cve-2024-40905
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2024-11-05 09:32
Severity ?
Summary
ipv6: fix possible race in __fib6_drop_pcpu_from()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09e5a5a80e205922151136069e440477d6816914Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2498960dac9b6fc49b6d1574f7cd1a4872744adfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e796c3fefa8b17b30e7252886ae8cffacd2b9efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0bc020592b54a8f3fa2b7f244b6e39e526c2e12Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b01e1c030770ff3b4fe37fc7cc6bca03f594133fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c693698787660c97950bc1f93a8dd19d8307153dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c90af1cced2f669a7b2304584be4ada495eaa0e5Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible race in __fib6_drop_pcpu_from()\n\nsyzbot found a race in __fib6_drop_pcpu_from() [1]\n\nIf compiler reads more than once (*ppcpu_rt),\nsecond read could read NULL, if another cpu clears\nthe value in rt6_get_pcpu_route().\n\nAdd a READ_ONCE() to prevent this race.\n\nAlso add rcu_read_lock()/rcu_read_unlock() because\nwe rely on RCU protection while dereferencing pcpu_rt.\n\n[1]\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]\nCPU: 0 PID: 7543 Comm: kworker/u8:17 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\nWorkqueue: netns cleanup_net\n RIP: 0010:__fib6_drop_pcpu_from.part.0+0x10a/0x370 net/ipv6/ip6_fib.c:984\nCode: f8 48 c1 e8 03 80 3c 28 00 0f 85 16 02 00 00 4d 8b 3f 4d 85 ff 74 31 e8 74 a7 fa f7 49 8d bf 90 00 00 00 48 89 f8 48 c1 e8 03 \u003c80\u003e 3c 28 00 0f 85 1e 02 00 00 49 8b 87 90 00 00 00 48 8b 0c 24 48\nRSP: 0018:ffffc900040df070 EFLAGS: 00010206\nRAX: 0000000000000012 RBX: 0000000000000001 RCX: ffffffff89932e16\nRDX: ffff888049dd1e00 RSI: ffffffff89932d7c RDI: 0000000000000091\nRBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000007\nR10: 0000000000000001 R11: 0000000000000006 R12: ffff88807fa080b8\nR13: fffffbfff1a9a07d R14: ffffed100ff41022 R15: 0000000000000001\nFS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b32c26000 CR3: 000000005d56e000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  __fib6_drop_pcpu_from net/ipv6/ip6_fib.c:966 [inline]\n  fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [inline]\n  fib6_purge_rt+0x7f2/0x9f0 net/ipv6/ip6_fib.c:1038\n  fib6_del_route net/ipv6/ip6_fib.c:1998 [inline]\n  fib6_del+0xa70/0x17b0 net/ipv6/ip6_fib.c:2043\n  fib6_clean_node+0x426/0x5b0 net/ipv6/ip6_fib.c:2205\n  fib6_walk_continue+0x44f/0x8d0 net/ipv6/ip6_fib.c:2127\n  fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2175\n  fib6_clean_tree+0xd7/0x120 net/ipv6/ip6_fib.c:2255\n  __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2271\n  rt6_sync_down_dev net/ipv6/route.c:4906 [inline]\n  rt6_disable_ip+0x7ed/0xa00 net/ipv6/route.c:4911\n  addrconf_ifdown.isra.0+0x117/0x1b40 net/ipv6/addrconf.c:3855\n  addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3778\n  notifier_call_chain+0xb9/0x410 kernel/notifier.c:93\n  call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992\n  call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]\n  call_netdevice_notifiers net/core/dev.c:2044 [inline]\n  dev_close_many+0x333/0x6a0 net/core/dev.c:1585\n  unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11193\n  unregister_netdevice_many net/core/dev.c:11276 [inline]\n  default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11759\n  ops_exit_list+0x128/0x180 net/core/net_namespace.c:178\n  cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640\n  process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231\n  process_scheduled_works kernel/workqueue.c:3312 [inline]\n  worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393\n  kthread+0x2c1/0x3a0 kernel/kthread.c:389\n  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244"
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      "title": "ipv6: fix possible race in __fib6_drop_pcpu_from()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40905",
    "datePublished": "2024-07-12T12:20:45.832Z",
    "dateReserved": "2024-07-12T12:17:45.580Z",
    "dateUpdated": "2024-11-05T09:32:50.695Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-40905\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-12T13:15:13.847\",\"lastModified\":\"2024-09-19T13:16:03.533\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: fix possible race in __fib6_drop_pcpu_from()\\n\\nsyzbot found a race in __fib6_drop_pcpu_from() [1]\\n\\nIf compiler reads more than once (*ppcpu_rt),\\nsecond read could read NULL, if another cpu clears\\nthe value in rt6_get_pcpu_route().\\n\\nAdd a READ_ONCE() to prevent this race.\\n\\nAlso add rcu_read_lock()/rcu_read_unlock() because\\nwe rely on RCU protection while dereferencing pcpu_rt.\\n\\n[1]\\n\\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN PTI\\nKASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]\\nCPU: 0 PID: 7543 Comm: kworker/u8:17 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\\nWorkqueue: netns cleanup_net\\n RIP: 0010:__fib6_drop_pcpu_from.part.0+0x10a/0x370 net/ipv6/ip6_fib.c:984\\nCode: f8 48 c1 e8 03 80 3c 28 00 0f 85 16 02 00 00 4d 8b 3f 4d 85 ff 74 31 e8 74 a7 fa f7 49 8d bf 90 00 00 00 48 89 f8 48 c1 e8 03 \u003c80\u003e 3c 28 00 0f 85 1e 02 00 00 49 8b 87 90 00 00 00 48 8b 0c 24 48\\nRSP: 0018:ffffc900040df070 EFLAGS: 00010206\\nRAX: 0000000000000012 RBX: 0000000000000001 RCX: ffffffff89932e16\\nRDX: ffff888049dd1e00 RSI: ffffffff89932d7c RDI: 0000000000000091\\nRBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000007\\nR10: 0000000000000001 R11: 0000000000000006 R12: ffff88807fa080b8\\nR13: fffffbfff1a9a07d R14: ffffed100ff41022 R15: 0000000000000001\\nFS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000001b32c26000 CR3: 000000005d56e000 CR4: 00000000003526f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n  __fib6_drop_pcpu_from net/ipv6/ip6_fib.c:966 [inline]\\n  fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [inline]\\n  fib6_purge_rt+0x7f2/0x9f0 net/ipv6/ip6_fib.c:1038\\n  fib6_del_route net/ipv6/ip6_fib.c:1998 [inline]\\n  fib6_del+0xa70/0x17b0 net/ipv6/ip6_fib.c:2043\\n  fib6_clean_node+0x426/0x5b0 net/ipv6/ip6_fib.c:2205\\n  fib6_walk_continue+0x44f/0x8d0 net/ipv6/ip6_fib.c:2127\\n  fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2175\\n  fib6_clean_tree+0xd7/0x120 net/ipv6/ip6_fib.c:2255\\n  __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2271\\n  rt6_sync_down_dev net/ipv6/route.c:4906 [inline]\\n  rt6_disable_ip+0x7ed/0xa00 net/ipv6/route.c:4911\\n  addrconf_ifdown.isra.0+0x117/0x1b40 net/ipv6/addrconf.c:3855\\n  addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3778\\n  notifier_call_chain+0xb9/0x410 kernel/notifier.c:93\\n  call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992\\n  call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]\\n  call_netdevice_notifiers net/core/dev.c:2044 [inline]\\n  dev_close_many+0x333/0x6a0 net/core/dev.c:1585\\n  unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11193\\n  unregister_netdevice_many net/core/dev.c:11276 [inline]\\n  default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11759\\n  ops_exit_list+0x128/0x180 net/core/net_namespace.c:178\\n  cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640\\n  process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231\\n  process_scheduled_works kernel/workqueue.c:3312 [inline]\\n  worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393\\n  kthread+0x2c1/0x3a0 kernel/kthread.c:389\\n  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\\n  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv6: corrige posible ejecuci\u00f3n en __fib6_drop_pcpu_from() syzbot encontr\u00f3 una ejecuci\u00f3n en __fib6_drop_pcpu_from() [1] Si el compilador lee m\u00e1s de una vez (*ppcpu_rt), la segunda lectura podr\u00eda leer NULL, si otra CPU borra el valor en rt6_get_pcpu_route(). Agregue un READ_ONCE() para evitar esta ejecuci\u00f3n. Agregue tambi\u00e9n rcu_read_lock()/rcu_read_unlock() porque confiamos en la protecci\u00f3n de RCU al eliminar la referencia a pcpu_rt. [1] Ups: falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref en el rango [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 7543 Comm: trabajador/ u8:17 No contaminado 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/04/2024 Cola de trabajo: netns cleanup_net RIP: 0010:__fib6_drop_pcpu_from.part.0 +0x10a/0x370 net/ipv6/ip6_fib.c:984 C\u00f3digo: f8 48 c1 e8 03 80 3c 28 00 0f 85 16 02 00 00 4d 8b 3f 4d 85 ff 74 31 e8 74 a7 fa f7 49 8d bf 90 00 00 48 89 f8 48 c1 e8 03 \u0026lt;80\u0026gt; 3c 28 00 0f 85 1e 02 00 00 49 8b 87 90 00 00 00 48 8b 0c 24 48 RSP: 0018:ffffc900040df070 EFLAGS: 00010206 X: 0000000000000012 RBX: 0000000000000001 RCX: ffffffff89932e16 RDX: ffff888049dd1e00 RSI: ffffffff89932d7c RDI: 0000000000000091 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000007 R10: 0000001 R11: 0000000000000006 R12: ffff88807fa080b8 R13: ffffbfff1a9a07d R14: ffffed100ff41022 R15: 0000000000000001 FS: 0000000000000000(00 00) GS:ffff8880b9200000(0000) knlGS:0000000000000000CS : 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001B32C26000 CR3: 000000005D56E000 CR4: 00000000003526F0 DR0: 00000000000000000000000000000000000000000000000000000000SET 0000000000FFFE0FF0 DR7: 000000000000000400 TRACE DE LLAMADA:  __fib6_drop_pcpu_from net/ipv6/ip6_fib .c:966 [en l\u00ednea] fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1027 [en l\u00ednea] fib6_purge_rt+0x7f2/0x9f0 net/ipv6/ip6_fib.c:1038 fib6_del_route net/ipv6/ip6_fib.c:1998 [en l\u00ednea] fib6_del+0xa70 /0x17b0 net/ipv6/ip6_fib.c:2043 fib6_clean_node+0x426/0x5b0 net/ipv6/ip6_fib.c:2205 fib6_walk_continue+0x44f/0x8d0 net/ipv6/ip6_fib.c:2127 fib6_walk+0x182/0x370 /ip6_fib. c:2175 fib6_clean_tree+0xd7/0x120 net/ipv6/ip6_fib.c:2255 __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2271 rt6_sync_down_dev net/ipv6/route.c:4906 [en l\u00ednea] /0xa00 neto /ipv6/route.c:4911 addrconf_ifdown.isra.0+0x117/0x1b40 net/ipv6/addrconf.c:3855 addrconf_notify+0x223/0x19e0 net/ipv6/addrconf.c:3778 notifier_call_chain+0xb9/0x410 kernel/notifier.c :93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992 call_netdevice_notifiers_extack net/core/dev.c:2030 [en l\u00ednea] call_netdevice_notifiers net/core/dev.c:2044 [en l\u00ednea] dev_close_many+0x333/0x6a0 net/core /dev.c:1585 unregister_netdevice_many_notify+0x46d/0x19f0 net/core/dev.c:11193 unregister_netdevice_many net/core/dev.c:11276 [en l\u00ednea] default_device_exit_batch+0x85b/0xae0 net/core/dev.c:11759 ops_exit_list+0x 128 /0x180 net/core/net_namespace.c:178 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640 Process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 Process_scheduled_works kernel/workqueue.c:3312 [en l\u00ednea] work_thread+ 0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64 .S:244\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.0,\"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\":\"4.2\",\"versionEndExcluding\":\"5.4.279\",\"matchCriteriaId\":\"802905B7-3C3C-4770-AD1D-F0B2C1CE526F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.221\",\"matchCriteriaId\":\"659E1520-6345-41AF-B893-A7C0647585A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.162\",\"matchCriteriaId\":\"10A39ACC-3005-40E8-875C-98A372D1FFD5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.95\",\"matchCriteriaId\":\"D435765D-2766-44F5-B319-F713A13E35CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.35\",\"matchCriteriaId\":\"6F019D15-84C0-416B-8C57-7F51B68992F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.6\",\"matchCriteriaId\":\"0ABBBA1D-F79D-4BDB-AA41-D1EDCC4A6975\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"2EBB4392-5FA6-4DA9-9772-8F9C750109FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"331C2F14-12C7-45D5-893D-8C52EE38EA10\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09e5a5a80e205922151136069e440477d6816914\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2498960dac9b6fc49b6d1574f7cd1a4872744adf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7e796c3fefa8b17b30e7252886ae8cffacd2b9ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a0bc020592b54a8f3fa2b7f244b6e39e526c2e12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b01e1c030770ff3b4fe37fc7cc6bca03f594133f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c693698787660c97950bc1f93a8dd19d8307153d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c90af1cced2f669a7b2304584be4ada495eaa0e5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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