ghsa-8xf7-6cv9-64f7
Vulnerability from github
Published
2024-02-23 15:30
Modified
2024-06-25 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Details

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

bpf: fix check for attempt to corrupt spilled pointer

When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0].

To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52462"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-23T15:15:08Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix check for attempt to corrupt spilled pointer\n\nWhen register is spilled onto a stack as a 1/2/4-byte register, we set\nslot_type[BPF_REG_SIZE - 1] (plus potentially few more below it,\ndepending on actual spill size). So to check if some stack slot has\nspilled register we need to consult slot_type[7], not slot_type[0].\n\nTo avoid the need to remember and double-check this in the future, just\nuse is_spilled_reg() helper.",
  "id": "GHSA-8xf7-6cv9-64f7",
  "modified": "2024-06-25T21:31:11Z",
  "published": "2024-02-23T15:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52462"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2757f17972d87773b3677777f5682510f13c66ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40617d45ea05535105e202a8a819e388a2b1f036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67e6707f07354ed1acb4e65552e97c60cf9d69cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8dc15b0670594543c356567a1a45b0182ec63174"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab125ed3ec1c10ccc36bc98c7a4256ad114a3dae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc3e3c50a0a4cac1463967c110686189e4a59104"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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