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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

9874 vulnerabilities reference this CWE, most recent first.

GHSA-6C7W-P9G8-2J35

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-06-24 18:32
VLAI
Details

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

power: supply: pm8916_lbc: Fix use-after-free in power_supply_changed()

Using the devm_ variant for requesting IRQ before the devm_ variant for allocating/registering the power_supply handle, means that the power_supply handle will be deallocated/unregistered before the interrupt handler (since devm_ naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just after the power_supply handle has been freed, but just before the corresponding unregistration of the IRQ handler has run.

This will lead to the IRQ handler calling power_supply_changed() with a freed power_supply handle. Which usually crashes the system or otherwise silently corrupts the memory...

Note that there is a similar situation which can also happen during probe(); the possibility of an interrupt firing before registering the power_supply handle. This would then lead to the nasty situation of using the power_supply handle uninitialized in power_supply_changed().

Fix this racy use-after-free by making sure the IRQ is requested after the registration of the power_supply handle.

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
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{
  "affected": [],
  "aliases": [
    "CVE-2026-45938"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:09Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: pm8916_lbc: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle.",
  "id": "GHSA-6c7w-p9g8-2j35",
  "modified": "2026-06-24T18:32:28Z",
  "published": "2026-05-27T15:33:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08e674e9862a2db46fb234eb7c5442455ece0131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7508129978ae1e2ed9b0410396abc05def9c4eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7d31fc99d248d5f47588f50dce5c7599c991c6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbe579e620ef0f53db490ec79a8566e4ea8918ac"
    }
  ],
  "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-6C8P-GHF2-886R

Vulnerability from github – Published: 2024-11-15 12:31 – Updated: 2024-11-15 12:31
VLAI
Details

A use after free vulnerability exists in GPAC version 2.3-DEV-revrelease, specifically in the gf_filterpacket_del function in filter_core/filter.c at line 38. This vulnerability can lead to a double-free condition, which may cause the application to crash.

Severity
5.9 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-4679"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-15T11:15:08Z",
    "severity": "MODERATE"
  },
  "details": "A use after free vulnerability exists in GPAC version 2.3-DEV-revrelease, specifically in the gf_filterpacket_del function in filter_core/filter.c at line 38. This vulnerability can lead to a double-free condition, which may cause the application to crash.",
  "id": "GHSA-6c8p-ghf2-886r",
  "modified": "2024-11-15T12:31:45Z",
  "published": "2024-11-15T12:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4679"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gpac/gpac/commit/b68b3f0bf5c366e003221d78fd663a1d5514a876"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/6f721ee7-8785-4c26-801e-f40fed3faaac"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-6C9X-J9R2-VPW8

Vulnerability from github – Published: 2025-07-04 15:31 – Updated: 2026-05-12 15:30
VLAI
Details

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

ipc: fix to protect IPCS lookups using RCU

syzbot reported that it discovered a use-after-free vulnerability, 0

idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read.

Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().

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-2025-38212"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-04T14:15:29Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipc: fix to protect IPCS lookups using RCU\n\nsyzbot reported that it discovered a use-after-free vulnerability, [0]\n\n[0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/\n\nidr_for_each() is protected by rwsem, but this is not enough.  If it is\nnot protected by RCU read-critical region, when idr_for_each() calls\nradix_tree_node_free() through call_rcu() to free the radix_tree_node\nstructure, the node will be freed immediately, and when reading the next\nnode in radix_tree_for_each_slot(), the already freed memory may be read.\n\nTherefore, we need to add code to make sure that idr_for_each() is\nprotected within the RCU read-critical region when we call it in\nshm_destroy_orphaned().",
  "id": "GHSA-6c9x-j9r2-vpw8",
  "modified": "2026-05-12T15:30:54Z",
  "published": "2025-07-04T15:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38212"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.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"
    }
  ]
}

GHSA-6CFJ-76QV-55WW

Vulnerability from github – Published: 2023-11-16 12:30 – Updated: 2023-11-16 12:30
VLAI
Details

Adobe Acrobat Reader versions 23.006.20360 (and earlier) and 20.005.30524 (and earlier) are 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-2023-44367"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-11-16T10:15:17Z",
    "severity": "HIGH"
  },
  "details": "Adobe Acrobat Reader versions 23.006.20360 (and earlier) and 20.005.30524 (and earlier) are 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-6cfj-76qv-55ww",
  "modified": "2023-11-16T12:30:21Z",
  "published": "2023-11-16T12:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44367"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/acrobat/apsb23-54.htm"
    }
  ],
  "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-6CGF-CCQV-HQC5

Vulnerability from github – Published: 2022-05-17 03:32 – Updated: 2025-04-12 12:57
VLAI
Details

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.333 and 19.x through 21.x before 21.0.0.182 on Windows and OS X and before 11.2.202.577 on Linux, Adobe AIR before 21.0.0.176, Adobe AIR SDK before 21.0.0.176, and Adobe AIR SDK & Compiler before 21.0.0.176 allows attackers to execute arbitrary code by using the actionCallMethod opcode with crafted arguments, a different vulnerability than CVE-2016-0987, CVE-2016-0988, CVE-2016-0990, CVE-2016-0991, CVE-2016-0995, CVE-2016-0996, CVE-2016-0997, CVE-2016-0998, CVE-2016-0999, and CVE-2016-1000.

Severity
8.8 (High)
CVSS:3.0/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-2016-0994"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-03-12T15:59:00Z",
    "severity": "HIGH"
  },
  "details": "Use-after-free vulnerability in Adobe Flash Player before 18.0.0.333 and 19.x through 21.x before 21.0.0.182 on Windows and OS X and before 11.2.202.577 on Linux, Adobe AIR before 21.0.0.176, Adobe AIR SDK before 21.0.0.176, and Adobe AIR SDK \u0026 Compiler before 21.0.0.176 allows attackers to execute arbitrary code by using the actionCallMethod opcode with crafted arguments, a different vulnerability than CVE-2016-0987, CVE-2016-0988, CVE-2016-0990, CVE-2016-0991, CVE-2016-0995, CVE-2016-0996, CVE-2016-0997, CVE-2016-0998, CVE-2016-0999, and CVE-2016-1000.",
  "id": "GHSA-6cgf-ccqv-hqc5",
  "modified": "2025-04-12T12:57:42Z",
  "published": "2022-05-17T03:32:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-0994"
    },
    {
      "type": "WEB",
      "url": "https://helpx.adobe.com/security/products/flash-player/apsb16-08.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201603-07"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00022.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00023.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00024.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00032.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/84312"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1035251"
    },
    {
      "type": "WEB",
      "url": "http://www.zerodayinitiative.com/advisories/ZDI-16-194"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-6CGR-4RV8-425W

Vulnerability from github – Published: 2025-01-14 18:32 – Updated: 2025-01-14 18:32
VLAI
Details

Microsoft Brokering File System Elevation of Privilege Vulnerability

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

{
  "affected": [],
  "aliases": [
    "CVE-2025-21315"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-14T18:15:55Z",
    "severity": "HIGH"
  },
  "details": "Microsoft Brokering File System Elevation of Privilege Vulnerability",
  "id": "GHSA-6cgr-4rv8-425w",
  "modified": "2025-01-14T18:32:04Z",
  "published": "2025-01-14T18:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21315"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21315"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-6CMV-M333-V5R3

Vulnerability from github – Published: 2023-05-03 00:30 – Updated: 2024-04-04 03:46
VLAI
Details

Use after free in OS Inputs in Google Chrome on ChromeOS prior to 113.0.5672.63 allowed a remote attacker who convinced a user to enage in specific UI interaction to potentially exploit heap corruption via crafted UI interaction. (Chromium security severity: Medium)

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-2023-2461"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-05-03T00:15:09Z",
    "severity": "HIGH"
  },
  "details": "Use after free in OS Inputs in Google Chrome on ChromeOS prior to 113.0.5672.63 allowed a remote attacker who convinced a user to enage in specific UI interaction to potentially exploit heap corruption via crafted UI interaction. (Chromium security severity: Medium)",
  "id": "GHSA-6cmv-m333-v5r3",
  "modified": "2024-04-04T03:46:56Z",
  "published": "2023-05-03T00:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-2461"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2023/05/stable-channel-update-for-desktop.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/1350561"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6P5RJ6UD37IPBWU3GPQNMIUFVOVCGSLY"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U3V6GPGMY6ZWVWPECMQGGOKQVATXJ5BA"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4JI552XDFD6DYFU6WNCRBCAXWOFOOSF"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202309-17"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5398"
    }
  ],
  "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-6CP7-G6M4-CJ75

Vulnerability from github – Published: 2026-04-14 18:30 – Updated: 2026-04-14 18:30
VLAI
Details

Use after free in Desktop Window Manager 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-2026-32155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-14T18:17:16Z",
    "severity": "HIGH"
  },
  "details": "Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.",
  "id": "GHSA-6cp7-g6m4-cj75",
  "modified": "2026-04-14T18:30:41Z",
  "published": "2026-04-14T18:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32155"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32155"
    }
  ],
  "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-6CPF-RMP5-W9PP

Vulnerability from github – Published: 2024-08-21 18:31 – Updated: 2024-08-21 18:31
VLAI
Details

Foxit PDF Reader AcroForm Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of AcroForms. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-23736.

Severity
7.8 (High)
CVSS:3.0/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-2024-7723"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-21T16:15:10Z",
    "severity": "HIGH"
  },
  "details": "Foxit PDF Reader AcroForm Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the handling of AcroForms. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-23736.",
  "id": "GHSA-6cpf-rmp5-w9pp",
  "modified": "2024-08-21T18:31:28Z",
  "published": "2024-08-21T18:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7723"
    },
    {
      "type": "WEB",
      "url": "https://www.foxit.com/support/security-bulletins.html"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-24-1125"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-6CPX-W2CG-QMGR

Vulnerability from github – Published: 2025-02-27 03:34 – Updated: 2025-09-19 15:31
VLAI
Details

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

net/mlx5: HWS, change error flow on matcher disconnect

Currently, when firmware failure occurs during matcher disconnect flow, the error flow of the function reconnects the matcher back and returns an error, which continues running the calling function and eventually frees the matcher that is being disconnected. This leads to a case where we have a freed matcher on the matchers list, which in turn leads to use-after-free and eventual crash.

This patch fixes that by not trying to reconnect the matcher back when some FW command fails during disconnect.

Note that we're dealing here with FW error. We can't overcome this problem. This might lead to bad steering state (e.g. wrong connection between matchers), and will also lead to resource leakage, as it is the case with any other error handling during resource destruction.

However, the goal here is to allow the driver to continue and not crash the machine with use-after-free error.

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-2025-21751"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T03:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, change error flow on matcher disconnect\n\nCurrently, when firmware failure occurs during matcher disconnect flow,\nthe error flow of the function reconnects the matcher back and returns\nan error, which continues running the calling function and eventually\nfrees the matcher that is being disconnected.\nThis leads to a case where we have a freed matcher on the matchers list,\nwhich in turn leads to use-after-free and eventual crash.\n\nThis patch fixes that by not trying to reconnect the matcher back when\nsome FW command fails during disconnect.\n\nNote that we\u0027re dealing here with FW error. We can\u0027t overcome this\nproblem. This might lead to bad steering state (e.g. wrong connection\nbetween matchers), and will also lead to resource leakage, as it is\nthe case with any other error handling during resource destruction.\n\nHowever, the goal here is to allow the driver to continue and not crash\nthe machine with use-after-free error.",
  "id": "GHSA-6cpx-w2cg-qmgr",
  "modified": "2025-09-19T15:31:07Z",
  "published": "2025-02-27T03:34:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21751"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ce840c7a659aa53a31ef49f0271b4fd0dc10296"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23a86c76a1a197e8fbbbd0ce3e826eb58c471624"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5682aad0276ff9b9b0eff3188eb6a1f504d6b436"
    }
  ],
  "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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