{
  "schema_version": "1.4.0",
  "id": "GHSA-37c3-qm4g-jf9g",
  "modified": "2024-12-30T18:30:41Z",
  "published": "2024-05-19T09:34:47Z",
  "aliases": [
    "CVE-2024-35895"
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Prevent lock inversion deadlock in map delete elem\n\nsyzkaller started using corpuses where a BPF tracing program deletes\nelements from a sockmap/sockhash map. Because BPF tracing programs can be\ninvoked from any interrupt context, locks taken during a map_delete_elem\noperation must be hardirq-safe. Otherwise a deadlock due to lock inversion\nis possible, as reported by lockdep:\n\n       CPU0                    CPU1\n       ----                    ----\n  lock(&htab->buckets[i].lock);\n                               local_irq_disable();\n                               lock(&host->lock);\n                               lock(&htab->buckets[i].lock);\n  <Interrupt>\n    lock(&host->lock);\n\nLocks in sockmap are hardirq-unsafe by design. We expects elements to be\ndeleted from sockmap/sockhash only in task (normal) context with interrupts\nenabled, or in softirq context.\n\nDetect when map_delete_elem operation is invoked from a context which is\n_not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an\nerror.\n\nNote that map updates are not affected by this issue. BPF verifier does not\nallow updating sockmap/sockhash from a BPF tracing program today.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
    }
  ],
  "affected": [],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35895"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/668b3074aa14829e2ac2759799537a93b60fef86"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6af057ccdd8e7619960aca1f0428339f213b31cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/913c30f827e17d8cda1da6eeb990f350d36cb69b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a44770fed86515eedb5a7c00b787f847ebb134a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd54b48db0c822ae7b520bc80751f0a0a173ef75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7990498b05ac41f7d6a190dc0418ef1d21bf058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff91059932401894e6c86341915615c5eb0eca48"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "severity": "MODERATE",
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-19T09:15:10Z"
  }
}