github - ghsa-v89r-8c65-6vgh

ghsa-v89r-8c65-6vgh

Vulnerability from github

Published

2024-07-12 15:31

Modified

2024-08-29 15:30

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

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

bpf: Fix a potential use-after-free in bpf_link_free()

After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40909"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:14Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix a potential use-after-free in bpf_link_free()\n\nAfter commit 1a80dbcb2dba, bpf_link can be freed by\nlink-\u003eops-\u003edealloc_deferred, but the code still tests and uses\nlink-\u003eops-\u003edealloc afterward, which leads to a use-after-free as\nreported by syzbot. Actually, one of them should be sufficient, so\njust call one of them instead of both. Also add a WARN_ON() in case\nof any problematic implementation.",
  "id": "GHSA-v89r-8c65-6vgh",
  "modified": "2024-08-29T15:30:31Z",
  "published": "2024-07-12T15:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40909"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382"
    }
  ],
  "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"
    }
  ]
}

cve-2024-40909

Vulnerability from cvelistv5

Published

2024-07-12 12:20

Modified

2025-05-04 12:57

Severity ?

Summary

bpf: Fix a potential use-after-free in bpf_link_free()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209
	https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382
	https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

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