CVE-2025-21758 (GCVE-0-2025-21758)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2025-05-04 07:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
References
Impacted products
Vendor Product Version
Linux Linux Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
Version: b8ad0cbc58f703972e9e37c4e2a8081dd7e6a551
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{
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          "product": "Linux",
          "programFiles": [
            "net/ipv6/mcast.c"
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          "vendor": "Linux",
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              "version": "0",
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            {
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              "status": "unaffected",
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              "versionType": "semver"
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              "version": "6.13.4",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: add RCU protection to mld_newpack()\n\nmld_newpack() can be called without RTNL or RCU being held.\n\nNote that we no longer can use sock_alloc_send_skb() because\nipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.\n\nInstead use alloc_skb() and charge the net-\u003eipv6.igmp_sk\nsocket under RCU protection."
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:20:29.913Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3"
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          "url": "https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1"
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        },
        {
          "url": "https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373"
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      ],
      "title": "ipv6: mcast: add RCU protection to mld_newpack()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21758",
    "datePublished": "2025-02-27T02:18:12.496Z",
    "dateReserved": "2024-12-29T08:45:45.761Z",
    "dateUpdated": "2025-05-04T07:20:29.913Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21758\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T03:15:16.450\",\"lastModified\":\"2025-03-13T13:15:52.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: mcast: add RCU protection to mld_newpack()\\n\\nmld_newpack() can be called without RTNL or RCU being held.\\n\\nNote that we no longer can use sock_alloc_send_skb() because\\nipv6.igmp_sk uses GFP_KERNEL allocations which can sleep.\\n\\nInstead use alloc_skb() and charge the net-\u003eipv6.igmp_sk\\nsocket under RCU protection.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv6: mcast: agregar protecci\u00f3n RCU a mld_newpack() mld_newpack() se puede llamar sin que se mantenga RTNL o RCU. Tenga en cuenta que ya no podemos usar sock_alloc_send_skb() porque ipv6.igmp_sk usa asignaciones GFP_KERNEL que pueden dormir. En su lugar, use alloc_skb() y cargue el socket net-\u0026gt;ipv6.igmp_sk bajo la protecci\u00f3n RCU.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b91c597b0214b1b462eb627ec02658c944623f2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/25195f9d5ffcc8079ad743a50c0409dbdc48d98a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/29fa42197f26a97cde29fa8c40beddf44ea5c8f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a527750d877fd334de87eef81f1cb5f0f0ca3373\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d60d493b0e65647e0335e6a7c4547abcea7df8e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e8af3632a7f2da83e27b083f787bced1faba00b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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