CVE-2024-26857
Vulnerability from cvelistv5
Published
2024-04-17 10:17
Modified
2024-11-06 16:53
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
geneve: make sure to pull inner header in geneve_rx()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/048e16dee1fc609c1c85072ccd70bfd4b5fef6ca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ece581d2a66e8e488c0d3b3e7b5760dbbfdbdd5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ca1ba465e55b9460e4e75dec9fff31e708fec74
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59d2a4076983303f324557a114cfd5c32e1f6b29
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0b22568a9d8384fd000cc49acb8f74bde40d1b5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7137900691f5692fe3de54566ea7b30bb35d66c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e431c3227864b5646601c97f5f898d99472f2914
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e77e0b0f2a11735c64b105edaee54d6344faca8a
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngeneve: make sure to pull inner header in geneve_rx()\n\nsyzbot triggered a bug in geneve_rx() [1]\n\nIssue is similar to the one I fixed in commit 8d975c15c0cd\n(\"ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()\")\n\nWe have to save skb-\u003enetwork_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-\u003ehead.\n\n[1]\nBUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n BUG: KMSAN: uninit-value in geneve_rx drivers/net/geneve.c:279 [inline]\n BUG: KMSAN: uninit-value in geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\n  IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\n  geneve_rx drivers/net/geneve.c:279 [inline]\n  geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\n  udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108\n  udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186\n  udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp.c:2346\n  __udp4_lib_rcv+0x1c6b/0x3010 net/ipv4/udp.c:2422\n  udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604\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  process_backlog+0x480/0x8b0 net/core/dev.c:5976\n  __napi_poll+0xe3/0x980 net/core/dev.c:6576\n  napi_poll net/core/dev.c:6645 [inline]\n  net_rx_action+0x8b8/0x1870 net/core/dev.c:6778\n  __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553\n  do_softirq+0x9a/0xf0 kernel/softirq.c:454\n  __local_bh_enable_ip+0x9b/0xa0 kernel/softirq.c:381\n  local_bh_enable include/linux/bottom_half.h:33 [inline]\n  rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]\n  __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378\n  dev_queue_xmit include/linux/netdevice.h:3171 [inline]\n  packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\n  packet_snd net/packet/af_packet.c:3081 [inline]\n  packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg net/socket.c:745 [inline]\n  __sys_sendto+0x735/0xa10 net/socket.c:2191\n  __do_sys_sendto net/socket.c:2203 [inline]\n  __se_sys_sendto net/socket.c:2199 [inline]\n  __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\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  slab_post_alloc_hook mm/slub.c:3819 [inline]\n  slab_alloc_node mm/slub.c:3860 [inline]\n  kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560\n  __alloc_skb+0x352/0x790 net/core/skbuff.c:651\n  alloc_skb include/linux/skbuff.h:1296 [inline]\n  alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394\n  sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783\n  packet_alloc_skb net/packet/af_packet.c:2930 [inline]\n  packet_snd net/packet/af_packet.c:3024 [inline]\n  packet_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg net/socket.c:745 [inline]\n  __sys_sendto+0x735/0xa10 net/socket.c:2191\n  __do_sys_sendto net/socket.c:2203 [inline]\n  __se_sys_sendto net/socket.c:2199 [inline]\n  __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\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"
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        "dateUpdated": "2024-11-05T09:17:04.336Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "geneve: make sure to pull inner header in geneve_rx()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26857",
    "datePublished": "2024-04-17T10:17:19.115Z",
    "dateReserved": "2024-02-19T14:20:24.183Z",
    "dateUpdated": "2024-11-06T16:53:14.290Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26857\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:08.787\",\"lastModified\":\"2024-11-06T17:35:29.517\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngeneve: make sure to pull inner header in geneve_rx()\\n\\nsyzbot triggered a bug in geneve_rx() [1]\\n\\nIssue is similar to the one I fixed in commit 8d975c15c0cd\\n(\\\"ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()\\\")\\n\\nWe have to save skb-\u003enetwork_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-\u003ehead.\\n\\n[1]\\nBUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\\n BUG: KMSAN: uninit-value in geneve_rx drivers/net/geneve.c:279 [inline]\\n BUG: KMSAN: uninit-value in geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\\n  IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]\\n  geneve_rx drivers/net/geneve.c:279 [inline]\\n  geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391\\n  udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108\\n  udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186\\n  udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp.c:2346\\n  __udp4_lib_rcv+0x1c6b/0x3010 net/ipv4/udp.c:2422\\n  udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604\\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  process_backlog+0x480/0x8b0 net/core/dev.c:5976\\n  __napi_poll+0xe3/0x980 net/core/dev.c:6576\\n  napi_poll net/core/dev.c:6645 [inline]\\n  net_rx_action+0x8b8/0x1870 net/core/dev.c:6778\\n  __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553\\n  do_softirq+0x9a/0xf0 kernel/softirq.c:454\\n  __local_bh_enable_ip+0x9b/0xa0 kernel/softirq.c:381\\n  local_bh_enable include/linux/bottom_half.h:33 [inline]\\n  rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]\\n  __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378\\n  dev_queue_xmit include/linux/netdevice.h:3171 [inline]\\n  packet_xmit+0x9c/0x6b0 net/packet/af_packet.c:276\\n  packet_snd net/packet/af_packet.c:3081 [inline]\\n  packet_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113\\n  sock_sendmsg_nosec net/socket.c:730 [inline]\\n  __sock_sendmsg net/socket.c:745 [inline]\\n  __sys_sendto+0x735/0xa10 net/socket.c:2191\\n  __do_sys_sendto net/socket.c:2203 [inline]\\n  __se_sys_sendto net/socket.c:2199 [inline]\\n  __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\\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  slab_post_alloc_hook mm/slub.c:3819 [inline]\\n  slab_alloc_node mm/slub.c:3860 [inline]\\n  kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903\\n  kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560\\n  __alloc_skb+0x352/0x790 net/core/skbuff.c:651\\n  alloc_skb include/linux/skbuff.h:1296 [inline]\\n  alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394\\n  sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783\\n  packet_alloc_skb net/packet/af_packet.c:2930 [inline]\\n  packet_snd net/packet/af_packet.c:3024 [inline]\\n  packet_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113\\n  sock_sendmsg_nosec net/socket.c:730 [inline]\\n  __sock_sendmsg net/socket.c:745 [inline]\\n  __sys_sendto+0x735/0xa10 net/socket.c:2191\\n  __do_sys_sendto net/socket.c:2203 [inline]\\n  __se_sys_sendto net/socket.c:2199 [inline]\\n  __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199\\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\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: geneve: aseg\u00farese de extraer el encabezado interno en geneve_rx() syzbot desencaden\u00f3 un error en geneve_rx() [1] El problema es similar al que solucion\u00e9 en la confirmaci\u00f3n 8d975c15c0cd (\\\"ip6_tunnel: aseg\u00farese de extraer el encabezado interno en __ip6_tnl_rcv()\\\"). Tenemos que guardar skb-\u0026gt;network_header en una variable temporal para poder volver a calcular el puntero network_header despu\u00e9s de una llamada a pskb_inet_may_pull(). pskb_inet_may_pull() se asegura de que los encabezados necesarios est\u00e9n en skb-\u0026gt;head. [1] ERROR: KMSAN: valor uninit en IP_ECN_decapsulate include/net/inet_ecn.h:302 [en l\u00ednea] ERROR: KMSAN: valor uninit en geneve_rx drivers/net/geneve.c:279 [en l\u00ednea] ERROR: KMSAN: uninit -valor en geneve_udp_encap_recv+0x36f9/0x3c10 drivers/net/geneve.c:391 IP_ECN_decapsulate include/net/inet_ecn.h:302 [en l\u00ednea] geneve_rx drivers/net/geneve.c:279 [en l\u00ednea] geneve_udp_encap_recv+0x36f9/0x3c10 drivers/ net/geneve.c:391 udp_queue_rcv_one_skb+0x1d39/0x1f20 net/ipv4/udp.c:2108 udp_queue_rcv_skb+0x6ae/0x6e0 net/ipv4/udp.c:2186 udp_unicast_rcv_skb+0x184/0x4b0 net/ipv4/udp. c:2346 __udp4_lib_rcv +0x1c6b/0x3010 net/ipv4/udp.c:2422 udp_rcv+0x7d/0xa0 net/ipv4/udp.c:2604 ip_protocol_deliver_rcu+0x264/0x1300 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2b8/0x440 net/ ipv4/ ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [en l\u00ednea] ip_local_deliver+0x21f/0x490 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [en l\u00ednea] ip_rcv_finish net/ipv4/ ip_input.c:449 [en l\u00ednea] NF_HOOK include/linux/netfilter.h:314 [en l\u00ednea] ip_rcv+0x46f/0x760 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5534 [en l\u00ednea] __netif_receive_skb+ 0x1a6/0x5a0 net/core/dev.c:5648 Process_backlog+0x480/0x8b0 net/core/dev.c:5976 __napi_poll+0xe3/0x980 net/core/dev.c:6576 napi_poll net/core/dev.c:6645 [en l\u00ednea] net_rx_action+0x8b8/0x1870 net/core/dev.c:6778 __do_softirq+0x1b7/0x7c5 kernel/softirq.c:553 do_softirq+0x9a/0xf0 kernel/softirq.c:454 __local_bh_enable_ip+0x9b/0xa0 kernel/softirq. c:381 local_bh_enable include/linux/bottom_half.h:33 [en l\u00ednea] rcu_read_unlock_bh include/linux/rcupdate.h:820 [en l\u00ednea] __dev_queue_xmit+0x2768/0x51c0 net/core/dev.c:4378 dev_queue_xmit include/linux/netdevice. h:3171 [en l\u00ednea] paquete_xmit+0x9c/0x6b0 net/packet/af_packet.c:276 paquete_snd net/packet/af_packet.c:3081 [en l\u00ednea] paquete_sendmsg+0x8aef/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/ socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en l\u00ednea] __se_sys_sendto net/socket.c:2199 [en l\u00ednea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x63 / 0x6b Uninit se cre\u00f3 en: slab_post_alloc_hook mm/slub.c:3819 [en l\u00ednea] slab_alloc_node mm/slub.c:3860 [en l\u00ednea] kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff .c:560 __alloc_skb+0x352/0x790 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1296 [en l\u00ednea] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783 paquete_alloc_skb net/packet/af_packet.c:2930 [en l\u00ednea] paquete_snd net/packet/af_packet.c:3024 [en l\u00ednea] paquete_sendmsg+0x70c2/0x9f10 net/packet/af_packet.c:3113 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c:745 [en l\u00ednea] __sys_sendto+0x735/0xa10 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [en l\u00ednea] __se_sys_sendto net/socket.c :2199 [en l\u00ednea] __x64_sys_sendto+0x125/0x1c0 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe + 0x63/0x6b\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/048e16dee1fc609c1c85072ccd70bfd4b5fef6ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0ece581d2a66e8e488c0d3b3e7b5760dbbfdbdd5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1ca1ba465e55b9460e4e75dec9fff31e708fec74\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/59d2a4076983303f324557a114cfd5c32e1f6b29\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0b22568a9d8384fd000cc49acb8f74bde40d1b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c7137900691f5692fe3de54566ea7b30bb35d66c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e431c3227864b5646601c97f5f898d99472f2914\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e77e0b0f2a11735c64b105edaee54d6344faca8a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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