CVE-2024-50304 (GCVE-0-2024-50304)

Vulnerability from cvelistv5 – Published: 2024-11-19 17:19 – Updated: 2026-05-11 20:49
VLAI?
Title
ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find() The per-netns IP tunnel hash table is protected by the RTNL mutex and ip_tunnel_find() is only called from the control path where the mutex is taken. Add a lockdep expression to hlist_for_each_entry_rcu() in ip_tunnel_find() in order to validate that the mutex is held and to silence the suspicious RCU usage warning [1]. [1] WARNING: suspicious RCU usage 6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted ----------------------------- net/ipv4/ip_tunnel.c:221 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by ip/362: #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60 stack backtrace: CPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <TASK> dump_stack_lvl+0xba/0x110 lockdep_rcu_suspicious.cold+0x4f/0xd6 ip_tunnel_find+0x435/0x4d0 ip_tunnel_newlink+0x517/0x7a0 ipgre_newlink+0x14c/0x170 __rtnl_newlink+0x1173/0x19c0 rtnl_newlink+0x6c/0xa0 rtnetlink_rcv_msg+0x3cc/0xf60 netlink_rcv_skb+0x171/0x450 netlink_unicast+0x539/0x7f0 netlink_sendmsg+0x8c1/0xd80 ____sys_sendmsg+0x8f9/0xc20 ___sys_sendmsg+0x197/0x1e0 __sys_sendmsg+0x122/0x1f0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < 31bd7378c6fe100a8af0e996ea0b5dafd3579df6 (git)
Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < 6ac5dfa575136da8dd8a9e7c1437c41f3a593993 (git)
Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < ce11424026cbf87d5861b09e5e33565ff7f2ec8d (git)
Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < e0500e4373cd3d5eace1f1712444ab830b82c114 (git)
Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6 (git)
Affected: c54419321455631079c7d6e60bc732dd0c5914c5 , < 90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12 (git)
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Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.178 , ≤ 5.15.* (semver)
Unaffected: 6.1.128 , ≤ 6.1.* (semver)
Unaffected: 6.6.75 , ≤ 6.6.* (semver)
Unaffected: 6.11.7 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()\\n\\nThe per-netns IP tunnel hash table is protected by the RTNL mutex and\\nip_tunnel_find() is only called from the control path where the mutex is\\ntaken.\\n\\nAdd a lockdep expression to hlist_for_each_entry_rcu() in\\nip_tunnel_find() in order to validate that the mutex is held and to\\nsilence the suspicious RCU usage warning [1].\\n\\n[1]\\nWARNING: suspicious RCU usage\\n6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted\\n-----------------------------\\nnet/ipv4/ip_tunnel.c:221 RCU-list traversed in non-reader section!!\\n\\nother info that might help us debug this:\\n\\nrcu_scheduler_active = 2, debug_locks = 1\\n1 lock held by ip/362:\\n #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60\\n\\nstack backtrace:\\nCPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139\\nHardware name: Bochs Bochs, BIOS Bochs 01/01/2011\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0xba/0x110\\n lockdep_rcu_suspicious.cold+0x4f/0xd6\\n ip_tunnel_find+0x435/0x4d0\\n ip_tunnel_newlink+0x517/0x7a0\\n ipgre_newlink+0x14c/0x170\\n __rtnl_newlink+0x1173/0x19c0\\n rtnl_newlink+0x6c/0xa0\\n rtnetlink_rcv_msg+0x3cc/0xf60\\n netlink_rcv_skb+0x171/0x450\\n netlink_unicast+0x539/0x7f0\\n netlink_sendmsg+0x8c1/0xd80\\n ____sys_sendmsg+0x8f9/0xc20\\n ___sys_sendmsg+0x197/0x1e0\\n __sys_sendmsg+0x122/0x1f0\\n do_syscall_64+0xbb/0x1d0\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv4: ip_tunnel: Se corrige la advertencia de uso sospechoso de RCU en ip_tunnel_find() La tabla hash del t\\u00fanel IP por netns est\\u00e1 protegida por el mutex RTNL y ip_tunnel_find() solo se llama desde la ruta de control donde se toma el mutex. Agregue una expresi\\u00f3n lockdep a hlist_for_each_entry_rcu() en ip_tunnel_find() para validar que se mantiene el mutex y silenciar la advertencia de uso sospechoso de RCU [1]. [1] ADVERTENCIA: uso sospechoso de RCU 6.12.0-rc3-custom-gd95d9a31aceb #139 No contaminado ----------------------------- net/ipv4/ip_tunnel.c:221 \\u00a1Lista de RCU recorrida en la secci\\u00f3n que no es de lectura! Otra informaci\\u00f3n que podr\\u00eda ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 1 bloqueo retenido por ip/362: #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, en: rtnetlink_rcv_msg+0x377/0xf60 seguimiento de pila: CPU: 12 UID: 0 PID: 362 Comm: ip No contaminado 6.12.0-rc3-custom-gd95d9a31aceb #139 Nombre del hardware: Bochs Bochs, BIOS Bochs 01/01/2011 Seguimiento de llamadas:  dump_stack_lvl+0xba/0x110 lockdep_rcu_suspicious.cold+0x4f/0xd6 ip_tunnel_find+0x435/0x4d0 ip_tunnel_newlink+0x517/0x7a0 ipgre_newlink+0x14c/0x170 __rtnl_newlink+0x1173/0x19c0 rtnl_newlink+0x6c/0xa0 rtnetlink_rcv_msg+0x3cc/0xf60 netlink_rcv_skb+0x171/0x450 netlink_unicast+0x539/0x7f0 netlink_sendmsg+0x8c1/0xd80 ____sys_sendmsg+0x8f9/0xc20 ___sys_sendmsg+0x197/0x1e0 __sys_sendmsg+0x122/0x1f0 hacer_syscall_64+0xbb/0x1d0 entrada_SYSCALL_64_despu\\u00e9s_hwframe+0x77/0x7f\"}]",
      "id": "CVE-2024-50304",
      "lastModified": "2024-11-27T21:20:08.113",
      "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}]}",
      "published": "2024-11-19T18:15:22.343",
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-50304\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-19T18:15:22.343\",\"lastModified\":\"2025-11-03T21:17:19.177\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()\\n\\nThe per-netns IP tunnel hash table is protected by the RTNL mutex and\\nip_tunnel_find() is only called from the control path where the mutex is\\ntaken.\\n\\nAdd a lockdep expression to hlist_for_each_entry_rcu() in\\nip_tunnel_find() in order to validate that the mutex is held and to\\nsilence the suspicious RCU usage warning [1].\\n\\n[1]\\nWARNING: suspicious RCU usage\\n6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted\\n-----------------------------\\nnet/ipv4/ip_tunnel.c:221 RCU-list traversed in non-reader section!!\\n\\nother info that might help us debug this:\\n\\nrcu_scheduler_active = 2, debug_locks = 1\\n1 lock held by ip/362:\\n #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60\\n\\nstack backtrace:\\nCPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139\\nHardware name: Bochs Bochs, BIOS Bochs 01/01/2011\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0xba/0x110\\n lockdep_rcu_suspicious.cold+0x4f/0xd6\\n ip_tunnel_find+0x435/0x4d0\\n ip_tunnel_newlink+0x517/0x7a0\\n ipgre_newlink+0x14c/0x170\\n __rtnl_newlink+0x1173/0x19c0\\n rtnl_newlink+0x6c/0xa0\\n rtnetlink_rcv_msg+0x3cc/0xf60\\n netlink_rcv_skb+0x171/0x450\\n netlink_unicast+0x539/0x7f0\\n netlink_sendmsg+0x8c1/0xd80\\n ____sys_sendmsg+0x8f9/0xc20\\n ___sys_sendmsg+0x197/0x1e0\\n __sys_sendmsg+0x122/0x1f0\\n do_syscall_64+0xbb/0x1d0\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv4: ip_tunnel: Se corrige la advertencia de uso sospechoso de RCU en ip_tunnel_find() La tabla hash del t\u00fanel IP por netns est\u00e1 protegida por el mutex RTNL y ip_tunnel_find() solo se llama desde la ruta de control donde se toma el mutex. Agregue una expresi\u00f3n lockdep a hlist_for_each_entry_rcu() en ip_tunnel_find() para validar que se mantiene el mutex y silenciar la advertencia de uso sospechoso de RCU [1]. [1] ADVERTENCIA: uso sospechoso de RCU 6.12.0-rc3-custom-gd95d9a31aceb #139 No contaminado ----------------------------- net/ipv4/ip_tunnel.c:221 \u00a1Lista de RCU recorrida en la secci\u00f3n que no es de lectura! Otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 1 bloqueo retenido por ip/362: #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, en: rtnetlink_rcv_msg+0x377/0xf60 seguimiento de pila: CPU: 12 UID: 0 PID: 362 Comm: ip No contaminado 6.12.0-rc3-custom-gd95d9a31aceb #139 Nombre del hardware: Bochs Bochs, BIOS Bochs 01/01/2011 Seguimiento de llamadas:  dump_stack_lvl+0xba/0x110 lockdep_rcu_suspicious.cold+0x4f/0xd6 ip_tunnel_find+0x435/0x4d0 ip_tunnel_newlink+0x517/0x7a0 ipgre_newlink+0x14c/0x170 __rtnl_newlink+0x1173/0x19c0 rtnl_newlink+0x6c/0xa0 rtnetlink_rcv_msg+0x3cc/0xf60 netlink_rcv_skb+0x171/0x450 netlink_unicast+0x539/0x7f0 netlink_sendmsg+0x8c1/0xd80 ____sys_sendmsg+0x8f9/0xc20 ___sys_sendmsg+0x197/0x1e0 __sys_sendmsg+0x122/0x1f0 hacer_syscall_64+0xbb/0x1d0 entrada_SYSCALL_64_despu\u00e9s_hwframe+0x77/0x7f\"}],\"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:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.10.12\",\"versionEndExcluding\":\"6.11.7\",\"matchCriteriaId\":\"71D5AD44-225A-4EFC-B47D-2C5EFE16D98B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F361E1D-580F-4A2D-A509-7615F73167A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"925478D0-3E3D-4E6F-ACD5-09F28D5DF82C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C95E234-D335-4B6C-96BF-E2CEBD8654ED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0F717D8-3014-4F84-8086-0124B2111379\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"24DBE6C7-2AAE-4818-AED2-E131F153D2FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"24B88717-53F5-42AA-9B72-14C707639E3F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/31bd7378c6fe100a8af0e996ea0b5dafd3579df6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6ac5dfa575136da8dd8a9e7c1437c41f3a593993\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ce11424026cbf87d5861b09e5e33565ff7f2ec8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0500e4373cd3d5eace1f1712444ab830b82c114\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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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.