{"id":"CVE-2024-50304","state":"PUBLISHED","title":"ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()","description":"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 <TASK>\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","publishedAt":"2024-11-19T17:19:30.242Z","updatedAt":"2026-05-11T20:49:33.704Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"31bd7378c6fe100a8af0e996ea0b5dafd3579df6","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"6ac5dfa575136da8dd8a9e7c1437c41f3a593993","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"ce11424026cbf87d5861b09e5e33565ff7f2ec8d","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"e0500e4373cd3d5eace1f1712444ab830b82c114","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/ip_tunnel.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.234","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.178","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.128","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.75","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.7","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/ip_tunnel.c"]}],"references":["https://git.kernel.org/stable/c/31bd7378c6fe100a8af0e996ea0b5dafd3579df6","https://git.kernel.org/stable/c/6ac5dfa575136da8dd8a9e7c1437c41f3a593993","https://git.kernel.org/stable/c/ce11424026cbf87d5861b09e5e33565ff7f2ec8d","https://git.kernel.org/stable/c/e0500e4373cd3d5eace1f1712444ab830b82c114","https://git.kernel.org/stable/c/f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6","https://git.kernel.org/stable/c/90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12","https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/50xxx/CVE-2024-50304.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50304","state":"PUBLISHED","datePublished":"2024-11-19T17:19:30.242Z","dateUpdated":"2026-05-11T20:49:33.704Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T19:36:19.987Z"},"containers":{"cna":{"title":"ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()","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 <TASK>\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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"31bd7378c6fe100a8af0e996ea0b5dafd3579df6","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"6ac5dfa575136da8dd8a9e7c1437c41f3a593993","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"ce11424026cbf87d5861b09e5e33565ff7f2ec8d","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"e0500e4373cd3d5eace1f1712444ab830b82c114","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6","versionType":"git"},{"version":"c54419321455631079c7d6e60bc732dd0c5914c5","status":"affected","lessThan":"90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/ip_tunnel.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.234","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.178","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.128","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.75","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.7","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/ip_tunnel.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/31bd7378c6fe100a8af0e996ea0b5dafd3579df6"},{"url":"https://git.kernel.org/stable/c/6ac5dfa575136da8dd8a9e7c1437c41f3a593993"},{"url":"https://git.kernel.org/stable/c/ce11424026cbf87d5861b09e5e33565ff7f2ec8d"},{"url":"https://git.kernel.org/stable/c/e0500e4373cd3d5eace1f1712444ab830b82c114"},{"url":"https://git.kernel.org/stable/c/f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6"},{"url":"https://git.kernel.org/stable/c/90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:49:33.704Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.234"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.1.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.6.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.11.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE 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