Common Weakness Enumeration

CWE-416

Allowed

Use After Free

Abstraction: Variant · Status: Stable

API response cwe.mitre.org

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

9823 vulnerabilities reference this CWE, most recent first.

GHSA-QVH7-J2X6-25X5

Vulnerability from github – Published: 2022-05-02 03:46 – Updated: 2024-02-02 18:30
VLAI
Details

Use-after-free vulnerability in the abstract file-descriptor handling interface in the cupsdDoSelect function in scheduler/select.c in the scheduler in cupsd in CUPS 1.3.7 and 1.3.10 allows remote attackers to cause a denial of service (daemon crash or hang) via a client disconnection during listing of a large number of print jobs, related to improperly maintaining a reference count. NOTE: some of these details are obtained from third party information.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2009-3553"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2009-11-20T02:30:00Z",
    "severity": "MODERATE"
  },
  "details": "Use-after-free vulnerability in the abstract file-descriptor handling interface in the cupsdDoSelect function in scheduler/select.c in the scheduler in cupsd in CUPS 1.3.7 and 1.3.10 allows remote attackers to cause a denial of service (daemon crash or hang) via a client disconnection during listing of a large number of print jobs, related to improperly maintaining a reference count.  NOTE: some of these details are obtained from third party information.",
  "id": "GHSA-qvh7-j2x6-25x5",
  "modified": "2024-02-02T18:30:21Z",
  "published": "2022-05-02T03:46:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-3553"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2009:1595"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2009-3553"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=530111"
    },
    {
      "type": "WEB",
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11183"
    },
    {
      "type": "WEB",
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00332.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.apple.com/archives/security-announce/2010/Jan/msg00000.html"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/37360"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/37364"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/38241"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/43521"
    },
    {
      "type": "WEB",
      "url": "http://security.gentoo.org/glsa/glsa-201207-10.xml"
    },
    {
      "type": "WEB",
      "url": "http://sunsolve.sun.com/search/document.do?assetkey=1-66-275230-1"
    },
    {
      "type": "WEB",
      "url": "http://support.apple.com/kb/HT4004"
    },
    {
      "type": "WEB",
      "url": "http://www.cups.org/newsgroups.php/newsgroups.php?v5994+gcups.bugs"
    },
    {
      "type": "WEB",
      "url": "http://www.cups.org/newsgroups.php/newsgroups.php?v5996+gcups.bugs"
    },
    {
      "type": "WEB",
      "url": "http://www.cups.org/newsgroups.php/newsgroups.php?v6055+gcups.bugs"
    },
    {
      "type": "WEB",
      "url": "http://www.cups.org/str.php?L3200"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2011/dsa-2176"
    },
    {
      "type": "WEB",
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2010:073"
    },
    {
      "type": "WEB",
      "url": "http://www.redhat.com/support/errata/RHSA-2009-1595.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/37048"
    },
    {
      "type": "WEB",
      "url": "http://www.ubuntu.com/usn/USN-906-1"
    },
    {
      "type": "WEB",
      "url": "http://www.vupen.com/english/advisories/2010/0173"
    },
    {
      "type": "WEB",
      "url": "http://www.vupen.com/english/advisories/2011/0535"
    }
  ],
  "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:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QVM5-4FH7-HCFX

Vulnerability from github – Published: 2022-02-11 00:01 – Updated: 2023-01-19 18:30
VLAI
Details

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2021-4154"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-02-04T23:15:00Z",
    "severity": "HIGH"
  },
  "details": "A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel\u0027s cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.",
  "id": "GHSA-qvm5-4fh7-hcfx",
  "modified": "2023-01-19T18:30:27Z",
  "published": "2022-02-11T00:01:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4154"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2034514"
    },
    {
      "type": "WEB",
      "url": "https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975b"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220225-0004"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QVPW-WR9P-GH42

Vulnerability from github – Published: 2022-11-02 12:00 – Updated: 2022-11-02 19:00
VLAI
Details

Use after free in import in Google Chrome prior to 106.0.5249.62 allowed a remote attacker who had compromised a WebUI process to potentially perform a sandbox escape via a crafted HTML page. (Chrome security severity: Medium)

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-3311"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-01T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Use after free in import in Google Chrome prior to 106.0.5249.62 allowed a remote attacker who had compromised a WebUI process to potentially perform a sandbox escape via a crafted HTML page. (Chrome security severity: Medium)",
  "id": "GHSA-qvpw-wr9p-gh42",
  "modified": "2022-11-02T19:00:25Z",
  "published": "2022-11-02T12:00:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3311"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2022/09/stable-channel-update-for-desktop_27.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/1302813"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QVR4-HGXW-V9XJ

Vulnerability from github – Published: 2023-11-21 15:30 – Updated: 2023-11-28 21:30
VLAI
Details

Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox < 120, Firefox < 115.5, and Thunderbird < 115.5.0.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-6207"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-11-21T15:15:07Z",
    "severity": "HIGH"
  },
  "details": "Ownership mismanagement led to a use-after-free in ReadableByteStreams This vulnerability affects Firefox \u003c 120, Firefox \u003c 115.5, and Thunderbird \u003c 115.5.0.",
  "id": "GHSA-qvr4-hgxw-v9xj",
  "modified": "2023-11-28T21:30:24Z",
  "published": "2023-11-21T15:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-6207"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1861344"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5561"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2023-49"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2023-50"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2023-52"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QVRX-992Q-W36H

Vulnerability from github – Published: 2022-05-13 01:06 – Updated: 2022-05-13 01:06
VLAI
Details

Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC Classic before 2015.006.30060, and Acrobat and Acrobat Reader DC Continuous before 2015.008.20082 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-5095, CVE-2015-5099, CVE-2015-5101, CVE-2015-5111, CVE-2015-5113, and CVE-2015-5114.

Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2015-4448"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2015-07-15T14:59:00Z",
    "severity": "HIGH"
  },
  "details": "Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC Classic before 2015.006.30060, and Acrobat and Acrobat Reader DC Continuous before 2015.008.20082 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-5095, CVE-2015-5099, CVE-2015-5101, CVE-2015-5111, CVE-2015-5113, and CVE-2015-5114.",
  "id": "GHSA-qvrx-992q-w36h",
  "modified": "2022-05-13T01:06:49Z",
  "published": "2022-05-13T01:06:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-4448"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/reader/apsb15-15.html"
    },
    {
      "type": "WEB",
      "url": "https://www.verisign.com/en_US/security-services/security-intelligence/vulnerability-reports/articles/index.xhtml?id=1201"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/75739"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1032892"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-QVXQ-66F5-6M6G

Vulnerability from github – Published: 2023-05-21 21:30 – Updated: 2024-03-25 03:31
VLAI
Details

The Linux kernel 6.3 has a use-after-free in iopt_unmap_iova_range in drivers/iommu/iommufd/io_pagetable.c.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2023-33250"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-05-21T21:15:08Z",
    "severity": "MODERATE"
  },
  "details": "The Linux kernel 6.3 has a use-after-free in iopt_unmap_iova_range in drivers/iommu/iommufd/io_pagetable.c.",
  "id": "GHSA-qvxq-66f5-6m6g",
  "modified": "2024-03-25T03:31:43Z",
  "published": "2023-05-21T21:30:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-33250"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1211597"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=804ca14d04df09bf7924bacc5ad22a4bed80c94f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dbe245cdf5189e88d680379ed13901356628b650"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/syzkaller/c/G6P9yecsTZ8/m/iiqFVOM9BwAJ"
    },
    {
      "type": "WEB",
      "url": "https://lore.kernel.org/linux-iommu/ZDabT%2FuRl%2FjxFhm0%40ip-172-31-85-199.ec2.internal/T"
    },
    {
      "type": "WEB",
      "url": "https://lore.kernel.org/linux-iommu/ZDabT%2FuRl%2FjxFhm0@ip-172-31-85-199.ec2.internal/T"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230622-0006"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QW22-H529-V4JH

Vulnerability from github – Published: 2025-07-08 18:31 – Updated: 2025-07-08 18:31
VLAI
Details

Use after free in Kernel Streaming WOW Thunk Service Driver allows an authorized attacker to elevate privileges locally.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-49675"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-08T17:15:51Z",
    "severity": "HIGH"
  },
  "details": "Use after free in Kernel Streaming WOW Thunk Service Driver allows an authorized attacker to elevate privileges locally.",
  "id": "GHSA-qw22-h529-v4jh",
  "modified": "2025-07-08T18:31:47Z",
  "published": "2025-07-08T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49675"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49675"
    }
  ],
  "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"
    }
  ]
}

GHSA-QW35-VHHW-R5PP

Vulnerability from github – Published: 2022-10-15 12:01 – Updated: 2022-10-15 12:01
VLAI
Details

Adobe Dimension versions 3.4.5 is affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-38446"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-10-14T20:15:00Z",
    "severity": "HIGH"
  },
  "details": "Adobe Dimension versions 3.4.5 is affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.",
  "id": "GHSA-qw35-vhhw-r5pp",
  "modified": "2022-10-15T12:01:01Z",
  "published": "2022-10-15T12:01:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-38446"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/dimension/apsb22-57.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-QW38-PPMM-FJPW

Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2024-10-25 21:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

perf: Fix perf_pending_task() UaF

Per syzbot it is possible for perf_pending_task() to run after the event is free()'d. There are two related but distinct cases:

  • the task_work was already queued before destroying the event;
  • destroying the event itself queues the task_work.

The first cannot be solved using task_work_cancel() since perf_release() itself might be called from a task_work (____fput), which means the current->task_works list is already empty and task_work_cancel() won't be able to find the perf_pending_task() entry.

The simplest alternative is extending the perf_event lifetime to cover the task_work.

The second is just silly, queueing a task_work while you know the event is going away makes no sense and is easily avoided by re-arranging how the event is marked STATE_DEAD and ensuring it goes through STATE_OFF on the way down.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-48950"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:06Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix perf_pending_task() UaF\n\nPer syzbot it is possible for perf_pending_task() to run after the\nevent is free()\u0027d. There are two related but distinct cases:\n\n - the task_work was already queued before destroying the event;\n - destroying the event itself queues the task_work.\n\nThe first cannot be solved using task_work_cancel() since\nperf_release() itself might be called from a task_work (____fput),\nwhich means the current-\u003etask_works list is already empty and\ntask_work_cancel() won\u0027t be able to find the perf_pending_task()\nentry.\n\nThe simplest alternative is extending the perf_event lifetime to cover\nthe task_work.\n\nThe second is just silly, queueing a task_work while you know the\nevent is going away makes no sense and is easily avoided by\nre-arranging how the event is marked STATE_DEAD and ensuring it goes\nthrough STATE_OFF on the way down.",
  "id": "GHSA-qw38-ppmm-fjpw",
  "modified": "2024-10-25T21:31:26Z",
  "published": "2024-10-21T21:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48950"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59"
    }
  ],
  "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"
    }
  ]
}

GHSA-QW4M-2PV2-7R5F

Vulnerability from github – Published: 2023-09-12 21:30 – Updated: 2025-02-13 18:31
VLAI
Details

A use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.

When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue().

We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-4921"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-12T20:15:10Z",
    "severity": "HIGH"
  },
  "details": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: sch_qfq component can be exploited to achieve local privilege escalation.\n\nWhen the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue().\n\nWe recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.",
  "id": "GHSA-qw4m-2pv2-7r5f",
  "modified": "2025-02-13T18:31:51Z",
  "published": "2023-09-12T21:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4921"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8fc134fee27f2263988ae38920bc03da416b03d8"
    },
    {
      "type": "WEB",
      "url": "https://kernel.dance/8fc134fee27f2263988ae38920bc03da416b03d8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"
    }
  ],
  "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
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.

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