CVE-2025-38271 (GCVE-0-2025-38271)

Vulnerability from cvelistv5 – Published: 2025-07-10 07:41 – Updated: 2025-07-28 04:16
VLAI?
Title
net: prevent a NULL deref in rtnl_create_link()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: prevent a NULL deref in rtnl_create_link() At the time rtnl_create_link() is running, dev->netdev_ops is NULL, we must not use netdev_lock_ops() or risk a NULL deref if CONFIG_NET_SHAPER is defined. Use netif_set_group() instead of dev_set_group(). RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline] RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [inline] RIP: 0010:dev_set_group+0xc0/0x230 net/core/dev_api.c:82 Call Trace: <TASK> rtnl_create_link+0x748/0xd10 net/core/rtnetlink.c:3674 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3813 __rtnl_newlink net/core/rtnetlink.c:3940 [inline] rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7e4d784f5810bba76c4593791028e13cce4af547 , < 8a29ae8428a5c26f0b4471c2057d9e9415c53109 (git)
Affected: 7e4d784f5810bba76c4593791028e13cce4af547 , < feafc73f3e6ae73371777a037d41d2e31c929636 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/rtnetlink.c"
          ],
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: prevent a NULL deref in rtnl_create_link()\n\nAt the time rtnl_create_link() is running, dev-\u003enetdev_ops is NULL,\nwe must not use netdev_lock_ops() or risk a NULL deref if\nCONFIG_NET_SHAPER is defined.\n\nUse netif_set_group() instead of dev_set_group().\n\n RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]\n RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [inline]\n RIP: 0010:dev_set_group+0xc0/0x230 net/core/dev_api.c:82\nCall Trace:\n \u003cTASK\u003e\n  rtnl_create_link+0x748/0xd10 net/core/rtnetlink.c:3674\n  rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3813\n  __rtnl_newlink net/core/rtnetlink.c:3940 [inline]\n  rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4055\n  rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6944\n  netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534\n  netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]\n  netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339\n  netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883\n  sock_sendmsg_nosec net/socket.c:712 [inline]"
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      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:16:52.653Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/feafc73f3e6ae73371777a037d41d2e31c929636"
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      "title": "net: prevent a NULL deref in rtnl_create_link()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38271",
    "datePublished": "2025-07-10T07:41:53.126Z",
    "dateReserved": "2025-04-16T04:51:23.998Z",
    "dateUpdated": "2025-07-28T04:16:52.653Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38271\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-10T08:15:25.307\",\"lastModified\":\"2025-11-20T16:53:50.167\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: prevent a NULL deref in rtnl_create_link()\\n\\nAt the time rtnl_create_link() is running, dev-\u003enetdev_ops is NULL,\\nwe must not use netdev_lock_ops() or risk a NULL deref if\\nCONFIG_NET_SHAPER is defined.\\n\\nUse netif_set_group() instead of dev_set_group().\\n\\n RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [inline]\\n RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [inline]\\n RIP: 0010:dev_set_group+0xc0/0x230 net/core/dev_api.c:82\\nCall Trace:\\n \u003cTASK\u003e\\n  rtnl_create_link+0x748/0xd10 net/core/rtnetlink.c:3674\\n  rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3813\\n  __rtnl_newlink net/core/rtnetlink.c:3940 [inline]\\n  rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4055\\n  rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6944\\n  netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534\\n  netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]\\n  netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339\\n  netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883\\n  sock_sendmsg_nosec net/socket.c:712 [inline]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: impide una desreferencia NULL en rtnl_create_link(). Mientras rtnl_create_link() se ejecuta, dev-\u0026gt;netdev_ops es NULL. No debemos usar netdev_lock_ops() o corremos el riesgo de una desreferencia NULL si CONFIG_NET_SHAPER est\u00e1 definido. Use netif_set_group() en lugar de dev_set_group(). RIP: 0010:netdev_need_ops_lock include/net/netdev_lock.h:33 [en l\u00ednea] RIP: 0010:netdev_lock_ops include/net/netdev_lock.h:41 [en l\u00ednea] RIP: 0010:dev_set_group+0xc0/0x230 net/core/dev_api.c:82 Rastreo de llamadas:  rtnl_create_link+0x748/0xd10 net/core/rtnetlink.c:3674 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3813 __rtnl_newlink net/core/rtnetlink.c:3940 [en l\u00ednea] rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4055 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6944 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [en l\u00ednea] netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [en l\u00ednea]\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.15\",\"versionEndExcluding\":\"6.15.3\",\"matchCriteriaId\":\"658B94DB-A94A-4588-94DD-614A72725C45\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/8a29ae8428a5c26f0b4471c2057d9e9415c53109\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/feafc73f3e6ae73371777a037d41d2e31c929636\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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