CVE-2024-46763 (GCVE-0-2024-46763)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-05-11 20:35
VLAI
Title
fou: Fix null-ptr-deref in GRO.
Summary
In the Linux kernel, the following vulnerability has been resolved: fou: Fix null-ptr-deref in GRO. We observed a null-ptr-deref in fou_gro_receive() while shutting down a host. [0] The NULL pointer is sk->sk_user_data, and the offset 8 is of protocol in struct fou. When fou_release() is called due to netns dismantle or explicit tunnel teardown, udp_tunnel_sock_release() sets NULL to sk->sk_user_data. Then, the tunnel socket is destroyed after a single RCU grace period. So, in-flight udp4_gro_receive() could find the socket and execute the FOU GRO handler, where sk->sk_user_data could be NULL. Let's use rcu_dereference_sk_user_data() in fou_from_sock() and add NULL checks in FOU GRO handlers. [0]: BUG: kernel NULL pointer dereference, address: 0000000000000008 PF: supervisor read access in kernel mode PF: error_code(0x0000) - not-present page PGD 80000001032f4067 P4D 80000001032f4067 PUD 103240067 PMD 0 SMP PTI CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.216-204.855.amzn2.x86_64 #1 Hardware name: Amazon EC2 c5.large/, BIOS 1.0 10/16/2017 RIP: 0010:fou_gro_receive (net/ipv4/fou.c:233) [fou] Code: 41 5f c3 cc cc cc cc e8 e7 2e 69 f4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 49 89 f8 41 54 48 89 f7 48 89 d6 49 8b 80 88 02 00 00 <0f> b6 48 08 0f b7 42 4a 66 25 fd fd 80 cc 02 66 89 42 4a 0f b6 42 RSP: 0018:ffffa330c0003d08 EFLAGS: 00010297 RAX: 0000000000000000 RBX: ffff93d9e3a6b900 RCX: 0000000000000010 RDX: ffff93d9e3a6b900 RSI: ffff93d9e3a6b900 RDI: ffff93dac2e24d08 RBP: ffff93d9e3a6b900 R08: ffff93dacbce6400 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffffb5f369b0 R12: ffff93dacbce6400 R13: ffff93dac2e24d08 R14: 0000000000000000 R15: ffffffffb4edd1c0 FS: 0000000000000000(0000) GS:ffff93daee800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000102140001 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259) ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420) ? no_context (arch/x86/mm/fault.c:752) ? exc_page_fault (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 arch/x86/mm/fault.c:1435 arch/x86/mm/fault.c:1483) ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:571) ? fou_gro_receive (net/ipv4/fou.c:233) [fou] udp_gro_receive (include/linux/netdevice.h:2552 net/ipv4/udp_offload.c:559) udp4_gro_receive (net/ipv4/udp_offload.c:604) inet_gro_receive (net/ipv4/af_inet.c:1549 (discriminator 7)) dev_gro_receive (net/core/dev.c:6035 (discriminator 4)) napi_gro_receive (net/core/dev.c:6170) ena_clean_rx_irq (drivers/amazon/net/ena/ena_netdev.c:1558) [ena] ena_io_poll (drivers/amazon/net/ena/ena_netdev.c:1742) [ena] napi_poll (net/core/dev.c:6847) net_rx_action (net/core/dev.c:6917) __do_softirq (arch/x86/include/asm/jump_label.h:25 include/linux/jump_label.h:200 include/trace/events/irq.h:142 kernel/softirq.c:299) asm_call_irq_on_stack (arch/x86/entry/entry_64.S:809) </IRQ> do_softirq_own_stack (arch/x86/include/asm/irq_stack.h:27 arch/x86/include/asm/irq_stack.h:77 arch/x86/kernel/irq_64.c:77) irq_exit_rcu (kernel/softirq.c:393 kernel/softirq.c:423 kernel/softirq.c:435) common_interrupt (arch/x86/kernel/irq.c:239) asm_common_interrupt (arch/x86/include/asm/idtentry.h:626) RIP: 0010:acpi_idle_do_entry (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 drivers/acpi/processor_idle.c:114 drivers/acpi/processor_idle.c:575) Code: 8b 15 d1 3c c4 02 ed c3 cc cc cc cc 65 48 8b 04 25 40 ef 01 00 48 8b 00 a8 08 75 eb 0f 1f 44 00 00 0f 00 2d d5 09 55 00 fb f4 <fa> c3 cc cc cc cc e9 be fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffffffb5603e58 EFLAGS: 00000246 RAX: 0000000000004000 RBX: ffff93dac0929c00 RCX: ffff93daee833900 RDX: ffff93daee800000 RSI: ffff93d ---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < 231c235d2f7a66f018f172e26ffd47c363f244ef (git)
Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < 4494bccb52ffda22ce5a1163a776d970e6229e08 (git)
Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3 (git)
Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < 1df42be305fe478ded1ee0c1d775f4ece713483b (git)
Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < c46cd6aaca81040deaea3500ba75126963294bd9 (git)
Affected: d92283e338f6d6503b7417536bf3478f466cbc01 , < 7e4196935069947d8b70b09c1660b67b067e75cb (git)
Create a notification for this product.
Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.110 , ≤ 6.1.* (semver)
Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: Fix null-ptr-deref in GRO.\n\nWe observed a null-ptr-deref in fou_gro_receive() while shutting down\na host.  [0]\n\nThe NULL pointer is sk-\u003esk_user_data, and the offset 8 is of protocol\nin struct fou.\n\nWhen fou_release() is called due to netns dismantle or explicit tunnel\nteardown, udp_tunnel_sock_release() sets NULL to sk-\u003esk_user_data.\nThen, the tunnel socket is destroyed after a single RCU grace period.\n\nSo, in-flight udp4_gro_receive() could find the socket and execute the\nFOU GRO handler, where sk-\u003esk_user_data could be NULL.\n\nLet\u0027s use rcu_dereference_sk_user_data() in fou_from_sock() and add NULL\nchecks in FOU GRO handlers.\n\n[0]:\nBUG: kernel NULL pointer dereference, address: 0000000000000008\n PF: supervisor read access in kernel mode\n PF: error_code(0x0000) - not-present page\nPGD 80000001032f4067 P4D 80000001032f4067 PUD 103240067 PMD 0\nSMP PTI\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.216-204.855.amzn2.x86_64 #1\nHardware name: Amazon EC2 c5.large/, BIOS 1.0 10/16/2017\nRIP: 0010:fou_gro_receive (net/ipv4/fou.c:233) [fou]\nCode: 41 5f c3 cc cc cc cc e8 e7 2e 69 f4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 49 89 f8 41 54 48 89 f7 48 89 d6 49 8b 80 88 02 00 00 \u003c0f\u003e b6 48 08 0f b7 42 4a 66 25 fd fd 80 cc 02 66 89 42 4a 0f b6 42\nRSP: 0018:ffffa330c0003d08 EFLAGS: 00010297\nRAX: 0000000000000000 RBX: ffff93d9e3a6b900 RCX: 0000000000000010\nRDX: ffff93d9e3a6b900 RSI: ffff93d9e3a6b900 RDI: ffff93dac2e24d08\nRBP: ffff93d9e3a6b900 R08: ffff93dacbce6400 R09: 0000000000000002\nR10: 0000000000000000 R11: ffffffffb5f369b0 R12: ffff93dacbce6400\nR13: ffff93dac2e24d08 R14: 0000000000000000 R15: ffffffffb4edd1c0\nFS:  0000000000000000(0000) GS:ffff93daee800000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000008 CR3: 0000000102140001 CR4: 00000000007706f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n \u003cIRQ\u003e\n ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)\n ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420)\n ? no_context (arch/x86/mm/fault.c:752)\n ? exc_page_fault (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 arch/x86/mm/fault.c:1435 arch/x86/mm/fault.c:1483)\n ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:571)\n ? fou_gro_receive (net/ipv4/fou.c:233) [fou]\n udp_gro_receive (include/linux/netdevice.h:2552 net/ipv4/udp_offload.c:559)\n udp4_gro_receive (net/ipv4/udp_offload.c:604)\n inet_gro_receive (net/ipv4/af_inet.c:1549 (discriminator 7))\n dev_gro_receive (net/core/dev.c:6035 (discriminator 4))\n napi_gro_receive (net/core/dev.c:6170)\n ena_clean_rx_irq (drivers/amazon/net/ena/ena_netdev.c:1558) [ena]\n ena_io_poll (drivers/amazon/net/ena/ena_netdev.c:1742) [ena]\n napi_poll (net/core/dev.c:6847)\n net_rx_action (net/core/dev.c:6917)\n __do_softirq (arch/x86/include/asm/jump_label.h:25 include/linux/jump_label.h:200 include/trace/events/irq.h:142 kernel/softirq.c:299)\n asm_call_irq_on_stack (arch/x86/entry/entry_64.S:809)\n\u003c/IRQ\u003e\n do_softirq_own_stack (arch/x86/include/asm/irq_stack.h:27 arch/x86/include/asm/irq_stack.h:77 arch/x86/kernel/irq_64.c:77)\n irq_exit_rcu (kernel/softirq.c:393 kernel/softirq.c:423 kernel/softirq.c:435)\n common_interrupt (arch/x86/kernel/irq.c:239)\n asm_common_interrupt (arch/x86/include/asm/idtentry.h:626)\nRIP: 0010:acpi_idle_do_entry (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 drivers/acpi/processor_idle.c:114 drivers/acpi/processor_idle.c:575)\nCode: 8b 15 d1 3c c4 02 ed c3 cc cc cc cc 65 48 8b 04 25 40 ef 01 00 48 8b 00 a8 08 75 eb 0f 1f 44 00 00 0f 00 2d d5 09 55 00 fb f4 \u003cfa\u003e c3 cc cc cc cc e9 be fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00\nRSP: 0018:ffffffffb5603e58 EFLAGS: 00000246\nRAX: 0000000000004000 RBX: ffff93dac0929c00 RCX: ffff93daee833900\nRDX: ffff93daee800000 RSI: ffff93d\n---truncated---"
        }
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        "dateUpdated": "2026-05-11T20:35:52.746Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/231c235d2f7a66f018f172e26ffd47c363f244ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/4494bccb52ffda22ce5a1163a776d970e6229e08"
        },
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          "url": "https://git.kernel.org/stable/c/d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3"
        },
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        },
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          "url": "https://git.kernel.org/stable/c/c46cd6aaca81040deaea3500ba75126963294bd9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e4196935069947d8b70b09c1660b67b067e75cb"
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      ],
      "title": "fou: Fix null-ptr-deref in GRO.",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46763",
    "datePublished": "2024-09-18T07:12:22.666Z",
    "dateReserved": "2024-09-11T15:12:18.272Z",
    "dateUpdated": "2026-05-11T20:35:52.746Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-46763",
      "date": "2026-05-30",
      "epss": "7e-05",
      "percentile": "0.00613"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46763\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-18T08:15:04.613\",\"lastModified\":\"2025-11-03T23:15:59.747\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfou: Fix null-ptr-deref in GRO.\\n\\nWe observed a null-ptr-deref in fou_gro_receive() while shutting down\\na host.  [0]\\n\\nThe NULL pointer is sk-\u003esk_user_data, and the offset 8 is of protocol\\nin struct fou.\\n\\nWhen fou_release() is called due to netns dismantle or explicit tunnel\\nteardown, udp_tunnel_sock_release() sets NULL to sk-\u003esk_user_data.\\nThen, the tunnel socket is destroyed after a single RCU grace period.\\n\\nSo, in-flight udp4_gro_receive() could find the socket and execute the\\nFOU GRO handler, where sk-\u003esk_user_data could be NULL.\\n\\nLet\u0027s use rcu_dereference_sk_user_data() in fou_from_sock() and add NULL\\nchecks in FOU GRO handlers.\\n\\n[0]:\\nBUG: kernel NULL pointer dereference, address: 0000000000000008\\n PF: supervisor read access in kernel mode\\n PF: error_code(0x0000) - not-present page\\nPGD 80000001032f4067 P4D 80000001032f4067 PUD 103240067 PMD 0\\nSMP PTI\\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.216-204.855.amzn2.x86_64 #1\\nHardware name: Amazon EC2 c5.large/, BIOS 1.0 10/16/2017\\nRIP: 0010:fou_gro_receive (net/ipv4/fou.c:233) [fou]\\nCode: 41 5f c3 cc cc cc cc e8 e7 2e 69 f4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 49 89 f8 41 54 48 89 f7 48 89 d6 49 8b 80 88 02 00 00 \u003c0f\u003e b6 48 08 0f b7 42 4a 66 25 fd fd 80 cc 02 66 89 42 4a 0f b6 42\\nRSP: 0018:ffffa330c0003d08 EFLAGS: 00010297\\nRAX: 0000000000000000 RBX: ffff93d9e3a6b900 RCX: 0000000000000010\\nRDX: ffff93d9e3a6b900 RSI: ffff93d9e3a6b900 RDI: ffff93dac2e24d08\\nRBP: ffff93d9e3a6b900 R08: ffff93dacbce6400 R09: 0000000000000002\\nR10: 0000000000000000 R11: ffffffffb5f369b0 R12: ffff93dacbce6400\\nR13: ffff93dac2e24d08 R14: 0000000000000000 R15: ffffffffb4edd1c0\\nFS:  0000000000000000(0000) GS:ffff93daee800000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000000000008 CR3: 0000000102140001 CR4: 00000000007706f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n \u003cIRQ\u003e\\n ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)\\n ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420)\\n ? no_context (arch/x86/mm/fault.c:752)\\n ? exc_page_fault (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 arch/x86/mm/fault.c:1435 arch/x86/mm/fault.c:1483)\\n ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:571)\\n ? fou_gro_receive (net/ipv4/fou.c:233) [fou]\\n udp_gro_receive (include/linux/netdevice.h:2552 net/ipv4/udp_offload.c:559)\\n udp4_gro_receive (net/ipv4/udp_offload.c:604)\\n inet_gro_receive (net/ipv4/af_inet.c:1549 (discriminator 7))\\n dev_gro_receive (net/core/dev.c:6035 (discriminator 4))\\n napi_gro_receive (net/core/dev.c:6170)\\n ena_clean_rx_irq (drivers/amazon/net/ena/ena_netdev.c:1558) [ena]\\n ena_io_poll (drivers/amazon/net/ena/ena_netdev.c:1742) [ena]\\n napi_poll (net/core/dev.c:6847)\\n net_rx_action (net/core/dev.c:6917)\\n __do_softirq (arch/x86/include/asm/jump_label.h:25 include/linux/jump_label.h:200 include/trace/events/irq.h:142 kernel/softirq.c:299)\\n asm_call_irq_on_stack (arch/x86/entry/entry_64.S:809)\\n\u003c/IRQ\u003e\\n do_softirq_own_stack (arch/x86/include/asm/irq_stack.h:27 arch/x86/include/asm/irq_stack.h:77 arch/x86/kernel/irq_64.c:77)\\n irq_exit_rcu (kernel/softirq.c:393 kernel/softirq.c:423 kernel/softirq.c:435)\\n common_interrupt (arch/x86/kernel/irq.c:239)\\n asm_common_interrupt (arch/x86/include/asm/idtentry.h:626)\\nRIP: 0010:acpi_idle_do_entry (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 drivers/acpi/processor_idle.c:114 drivers/acpi/processor_idle.c:575)\\nCode: 8b 15 d1 3c c4 02 ed c3 cc cc cc cc 65 48 8b 04 25 40 ef 01 00 48 8b 00 a8 08 75 eb 0f 1f 44 00 00 0f 00 2d d5 09 55 00 fb f4 \u003cfa\u003e c3 cc cc cc cc e9 be fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00\\nRSP: 0018:ffffffffb5603e58 EFLAGS: 00000246\\nRAX: 0000000000004000 RBX: ffff93dac0929c00 RCX: ffff93daee833900\\nRDX: ffff93daee800000 RSI: ffff93d\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fou: Se ha corregido un null-ptr-deref en GRO. Observamos un null-ptr-deref en fou_gro_receive() al apagar un host. [0] El puntero NULL es sk-\u0026gt;sk_user_data y el desplazamiento 8 es del protocolo en la estructura fou. Cuando se llama a fou_release() debido al desmantelamiento de netns o al desmantelamiento expl\u00edcito del t\u00fanel, udp_tunnel_sock_release() establece NULL en sk-\u0026gt;sk_user_data. Luego, el socket del t\u00fanel se destruye despu\u00e9s de un \u00fanico per\u00edodo de gracia de RCU. Por lo tanto, udp4_gro_receive() en vuelo podr\u00eda encontrar el socket y ejecutar el controlador FOU GRO, donde sk-\u0026gt;sk_user_data podr\u00eda ser NULL. Usemos rcu_dereference_sk_user_data() en fou_from_sock() y agreguemos comprobaciones NULL en los controladores FOU GRO. [0]: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000008 PF: acceso de lectura del supervisor en modo kernel PF: error_code(0x0000) - p\u00e1gina no presente PGD 80000001032f4067 P4D 80000001032f4067 PUD 103240067 PMD 0 SMP PTI CPU: 0 PID: 0 Comm: swapper/0 No contaminado 5.10.216-204.855.amzn2.x86_64 #1 Nombre del hardware: Amazon EC2 c5.large/, BIOS 1.0 16/10/2017 RIP: 0010:fou_gro_receive (net/ipv4/fou.c:233) [fou] C\u00f3digo: 41 5f c3 cc cc cc cc e8 e7 2e 69 f4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 49 89 f8 41 54 48 89 f7 48 89 d6 49 8b 80 88 02 00 00 \u0026lt;0f\u0026gt; b6 48 08 0f b7 42 4a 66 25 fd fd 80 cc 02 66 89 42 4a 0f b6 42 RSP: 0018:ffffa330c0003d08 EFLAGS: 00010297 RAX: 0000000000000000 RBX: ffff93d9e3a6b900 RCX: 0000000000000010 RDX: ffff93d9e3a6b900 RSI: ffff93d9e3a6b900 RDI: ffff93dac2e24d08 RBP: ffff93d9e3a6b900 R08: ffff93dacbce6400 R09: 000000000000002 R10: 000000000000000 R11: ffffffffb5f369b0 R12: ffff93dacbce6400 R13: ffff93dac2e24d08 R14: 0000000000000000 R15: ffffffffb4edd1c0 FS: 0000000000000000(0000) GS:ffff93daee800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000008 CR3: 0000000102140001 CR4: 00000000007706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Seguimiento de llamadas:  ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259) ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420) ? no_context (arch/x86/mm/fault.c:752) ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:571) ? fou_gro_receive (net/ipv4/fou.c:233) [fou] udp_gro_receive (include/linux/netdevice.h:2552 net/ipv4/udp_offload.c:559) udp4_gro_receive (net/ipv4/udp_offload.c:604) inet_gro_receive (net/ipv4/af_inet.c:1549 (discriminador 7)) dev_gro_receive (net/core/dev.c:6035 (discriminador 4)) napi_gro_receive (net/core/dev.c:6170) ena_clean_rx_irq (drivers/amazon/net/ena/ena_netdev.c:1558) [ena] ena_io_poll (controladores/amazon/net/ena/ena_netdev.c:1742) [ena] napi_poll (net/core/dev.c:6847) net_rx_action (net/core/dev.c:6917) __do_softirq (arch/x86/include/asm/jump_label.h:25 include/linux/jump_label.h:200 include/trace/events/irq.h:142 kernel/softirq.c:299) asm_call_irq_on_stack (arch/x86/entry/entry_64.S:809)  do_softirq_own_stack (arch/x86/include/asm/irq_stack.h:27 arch/x86/include/asm/irq_stack.h:77 arch/x86/kernel/irq_64.c:77) irq_exit_rcu (kernel/softirq.c:393 kernel/softirq.c:423 kernel/softirq.c:435) interrupci\u00f3n_com\u00fan (arch/x86/kernel/irq.c:239) interrupci\u00f3n_com\u00fan_asm (arch/x86/include/asm/idtentry.h:626) RIP: 0010:acpi_idle_do_entry (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 drivers/acpi/processor_idle.c:114 drivers/acpi/processor_idle.c:575) C\u00f3digo: 8b 15 d1 3c c4 02 ed c3 cc cc cc cc 65 48 8b 04 25 40 ef 01 00 48 8b 00 a8 08 75 eb 0f 1f 44 00 00 0f 00 2d d5 09 55 00 fb f4  c3 cc cc cc cc e9 ser fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffffffb5603e58 EFLAGS: 00000246 RAX: 0000000000004000 RBX: ffff93dac0929c00 RCX: ffff93daee833900 RDX: ffff93daee800000 RSI: ffff93d ---truncado---\"}],\"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\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.7\",\"versionEndExcluding\":\"5.10.226\",\"matchCriteriaId\":\"25DA6025-A996-4FFF-AF26-946B1769C014\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.167\",\"matchCriteriaId\":\"043405A4-25FE-45D4-A7BB-2A0C3B7D17C1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.110\",\"matchCriteriaId\":\"6B1A95FC-7E7E-428B-BB59-F76640C652AE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.51\",\"matchCriteriaId\":\"E4529134-BAC4-4776-840B-304009E181A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.10\",\"matchCriteriaId\":\"ACDEE48C-137A-4731-90D0-A675865E1BED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1df42be305fe478ded1ee0c1d775f4ece713483b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/231c235d2f7a66f018f172e26ffd47c363f244ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4494bccb52ffda22ce5a1163a776d970e6229e08\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7e4196935069947d8b70b09c1660b67b067e75cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c46cd6aaca81040deaea3500ba75126963294bd9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46763\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T14:43:18.405859Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T14:43:22.471Z\"}}], \"cna\": {\"title\": \"fou: Fix null-ptr-deref in GRO.\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"231c235d2f7a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"4494bccb52ff\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"d7567f098f54\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"1df42be305fe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"c46cd6aaca81\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d92283e338f6\", \"lessThan\": \"7e4196935069\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/fou_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.110\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.51\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/fou_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/231c235d2f7a66f018f172e26ffd47c363f244ef\"}, {\"url\": \"https://git.kernel.org/stable/c/4494bccb52ffda22ce5a1163a776d970e6229e08\"}, {\"url\": \"https://git.kernel.org/stable/c/d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3\"}, {\"url\": \"https://git.kernel.org/stable/c/1df42be305fe478ded1ee0c1d775f4ece713483b\"}, {\"url\": \"https://git.kernel.org/stable/c/c46cd6aaca81040deaea3500ba75126963294bd9\"}, {\"url\": \"https://git.kernel.org/stable/c/7e4196935069947d8b70b09c1660b67b067e75cb\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfou: Fix null-ptr-deref in GRO.\\n\\nWe observed a null-ptr-deref in fou_gro_receive() while shutting down\\na host.  [0]\\n\\nThe NULL pointer is sk-\u003esk_user_data, and the offset 8 is of protocol\\nin struct fou.\\n\\nWhen fou_release() is called due to netns dismantle or explicit tunnel\\nteardown, udp_tunnel_sock_release() sets NULL to sk-\u003esk_user_data.\\nThen, the tunnel socket is destroyed after a single RCU grace period.\\n\\nSo, in-flight udp4_gro_receive() could find the socket and execute the\\nFOU GRO handler, where sk-\u003esk_user_data could be NULL.\\n\\nLet\u0027s use rcu_dereference_sk_user_data() in fou_from_sock() and add NULL\\nchecks in FOU GRO handlers.\\n\\n[0]:\\nBUG: kernel NULL pointer dereference, address: 0000000000000008\\n PF: supervisor read access in kernel mode\\n PF: error_code(0x0000) - not-present page\\nPGD 80000001032f4067 P4D 80000001032f4067 PUD 103240067 PMD 0\\nSMP PTI\\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.216-204.855.amzn2.x86_64 #1\\nHardware name: Amazon EC2 c5.large/, BIOS 1.0 10/16/2017\\nRIP: 0010:fou_gro_receive (net/ipv4/fou.c:233) [fou]\\nCode: 41 5f c3 cc cc cc cc e8 e7 2e 69 f4 0f 1f 80 00 00 00 00 0f 1f 44 00 00 49 89 f8 41 54 48 89 f7 48 89 d6 49 8b 80 88 02 00 00 \u003c0f\u003e b6 48 08 0f b7 42 4a 66 25 fd fd 80 cc 02 66 89 42 4a 0f b6 42\\nRSP: 0018:ffffa330c0003d08 EFLAGS: 00010297\\nRAX: 0000000000000000 RBX: ffff93d9e3a6b900 RCX: 0000000000000010\\nRDX: ffff93d9e3a6b900 RSI: ffff93d9e3a6b900 RDI: ffff93dac2e24d08\\nRBP: ffff93d9e3a6b900 R08: ffff93dacbce6400 R09: 0000000000000002\\nR10: 0000000000000000 R11: ffffffffb5f369b0 R12: ffff93dacbce6400\\nR13: ffff93dac2e24d08 R14: 0000000000000000 R15: ffffffffb4edd1c0\\nFS:  0000000000000000(0000) GS:ffff93daee800000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000000000008 CR3: 0000000102140001 CR4: 00000000007706f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nPKRU: 55555554\\nCall Trace:\\n \u003cIRQ\u003e\\n ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)\\n ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420)\\n ? no_context (arch/x86/mm/fault.c:752)\\n ? exc_page_fault (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 arch/x86/mm/fault.c:1435 arch/x86/mm/fault.c:1483)\\n ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:571)\\n ? fou_gro_receive (net/ipv4/fou.c:233) [fou]\\n udp_gro_receive (include/linux/netdevice.h:2552 net/ipv4/udp_offload.c:559)\\n udp4_gro_receive (net/ipv4/udp_offload.c:604)\\n inet_gro_receive (net/ipv4/af_inet.c:1549 (discriminator 7))\\n dev_gro_receive (net/core/dev.c:6035 (discriminator 4))\\n napi_gro_receive (net/core/dev.c:6170)\\n ena_clean_rx_irq (drivers/amazon/net/ena/ena_netdev.c:1558) [ena]\\n ena_io_poll (drivers/amazon/net/ena/ena_netdev.c:1742) [ena]\\n napi_poll (net/core/dev.c:6847)\\n net_rx_action (net/core/dev.c:6917)\\n __do_softirq (arch/x86/include/asm/jump_label.h:25 include/linux/jump_label.h:200 include/trace/events/irq.h:142 kernel/softirq.c:299)\\n asm_call_irq_on_stack (arch/x86/entry/entry_64.S:809)\\n\u003c/IRQ\u003e\\n do_softirq_own_stack (arch/x86/include/asm/irq_stack.h:27 arch/x86/include/asm/irq_stack.h:77 arch/x86/kernel/irq_64.c:77)\\n irq_exit_rcu (kernel/softirq.c:393 kernel/softirq.c:423 kernel/softirq.c:435)\\n common_interrupt (arch/x86/kernel/irq.c:239)\\n asm_common_interrupt (arch/x86/include/asm/idtentry.h:626)\\nRIP: 0010:acpi_idle_do_entry (arch/x86/include/asm/irqflags.h:49 arch/x86/include/asm/irqflags.h:89 drivers/acpi/processor_idle.c:114 drivers/acpi/processor_idle.c:575)\\nCode: 8b 15 d1 3c c4 02 ed c3 cc cc cc cc 65 48 8b 04 25 40 ef 01 00 48 8b 00 a8 08 75 eb 0f 1f 44 00 00 0f 00 2d d5 09 55 00 fb f4 \u003cfa\u003e c3 cc cc cc cc e9 be fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00\\nRSP: 0018:ffffffffb5603e58 EFLAGS: 00000246\\nRAX: 0000000000004000 RBX: ffff93dac0929c00 RCX: ffff93daee833900\\nRDX: ffff93daee800000 RSI: ffff93d\\n---truncated---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:46:10.387Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46763\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:46:10.387Z\", \"dateReserved\": \"2024-09-11T15:12:18.272Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-18T07:12:22.666Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.