CVE-2024-35934 (GCVE-0-2024-35934)

Vulnerability from cvelistv5 – Published: 2024-05-19 10:10 – Updated: 2026-05-12 11:52
VLAI?
Title
net/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list() Many syzbot reports show extreme rtnl pressure, and many of them hint that smc acquires rtnl in netns creation for no good reason [1] This patch returns early from smc_pnet_net_init() if there is no netdevice yet. I am not even sure why smc_pnet_create_pnetids_list() even exists, because smc_pnet_netdev_event() is also calling smc_pnet_add_base_pnetid() when handling NETDEV_UP event. [1] extract of typical syzbot reports 2 locks held by syz-executor.3/12252: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.4/12253: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.1/12257: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.2/12261: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.0/12265: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.3/12268: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.4/12271: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.1/12274: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 locks held by syz-executor.2/12280: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < bc4d1ebca11b4f194e262326bd45938e857c59d2 (git)
Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < b9117dc783c0ab0a3866812f70e07bf2ea071ac4 (git)
Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23 (git)
Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < a2e6bffc0388526ed10406040279a693d62b36ec (git)
Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < 6e920422e7104928f760fc0e12b6d65ab097a2e7 (git)
Affected: e888a2e8337c96dd785d204cf8ff775e79173add , < 00af2aa93b76b1bade471ad0d0525d4d29ca5cc0 (git)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.155 , ≤ 5.15.* (semver)
Unaffected: 6.1.86 , ≤ 6.1.* (semver)
Unaffected: 6.6.27 , ≤ 6.6.* (semver)
Unaffected: 6.8.6 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()\n\nMany syzbot reports show extreme rtnl pressure, and many of them hint\nthat smc acquires rtnl in netns creation for no good reason [1]\n\nThis patch returns early from smc_pnet_net_init()\nif there is no netdevice yet.\n\nI am not even sure why smc_pnet_create_pnetids_list() even exists,\nbecause smc_pnet_netdev_event() is also calling\nsmc_pnet_add_base_pnetid() when handling NETDEV_UP event.\n\n[1] extract of typical syzbot reports\n\n2 locks held by syz-executor.3/12252:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.4/12253:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.1/12257:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.2/12261:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.0/12265:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.3/12268:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.4/12271:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.1/12274:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\n2 locks held by syz-executor.2/12280:\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878"
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    "epss": {
      "cve": "CVE-2024-35934",
      "date": "2026-05-19",
      "epss": "0.00015",
      "percentile": "0.03047"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()\\n\\nMany syzbot reports show extreme rtnl pressure, and many of them hint\\nthat smc acquires rtnl in netns creation for no good reason [1]\\n\\nThis patch returns early from smc_pnet_net_init()\\nif there is no netdevice yet.\\n\\nI am not even sure why smc_pnet_create_pnetids_list() even exists,\\nbecause smc_pnet_netdev_event() is also calling\\nsmc_pnet_add_base_pnetid() when handling NETDEV_UP event.\\n\\n[1] extract of typical syzbot reports\\n\\n2 locks held by syz-executor.3/12252:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12253:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12257:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12261:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.0/12265:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.3/12268:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12271:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12274:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12280:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: reduce la presi\\u00f3n rtnl en smc_pnet_create_pnetids_list() Muchos informes de syzbot muestran una presi\\u00f3n rtnl extrema, y muchos de ellos insin\\u00faan que smc adquiere rtnl en la creaci\\u00f3n de netns sin una buena raz\\u00f3n [1] Este parche regresa temprano desde smc_pnet_net_init() si a\\u00fan no hay un netdevice. Ni siquiera estoy seguro de por qu\\u00e9 existe smc_pnet_create_pnetids_list(), porque smc_pnet_netdev_event() tambi\\u00e9n llama a smc_pnet_add_base_pnetid() cuando maneja el evento NETDEV_UP. [1] extracto de informes t\\u00edpicos de syzbot 2 bloqueos mantenidos por syz-executor.3/12252: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core /net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+ .+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.4/12253: #0: ffffffff8f369610 (pernet_ops_rwsem){+++ +}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/ smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.1/12257: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex ){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en : smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.2/12261: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns +0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1 : ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.0/12265: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3 }, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet. c:878 2 bloqueos retenidos por syz-executor.3/12268: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c: 491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}- {3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.4/12271: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3 :3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c :809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.1 /12274: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+ .}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/ 0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.2/12280: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net /core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex) {+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\"}]",
      "id": "CVE-2024-35934",
      "lastModified": "2024-11-21T09:21:14.217",
      "published": "2024-05-19T11:15:49.343",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35934\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T11:15:49.343\",\"lastModified\":\"2026-05-12T12:16:41.970\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()\\n\\nMany syzbot reports show extreme rtnl pressure, and many of them hint\\nthat smc acquires rtnl in netns creation for no good reason [1]\\n\\nThis patch returns early from smc_pnet_net_init()\\nif there is no netdevice yet.\\n\\nI am not even sure why smc_pnet_create_pnetids_list() even exists,\\nbecause smc_pnet_netdev_event() is also calling\\nsmc_pnet_add_base_pnetid() when handling NETDEV_UP event.\\n\\n[1] extract of typical syzbot reports\\n\\n2 locks held by syz-executor.3/12252:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12253:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12257:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12261:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.0/12265:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.3/12268:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12271:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12274:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12280:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: reduce la presi\u00f3n rtnl en smc_pnet_create_pnetids_list() Muchos informes de syzbot muestran una presi\u00f3n rtnl extrema, y muchos de ellos insin\u00faan que smc adquiere rtnl en la creaci\u00f3n de netns sin una buena raz\u00f3n [1] Este parche regresa temprano desde smc_pnet_net_init() si a\u00fan no hay un netdevice. Ni siquiera estoy seguro de por qu\u00e9 existe smc_pnet_create_pnetids_list(), porque smc_pnet_netdev_event() tambi\u00e9n llama a smc_pnet_add_base_pnetid() cuando maneja el evento NETDEV_UP. [1] extracto de informes t\u00edpicos de syzbot 2 bloqueos mantenidos por syz-executor.3/12252: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core /net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+ .+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.4/12253: #0: ffffffff8f369610 (pernet_ops_rwsem){+++ +}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/ smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.1/12257: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex ){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en : smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.2/12261: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns +0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1 : ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.0/12265: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3 }, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet. c:878 2 bloqueos retenidos por syz-executor.3/12268: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c: 491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}- {3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.4/12271: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3 :3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c :809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.1 /12274: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+ .}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/ 0x1e0 net/smc/smc_pnet.c:878 2 bloqueos retenidos por syz-executor.2/12280: #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, en: copy_net_ns+0x4c7/0x7b0 net /core/net_namespace.c:491 #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, en: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [en l\u00ednea] #1: ffffffff8f375b88 (rtnl_mutex) {+.+.}-{3:3}, en: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\"}],\"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\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.10.215\",\"matchCriteriaId\":\"882BE7BA-C4A6-4167-8FA9-CBEDFBE98A67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.155\",\"matchCriteriaId\":\"F11B6314-A852-4FBD-AD84-ECE23F5C092B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.86\",\"matchCriteriaId\":\"F5D13FF4-8931-475F-A397-FD0594589F56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.27\",\"matchCriteriaId\":\"41504EFE-0C3F-4B7C-B855-EFE4FA9ACB84\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.8.6\",\"matchCriteriaId\":\"22CA5433-1303-41EF-AD4C-F4645DC01541\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:21:48.966Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-35934\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:40:58.599297Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:15.745Z\"}}], \"cna\": {\"title\": \"net/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"bc4d1ebca11b4f194e262326bd45938e857c59d2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"b9117dc783c0ab0a3866812f70e07bf2ea071ac4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"a2e6bffc0388526ed10406040279a693d62b36ec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"6e920422e7104928f760fc0e12b6d65ab097a2e7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e888a2e8337c96dd785d204cf8ff775e79173add\", \"lessThan\": \"00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\", \"versionType\": \"git\"}], \"programFiles\": [\"net/smc/smc_pnet.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.215\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.155\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.86\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.27\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/smc/smc_pnet.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/bc4d1ebca11b4f194e262326bd45938e857c59d2\"}, {\"url\": \"https://git.kernel.org/stable/c/b9117dc783c0ab0a3866812f70e07bf2ea071ac4\"}, {\"url\": \"https://git.kernel.org/stable/c/d7ee3bf0caf599c14db0bf4af7aacd6206ef8a23\"}, {\"url\": \"https://git.kernel.org/stable/c/a2e6bffc0388526ed10406040279a693d62b36ec\"}, {\"url\": \"https://git.kernel.org/stable/c/6e920422e7104928f760fc0e12b6d65ab097a2e7\"}, {\"url\": \"https://git.kernel.org/stable/c/00af2aa93b76b1bade471ad0d0525d4d29ca5cc0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: reduce rtnl pressure in smc_pnet_create_pnetids_list()\\n\\nMany syzbot reports show extreme rtnl pressure, and many of them hint\\nthat smc acquires rtnl in netns creation for no good reason [1]\\n\\nThis patch returns early from smc_pnet_net_init()\\nif there is no netdevice yet.\\n\\nI am not even sure why smc_pnet_create_pnetids_list() even exists,\\nbecause smc_pnet_netdev_event() is also calling\\nsmc_pnet_add_base_pnetid() when handling NETDEV_UP event.\\n\\n[1] extract of typical syzbot reports\\n\\n2 locks held by syz-executor.3/12252:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12253:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12257:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12261:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.0/12265:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.3/12268:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.4/12271:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.1/12274:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\\n2 locks held by syz-executor.2/12280:\\n  #0: ffffffff8f369610 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline]\\n  #1: ffffffff8f375b88 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x10a/0x1e0 net/smc/smc_pnet.c:878\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.215\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.155\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.86\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.27\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.6\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:35:49.259Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35934\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:35:49.259Z\", \"dateReserved\": \"2024-05-17T13:50:33.130Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-19T10:10:41.668Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.