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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

10231 vulnerabilities reference this CWE, most recent first.

GHSA-GG87-FX88-M8H4

Vulnerability from github – Published: 2022-05-13 01:33 – Updated: 2022-05-13 01:33
VLAI
Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. 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 the display property of a button. 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-7138.

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
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{
  "affected": [],
  "aliases": [
    "CVE-2018-17694"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-24T04:29:00Z",
    "severity": "HIGH"
  },
  "details": "This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. 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 the display property of a button. 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-7138.",
  "id": "GHSA-gg87-fx88-m8h4",
  "modified": "2022-05-13T01:33:50Z",
  "published": "2022-05-13T01:33:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17694"
    },
    {
      "type": "WEB",
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-18-1224"
    }
  ],
  "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-GG87-XRJ2-3R8M

Vulnerability from github – Published: 2022-05-14 02:03 – Updated: 2024-03-14 21:30
VLAI
Details

Race condition in fs/timerfd.c in the Linux kernel before 4.10.15 allows local users to gain privileges or cause a denial of service (list corruption or use-after-free) via simultaneous file-descriptor operations that leverage improper might_cancel queueing.

Severity
7.0 (High)
CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2017-10661"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-08-19T18:29:00Z",
    "severity": "HIGH"
  },
  "details": "Race condition in fs/timerfd.c in the Linux kernel before 4.10.15 allows local users to gain privileges or cause a denial of service (list corruption or use-after-free) via simultaneous file-descriptor operations that leverage improper might_cancel queueing.",
  "id": "GHSA-gg87-xrj2-3r8m",
  "modified": "2024-03-14T21:30:50Z",
  "published": "2022-05-14T02:03:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-10661"
    },
    {
      "type": "WEB",
      "url": "https://github.com/torvalds/linux/commit/1e38da300e1e395a15048b0af1e5305bd91402f6"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3083"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3096"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4057"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:4058"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2020:0036"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1481136"
    },
    {
      "type": "WEB",
      "url": "https://source.android.com/security/bulletin/2017-08-01"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/43345"
    },
    {
      "type": "WEB",
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1e38da300e1e395a15048b0af1e5305bd91402f6"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2017/dsa-3981"
    },
    {
      "type": "WEB",
      "url": "http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.15"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/100215"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-GG89-F9MQ-2RW9

Vulnerability from github – Published: 2023-09-27 15:30 – Updated: 2024-01-07 12:30
VLAI
Details

A hashtable in the Ion Engine could have been mutated while there was a live interior reference, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 118.

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-2023-5172"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-27T15:19:42Z",
    "severity": "CRITICAL"
  },
  "details": "A hashtable  in the Ion Engine could have been mutated while there was a live interior reference, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox \u003c 118.",
  "id": "GHSA-gg89-f9mq-2rw9",
  "modified": "2024-01-07T12:30:29Z",
  "published": "2023-09-27T15:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5172"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1852218"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202401-10"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2023-41"
    }
  ],
  "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-GG8W-GW6H-W7MP

Vulnerability from github – Published: 2022-05-13 01:31 – Updated: 2022-05-13 01:31
VLAI
Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. 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 CPDF_Object objects. 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 under the context of the current process. Was ZDI-CAN-5414.

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-2018-9951"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-05-17T15:29:00Z",
    "severity": "HIGH"
  },
  "details": "This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. 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 CPDF_Object objects. 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 under the context of the current process. Was ZDI-CAN-5414.",
  "id": "GHSA-gg8w-gw6h-w7mp",
  "modified": "2022-05-13T01:31:39Z",
  "published": "2022-05-13T01:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-9951"
    },
    {
      "type": "WEB",
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php"
    },
    {
      "type": "WEB",
      "url": "https://zerodayinitiative.com/advisories/ZDI-18-335"
    }
  ],
  "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-GG9C-7J6M-3QQ2

Vulnerability from github – Published: 2024-03-26 21:30 – Updated: 2024-07-03 18:33
VLAI
Details

Use after free in ANGLE in Google Chrome prior to 123.0.6312.86 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)

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

{
  "affected": [],
  "aliases": [
    "CVE-2024-2883"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-26T21:15:53Z",
    "severity": "HIGH"
  },
  "details": "Use after free in ANGLE in Google Chrome prior to 123.0.6312.86 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)",
  "id": "GHSA-gg9c-7j6m-3qq2",
  "modified": "2024-07-03T18:33:49Z",
  "published": "2024-03-26T21:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-2883"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2024/03/stable-channel-update-for-desktop_26.html"
    },
    {
      "type": "WEB",
      "url": "https://issues.chromium.org/issues/327807820"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUWGSMA5X2NQP5XEFCLRWNX6246GZ2C"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G3RKI7VTQSIAI3PVZGRCHOSELTQXQ5FQ"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IQMRHKDEG4J7TMRRRGUGW6GS4MVBX5IT"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-GGFM-5H26-PPPX

Vulnerability from github – Published: 2022-11-09 12:00 – Updated: 2022-11-09 19:02
VLAI
Details

Use after free in V8 in Google Chrome prior to 107.0.5304.106 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chrome security severity: High)

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-2022-3885"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-09T04:15:00Z",
    "severity": "HIGH"
  },
  "details": "Use after free in V8 in Google Chrome prior to 107.0.5304.106 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chrome security severity: High)",
  "id": "GHSA-ggfm-5h26-pppx",
  "modified": "2022-11-09T19:02:22Z",
  "published": "2022-11-09T12:00:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3885"
    },
    {
      "type": "WEB",
      "url": "https://chromereleases.googleblog.com/2022/11/stable-channel-update-for-desktop.html"
    },
    {
      "type": "WEB",
      "url": "https://crbug.com/1377816"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5275"
    }
  ],
  "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-GGFW-X4FR-22GP

Vulnerability from github – Published: 2022-05-13 01:31 – Updated: 2022-05-13 01:31
VLAI
Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit 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 XFA remerge method. 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-7347.

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-2019-6727"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-03-21T16:01:00Z",
    "severity": "HIGH"
  },
  "details": "This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit 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 XFA remerge method. 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-7347.",
  "id": "GHSA-ggfw-x4fr-22gp",
  "modified": "2022-05-13T01:31:11Z",
  "published": "2022-05-13T01:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-6727"
    },
    {
      "type": "WEB",
      "url": "https://www.foxitsoftware.com/support/security-bulletins.php"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-19-133"
    }
  ],
  "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-GGFX-5H4R-JHQ3

Vulnerability from github – Published: 2024-12-12 03:33 – Updated: 2024-12-12 03:33
VLAI
Details

Microsoft Excel Remote Code Execution Vulnerability

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-2024-49069"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-12T02:04:30Z",
    "severity": "HIGH"
  },
  "details": "Microsoft Excel Remote Code Execution Vulnerability",
  "id": "GHSA-ggfx-5h4r-jhq3",
  "modified": "2024-12-12T03:33:04Z",
  "published": "2024-12-12T03:33:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49069"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49069"
    }
  ],
  "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-GGGR-PHRH-226M

Vulnerability from github – Published: 2022-05-13 00:00 – Updated: 2022-05-24 00:00
VLAI
Details

An exploitable use-after-free vulnerability exists in WPS Spreadsheets ( ET ) as part of WPS Office, version 11.2.0.10351. A specially-crafted XLS file can cause a use-after-free condition, resulting in remote code execution. An attacker needs to provide a malformed file to the victim to trigger the vulnerability.

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-2021-40399"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-05-12T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "An exploitable use-after-free vulnerability exists in WPS Spreadsheets ( ET ) as part of WPS Office, version 11.2.0.10351. A specially-crafted XLS file can cause a use-after-free condition, resulting in remote code execution. An attacker needs to provide a malformed file to the victim to trigger the vulnerability.",
  "id": "GHSA-gggr-phrh-226m",
  "modified": "2022-05-24T00:00:24Z",
  "published": "2022-05-13T00:00:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40399"
    },
    {
      "type": "WEB",
      "url": "https://security.wps.cn/notices/28"
    },
    {
      "type": "WEB",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1412"
    }
  ],
  "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-GGHH-GPX3-PMX6

Vulnerability from github – Published: 2024-05-01 06:31 – Updated: 2025-04-08 21:31
VLAI
Details

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

drm/i915/vma: Fix UAF on destroy against retire race

Object debugging tools were sporadically reporting illegal attempts to free a still active i915 VMA object when parking a GT believed to be idle.

[161.359441] ODEBUG: free active (active state 0) object: ffff88811643b958 object type: i915_active hint: __i915_vma_active+0x0/0x50 [i915] [161.360082] WARNING: CPU: 5 PID: 276 at lib/debugobjects.c:514 debug_print_object+0x80/0xb0 ... [161.360304] CPU: 5 PID: 276 Comm: kworker/5:2 Not tainted 6.5.0-rc1-CI_DRM_13375-g003f860e5577+ #1 [161.360314] Hardware name: Intel Corporation Rocket Lake Client Platform/RocketLake S UDIMM 6L RVP, BIOS RKLSFWI1.R00.3173.A03.2204210138 04/21/2022 [161.360322] Workqueue: i915-unordered __intel_wakeref_put_work [i915] [161.360592] RIP: 0010:debug_print_object+0x80/0xb0 ... [161.361347] debug_object_free+0xeb/0x110 [161.361362] i915_active_fini+0x14/0x130 [i915] [161.361866] release_references+0xfe/0x1f0 [i915] [161.362543] i915_vma_parked+0x1db/0x380 [i915] [161.363129] __gt_park+0x121/0x230 [i915] [161.363515] ____intel_wakeref_put_last+0x1f/0x70 [i915]

That has been tracked down to be happening when another thread is deactivating the VMA inside __active_retire() helper, after the VMA's active counter has been already decremented to 0, but before deactivation of the VMA's object is reported to the object debugging tool.

We could prevent from that race by serializing i915_active_fini() with __active_retire() via ref->tree_lock, but that wouldn't stop the VMA from being used, e.g. from __i915_vma_retire() called at the end of __active_retire(), after that VMA has been already freed by a concurrent i915_vma_destroy() on return from the i915_active_fini(). Then, we should rather fix the issue at the VMA level, not in i915_active.

Since __i915_vma_parked() is called from __gt_park() on last put of the GT's wakeref, the issue could be addressed by holding the GT wakeref long enough for __active_retire() to complete before that wakeref is released and the GT parked.

I believe the issue was introduced by commit d93939730347 ("drm/i915: Remove the vma refcount") which moved a call to i915_active_fini() from a dropped i915_vma_release(), called on last put of the removed VMA kref, to i915_vma_parked() processing path called on last put of a GT wakeref. However, its visibility to the object debugging tool was suppressed by a bug in i915_active that was fixed two weeks later with commit e92eb246feb9 ("drm/i915/active: Fix missing debug object activation").

A VMA associated with a request doesn't acquire a GT wakeref by itself. Instead, it depends on a wakeref held directly by the request's active intel_context for a GT associated with its VM, and indirectly on that intel_context's engine wakeref if the engine belongs to the same GT as the VMA's VM. Those wakerefs are released asynchronously to VMA deactivation.

Fix the issue by getting a wakeref for the VMA's GT when activating it, and putting that wakeref only after the VMA is deactivated. However, exclude global GTT from that processing path, otherwise the GPU never goes idle. Since __i915_vma_retire() may be called from atomic contexts, use async variant of wakeref put. Also, to avoid circular locking dependency, take care of acquiring the wakeref before VM mutex when both are needed.

v7: Add inline comments with justifications for: - using untracked variants of intel_gt_pm_get/put() (Nirmoy), - using async variant of _put(), - not getting the wakeref in case of a global GTT, - always getting the first wakeref outside vm->mutex. v6: Since __i915_vma_active/retire() callbacks are not serialized, storing a wakeref tracking handle inside struct i915_vma is not safe, and there is no other good place for that. Use untracked variants of intel_gt_pm_get/put_async(). v5: Replace "tile" with "GT" across commit description (Rodrigo), - ---truncated---

Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-26939"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:09Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/vma: Fix UAF on destroy against retire race\n\nObject debugging tools were sporadically reporting illegal attempts to\nfree a still active i915 VMA object when parking a GT believed to be idle.\n\n[161.359441] ODEBUG: free active (active state 0) object: ffff88811643b958 object type: i915_active hint: __i915_vma_active+0x0/0x50 [i915]\n[161.360082] WARNING: CPU: 5 PID: 276 at lib/debugobjects.c:514 debug_print_object+0x80/0xb0\n...\n[161.360304] CPU: 5 PID: 276 Comm: kworker/5:2 Not tainted 6.5.0-rc1-CI_DRM_13375-g003f860e5577+ #1\n[161.360314] Hardware name: Intel Corporation Rocket Lake Client Platform/RocketLake S UDIMM 6L RVP, BIOS RKLSFWI1.R00.3173.A03.2204210138 04/21/2022\n[161.360322] Workqueue: i915-unordered __intel_wakeref_put_work [i915]\n[161.360592] RIP: 0010:debug_print_object+0x80/0xb0\n...\n[161.361347] debug_object_free+0xeb/0x110\n[161.361362] i915_active_fini+0x14/0x130 [i915]\n[161.361866] release_references+0xfe/0x1f0 [i915]\n[161.362543] i915_vma_parked+0x1db/0x380 [i915]\n[161.363129] __gt_park+0x121/0x230 [i915]\n[161.363515] ____intel_wakeref_put_last+0x1f/0x70 [i915]\n\nThat has been tracked down to be happening when another thread is\ndeactivating the VMA inside __active_retire() helper, after the VMA\u0027s\nactive counter has been already decremented to 0, but before deactivation\nof the VMA\u0027s object is reported to the object debugging tool.\n\nWe could prevent from that race by serializing i915_active_fini() with\n__active_retire() via ref-\u003etree_lock, but that wouldn\u0027t stop the VMA from\nbeing used, e.g. from __i915_vma_retire() called at the end of\n__active_retire(), after that VMA has been already freed by a concurrent\ni915_vma_destroy() on return from the i915_active_fini().  Then, we should\nrather fix the issue at the VMA level, not in i915_active.\n\nSince __i915_vma_parked() is called from __gt_park() on last put of the\nGT\u0027s wakeref, the issue could be addressed by holding the GT wakeref long\nenough for __active_retire() to complete before that wakeref is released\nand the GT parked.\n\nI believe the issue was introduced by commit d93939730347 (\"drm/i915:\nRemove the vma refcount\") which moved a call to i915_active_fini() from\na dropped i915_vma_release(), called on last put of the removed VMA kref,\nto i915_vma_parked() processing path called on last put of a GT wakeref.\nHowever, its visibility to the object debugging tool was suppressed by a\nbug in i915_active that was fixed two weeks later with commit e92eb246feb9\n(\"drm/i915/active: Fix missing debug object activation\").\n\nA VMA associated with a request doesn\u0027t acquire a GT wakeref by itself.\nInstead, it depends on a wakeref held directly by the request\u0027s active\nintel_context for a GT associated with its VM, and indirectly on that\nintel_context\u0027s engine wakeref if the engine belongs to the same GT as the\nVMA\u0027s VM.  Those wakerefs are released asynchronously to VMA deactivation.\n\nFix the issue by getting a wakeref for the VMA\u0027s GT when activating it,\nand putting that wakeref only after the VMA is deactivated.  However,\nexclude global GTT from that processing path, otherwise the GPU never goes\nidle.  Since __i915_vma_retire() may be called from atomic contexts, use\nasync variant of wakeref put.  Also, to avoid circular locking dependency,\ntake care of acquiring the wakeref before VM mutex when both are needed.\n\nv7: Add inline comments with justifications for:\n    - using untracked variants of intel_gt_pm_get/put() (Nirmoy),\n    - using async variant of _put(),\n    - not getting the wakeref in case of a global GTT,\n    - always getting the first wakeref outside vm-\u003emutex.\nv6: Since __i915_vma_active/retire() callbacks are not serialized, storing\n    a wakeref tracking handle inside struct i915_vma is not safe, and\n    there is no other good place for that.  Use untracked variants of\n    intel_gt_pm_get/put_async().\nv5: Replace \"tile\" with \"GT\" across commit description (Rodrigo),\n  - \n---truncated---",
  "id": "GHSA-gghh-gpx3-pmx6",
  "modified": "2025-04-08T21:31:29Z",
  "published": "2024-05-01T06:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26939"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e45882ca829b26b915162e8e86dbb1095768e9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59b2626dd8c8a2e13f18054b3530e0c00073d79f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e3eb862df9f972ab677fb19e0d4b9b1be8db7b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/704edc9252f4988ae1ad7dafa23d0db8d90d7190"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/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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