Common Weakness Enumeration

CWE-457

Allowed

Use of Uninitialized Variable

Abstraction: Variant · Status: Draft

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

332 vulnerabilities reference this CWE, most recent first.

GHSA-H44X-G8CV-P3QX

Vulnerability from github – Published: 2026-05-29 00:38 – Updated: 2026-05-29 18:31
VLAI
Details

Uninitialized Use in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-9944"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T23:16:52Z",
    "severity": "LOW"
  },
  "details": "Uninitialized Use in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)",
  "id": "GHSA-h44x-g8cv-p3qx",
  "modified": "2026-05-29T18:31:25Z",
  "published": "2026-05-29T00:38:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9944"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html"
    },
    {
      "type": "WEB",
      "url": "https://issues.chromium.org/issues/503471286"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-H6X7-66P5-F6G7

Vulnerability from github – Published: 2025-06-11 18:35 – Updated: 2025-06-11 18:35
VLAI
Details

The iSTAR Configuration Utility (ICU) tool leaks memory, which could result in the unintended exposure of unauthorized data from the Windows PC that ICU is running on.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-26383"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-11T16:15:23Z",
    "severity": "MODERATE"
  },
  "details": "The iSTAR Configuration Utility (ICU) tool leaks memory, which could result in the unintended exposure of unauthorized data from the Windows PC that ICU is running on.",
  "id": "GHSA-h6x7-66p5-f6g7",
  "modified": "2025-06-11T18:35:43Z",
  "published": "2025-06-11T18:35:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-26383"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-146-01"
    },
    {
      "type": "WEB",
      "url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-HCJJ-C5XX-HV34

Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 03:35
VLAI
Details

Uninitialized Use in CSS in Google Chrome on Android prior to 150.0.7871.47 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-13943"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-30T23:17:08Z",
    "severity": "MODERATE"
  },
  "details": "Uninitialized Use in CSS in Google Chrome on Android prior to 150.0.7871.47 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)",
  "id": "GHSA-hcjj-c5xx-hv34",
  "modified": "2026-07-01T03:35:22Z",
  "published": "2026-07-01T00:34:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13943"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352312.html"
    },
    {
      "type": "WEB",
      "url": "https://issues.chromium.org/issues/513204116"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HH5J-34R6-5293

Vulnerability from github – Published: 2026-08-13 21:36 – Updated: 2026-08-13 21:36
VLAI
Details

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.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-17077"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T21:17:41Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-hh5j-34r6-5293",
  "modified": "2026-08-13T21:36:12Z",
  "published": "2026-08-13T21:36:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17077"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7283572"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HHCC-XJ56-GMQC

Vulnerability from github – Published: 2026-08-25 21:31 – Updated: 2026-08-26 18:31
VLAI
Details

Use of uninitialized variable in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-78935"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T21:17:49Z",
    "severity": "CRITICAL"
  },
  "details": "Use of uninitialized variable in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)",
  "id": "GHSA-hhcc-xj56-gmqc",
  "modified": "2026-08-26T18:31:36Z",
  "published": "2026-08-25T21:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78935"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"
    },
    {
      "type": "WEB",
      "url": "https://issues.chromium.org/issues/522082472"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HM47-8PG5-GPCJ

Vulnerability from github – Published: 2026-06-05 00:31 – Updated: 2026-06-08 18:31
VLAI
Details

Uninitialized Use in ANGLE in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-11123"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-04T23:17:18Z",
    "severity": "MODERATE"
  },
  "details": "Uninitialized Use in ANGLE in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)",
  "id": "GHSA-hm47-8pg5-gpcj",
  "modified": "2026-06-08T18:31:44Z",
  "published": "2026-06-05T00:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11123"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html"
    },
    {
      "type": "WEB",
      "url": "https://issues.chromium.org/issues/501505198"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HPR4-88JH-4PVX

Vulnerability from github – Published: 2026-07-22 15:31 – Updated: 2026-07-22 15:31
VLAI
Details

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').

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-55990"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-22T14:17:21Z",
    "severity": "MODERATE"
  },
  "details": "In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when the \u0027dnscrypt:\u0027 clause lists more \u0027dnscrypt-provider-cert:\u0027 files than there are matching \u0027dnscrypt-secret-key:\u0027 files, Unbound fills only the matched prefix and leaves the tail slots at the \u00270xdb\u0027 fill that libsodium\u0027s 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 \u00270xdb\u0027 bytes. Any unauthenticated client that sends one UDP datagram of \u2265 68 bytes whose first 8 bytes are \u00270xdb\u0027 to \u0027dnscrypt-port\u0027 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 (\u0027--enable-dnscrypt\u0027).",
  "id": "GHSA-hpr4-88jh-4pvx",
  "modified": "2026-07-22T15:31:25Z",
  "published": "2026-07-22T15:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55990"
    },
    {
      "type": "WEB",
      "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-55990.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HWJJ-G6G7-P8CF

Vulnerability from github – Published: 2026-02-24 15:30 – Updated: 2026-02-25 21:31
VLAI
Details

Uninitialized memory in the Graphics: Text component. This vulnerability affects Firefox < 148.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-2806"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457",
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-24T14:16:29Z",
    "severity": "CRITICAL"
  },
  "details": "Uninitialized memory in the Graphics: Text component. This vulnerability affects Firefox \u003c 148.",
  "id": "GHSA-hwjj-g6g7-p8cf",
  "modified": "2026-02-25T21:31:18Z",
  "published": "2026-02-24T15:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2806"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2006199"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-13"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-16"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HWMF-9WJ8-35PW

Vulnerability from github – Published: 2026-06-03 21:30 – Updated: 2026-06-04 15:30
VLAI
Details

libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-26824"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-03T20:16:18Z",
    "severity": "MODERATE"
  },
  "details": "libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file",
  "id": "GHSA-hwmf-9wj8-35pw",
  "modified": "2026-06-04T15:30:33Z",
  "published": "2026-06-03T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26824"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libxls/libxls/issues/155"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-HXFW-5P57-PW36

Vulnerability from github – Published: 2025-12-11 21:31 – Updated: 2025-12-15 21:30
VLAI
Details

In trusty_ffa_mem_reclaim of shared-mem-smcall.c, there is a possible memory corruption due to uninitialized data. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-36935"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-457",
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-11T20:15:58Z",
    "severity": "HIGH"
  },
  "details": "In trusty_ffa_mem_reclaim of shared-mem-smcall.c, there is a possible memory corruption due to uninitialized data. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.",
  "id": "GHSA-hxfw-5p57-pw36",
  "modified": "2025-12-15T21:30:29Z",
  "published": "2025-12-11T21:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-36935"
    },
    {
      "type": "WEB",
      "url": "https://source.android.com/security/bulletin/pixel/2025-12-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.