GHSA-G6XR-FXVQ-FFP4

Vulnerability from github – Published: 2025-08-22 15:33 – Updated: 2026-03-18 18:31
VLAI
Details

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

net/packet: fix a race in packet_set_ring() and packet_notifier()

When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event.

This race and the fix are both similar to that of commit 15fe076edea7 ("net/packet: fix a race in packet_bind() and packet_notifier()").

There too the packet_notifier NETDEV_UP event managed to run while a po->bind_lock critical section had to be temporarily released. And the fix was similarly to temporarily set po->num to zero to keep the socket unhooked until the lock is retaken.

The po->bind_lock in packet_set_ring and packet_notifier precede the introduction of git history.

Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-38617"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-22T14:15:46Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: fix a race in packet_set_ring() and packet_notifier()\n\nWhen packet_set_ring() releases po-\u003ebind_lock, another thread can\nrun packet_notifier() and process an NETDEV_UP event.\n\nThis race and the fix are both similar to that of commit 15fe076edea7\n(\"net/packet: fix a race in packet_bind() and packet_notifier()\").\n\nThere too the packet_notifier NETDEV_UP event managed to run while a\npo-\u003ebind_lock critical section had to be temporarily released. And\nthe fix was similarly to temporarily set po-\u003enum to zero to keep\nthe socket unhooked until the lock is retaken.\n\nThe po-\u003ebind_lock in packet_set_ring and packet_notifier precede the\nintroduction of git history.",
  "id": "GHSA-g6xr-fxvq-ffp4",
  "modified": "2026-03-18T18:31:09Z",
  "published": "2025-08-22T15:33:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38617"
    },
    {
      "type": "WEB",
      "url": "https://github.com/google/security-research/pull/339"
    },
    {
      "type": "WEB",
      "url": "https://blog.calif.io/p/a-race-within-a-race-exploiting-cve"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18df"
    },
    {
      "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:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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