for this product.
Show details on NVD website
To clipboard 

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              "status": "affected",
              "version": "10.5(1)"
            },
            {
              "status": "affected",
              "version": "10.2(8)"
            },
            {
              "status": "affected",
              "version": "10.3(3r)"
            },
            {
              "status": "affected",
              "version": "10.3(6)"
            },
            {
              "status": "affected",
              "version": "9.3(14)"
            },
            {
              "status": "affected",
              "version": "10.4(4)"
            },
            {
              "status": "affected",
              "version": "10.3(4h)"
            },
            {
              "status": "affected",
              "version": "10.5(2)"
            },
            {
              "status": "affected",
              "version": "10.3(7)"
            },
            {
              "status": "affected",
              "version": "10.4(5)"
            },
            {
              "status": "affected",
              "version": "10.5(3)"
            },
            {
              "status": "affected",
              "version": "10.2(9)"
            },
            {
              "status": "affected",
              "version": "9.3(15)"
            },
            {
              "status": "affected",
              "version": "10.4(4g)"
            },
            {
              "status": "affected",
              "version": "10.5(4)"
            },
            {
              "status": "affected",
              "version": "10.6(1)"
            },
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              "status": "affected",
              "version": "10.5(3t)"
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              "status": "affected",
              "version": "10.5(3e)"
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              "version": "10.5(3o)"
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              "status": "affected",
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        }
      ],
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CVE-2026-19212 (GCVE-0-2026-19212)

Vulnerability from cvelistv5 – Published: 2026-08-07 16:30 – Updated: 2026-08-08 02:58
VLAI
Title
WonderTrader TraderATP Cash Trade Conversion WTSTradeDef.hpp uninitialized variable
Summary
A vulnerability was determined in WonderTrader up to 0.9.9. This impacts an unknown function of the file src/Includes/WTSTradeDef.hpp of the component TraderATP Cash Trade Conversion. Executing a manipulation of the argument m_offsetType can lead to use of uninitialized variable. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
4.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-08 02:58 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
  • CWE-453 - Insecure Default Variable Initialization
Assigner
References
URL Tags
https://vuldb.com/vuln/386957 vdb-entrytechnical-description
https://vuldb.com/vuln/386957/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19212 third-party-advisory
https://vuldb.com/submit/864875 third-party-advisory
https://my.feishu.cn/wiki/PyAuwg8Bwit3TBk5DgLc14G… exploit
Impacted products
Vendor Product Version
n/a WonderTrader Affected: 0.9.0
Affected: 0.9.1
Affected: 0.9.2
Affected: 0.9.3
Affected: 0.9.4
Affected: 0.9.5
Affected: 0.9.6
Affected: 0.9.7
Affected: 0.9.8
Affected: 0.9.9
    cpe:2.3:a:wondertrader:wondertrader:*:*:*:*:*:*:*:*
Credits
sannomiya (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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CVE-2026-17077 (GCVE-0-2026-17077)

Vulnerability from cvelistv5 – Published: 2026-08-13 20:25 – Updated: 2026-08-13 20:25
VLAI
Title
IBM i is Affected By Multiple Vulnerabilities in DRDA / DDM
Summary
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to the use of an uninitialized variable.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7283572 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM i Affected: 7.6
Affected: 7.5
Affected: 7.4
Affected: 7.3
    cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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        }
      ],
      "title": "IBM i is Affected By Multiple Vulnerabilities in DRDA / DDM"
    }
  },
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CVE-2026-15168 (GCVE-0-2026-15168)

Vulnerability from cvelistv5 – Published: 2026-07-08 21:47 – Updated: 2026-07-09 13:54
VLAI
Title
Use of Uninitialized Variable in Wireshark
Summary
BLF file parser in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows possible information disclosure
Severity
2.5 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:53 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.7 (semver)
Affected: 4.4.0 , < 4.4.17 (semver)
Create a notification for this product.
Credits
Thai Duong Tran
Show details on NVD website
To clipboard 

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Mitigation MIT-57
Implementation

Strategy: Attack Surface Reduction

Ensure that critical variables are initialized before first use [REF-1485].

Mitigation
Build and Compilation

Strategy: Compilation or Build Hardening

Most compilers will complain about the use of uninitialized variables if warnings are turned on.

Mitigation
Implementation Operation

When using a language that does not require explicit declaration of variables, run or compile the software in a mode that reports undeclared or unknown variables. This may indicate the presence of a typographic error in the variable's name.

Mitigation
Requirements

Strategy: Language Selection

Choose a language that is not susceptible to these issues.

Mitigation
Architecture and Design

Mitigating technologies such as safe string libraries and container abstractions could be introduced.

No CAPEC attack patterns related to this CWE.

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