{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-26882", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv()\n\nApply the same fix than ones found in :\n\n8d975c15c0cd (\"ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()\")\n1ca1ba465e55 (\"geneve: make sure to pull inner header in geneve_rx()\")\n\nWe have to save skb->network_header in a temporary variable\nin order to be able to recompute the network_header pointer\nafter a pskb_inet_may_pull() call.\n\npskb_inet_may_pull() makes sure the needed headers are in skb->head.\n\nsyzbot reported:\nBUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]\n BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]\n BUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n BUG: KMSAN: uninit-value in ip_tunnel_rcv+0xed9/0x2ed0 net/ipv4/ip_tunnel.c:409\n __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]\n INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]\n IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n ip_tunnel_rcv+0xed9/0x2ed0 net/ipv4/ip_tunnel.c:409\n __ipgre_rcv+0x9bc/0xbc0 net/ipv4/ip_gre.c:389\n ipgre_rcv net/ipv4/ip_gre.c:411 [inline]\n gre_rcv+0x423/0x19f0 net/ipv4/ip_gre.c:447\n gre_rcv+0x2a4/0x390 net/ipv4/gre_demux.c:163\n ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205\n ip_local_deliver_finish+0x2b8/0x440 net/ipv4/ip_input.c:233\n NF_HOOK include/linux/netfilter.h:314 [inline]\n ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254\n dst_input include/net/dst.h:461 [inline]\n ip_rcv_finish net/ipv4/ip_input.c:449 [inline]\n NF_HOOK include/linux/netfilter.h:314 [inline]\n ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569\n __netif_receive_skb_one_core net/core/dev.c:5534 [inline]\n __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5648\n netif_receive_skb_internal net/core/dev.c:5734 [inline]\n netif_receive_skb+0x58/0x660 net/core/dev.c:5793\n tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1556\n tun_get_user+0x53b9/0x66e0 drivers/net/tun.c:2009\n tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2055\n call_write_iter include/linux/fs.h:2087 [inline]\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xb6b/0x1520 fs/read_write.c:590\n ksys_write+0x20f/0x4c0 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __x64_sys_write+0x93/0xd0 fs/read_write.c:652\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4590\n alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133\n alloc_pages+0x1be/0x1e0 mm/mempolicy.c:2204\n skb_page_frag_refill+0x2bf/0x7c0 net/core/sock.c:2909\n tun_build_skb drivers/net/tun.c:1686 [inline]\n tun_get_user+0xe0a/0x66e0 drivers/net/tun.c:1826\n tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2055\n call_write_iter include/linux/fs.h:2087 [inline]\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xb6b/0x1520 fs/read_write.c:590\n ksys_write+0x20f/0x4c0 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __x64_sys_write+0x93/0xd0 fs/read_write.c:652\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "c54419321455", "version_value": "ec6bb01e02cb" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.273", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.214", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.153", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.83", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.23", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.11", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.2", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/ec6bb01e02cbd47781dd90775b631a1dc4bd9d2b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/ec6bb01e02cbd47781dd90775b631a1dc4bd9d2b" }, { "url": "https://git.kernel.org/stable/c/77fd5294ea09b21f6772ac954a121b87323cec80", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/77fd5294ea09b21f6772ac954a121b87323cec80" }, { "url": "https://git.kernel.org/stable/c/5c03387021cfa3336b97e0dcba38029917a8af2a", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/5c03387021cfa3336b97e0dcba38029917a8af2a" }, { "url": "https://git.kernel.org/stable/c/60044ab84836359534bd7153b92e9c1584140e4a", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/60044ab84836359534bd7153b92e9c1584140e4a" }, { "url": "https://git.kernel.org/stable/c/c4c857723b37c20651300b3de4ff25059848b4b0", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c4c857723b37c20651300b3de4ff25059848b4b0" }, { "url": "https://git.kernel.org/stable/c/f6723d8dbfdc10c784a56748f86a9a3cd410dbd5", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f6723d8dbfdc10c784a56748f86a9a3cd410dbd5" }, { "url": "https://git.kernel.org/stable/c/ca914f1cdee8a85799942c9b0ce5015bbd6844e1", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/ca914f1cdee8a85799942c9b0ce5015bbd6844e1" }, { "url": "https://git.kernel.org/stable/c/b0ec2abf98267f14d032102551581c833b0659d3", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b0ec2abf98267f14d032102551581c833b0659d3" } ] }, "generator": { "engine": "bippy-9e1c9544281a" } }