CVE-2024-41040 (GCVE-0-2024-41040)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:31 – Updated: 2025-11-03 21:59
VLAI?
Title
net/sched: Fix UAF when resolving a clash
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix UAF when resolving a clash KASAN reports the following UAF: BUG: KASAN: slab-use-after-free in tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct] Read of size 1 at addr ffff888c07603600 by task handler130/6469 Call Trace: <IRQ> dump_stack_lvl+0x48/0x70 print_address_description.constprop.0+0x33/0x3d0 print_report+0xc0/0x2b0 kasan_report+0xd0/0x120 __asan_load1+0x6c/0x80 tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct] tcf_ct_act+0x886/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 fl_classify+0x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c/0x3c0 sch_handle_ingress.constprop.0+0x2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25/0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30c/0x5c0 __do_softirq+0x14f/0x491 __irq_exit_rcu+0x82/0xc0 irq_exit_rcu+0xe/0x20 common_interrupt+0xa1/0xb0 </IRQ> <TASK> asm_common_interrupt+0x27/0x40 Allocated by task 6469: kasan_save_stack+0x38/0x70 kasan_set_track+0x25/0x40 kasan_save_alloc_info+0x1e/0x40 __kasan_krealloc+0x133/0x190 krealloc+0xaa/0x130 nf_ct_ext_add+0xed/0x230 [nf_conntrack] tcf_ct_act+0x1095/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 fl_classify+0x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c/0x3c0 sch_handle_ingress.constprop.0+0x2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25/0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30c/0x5c0 __do_softirq+0x14f/0x491 Freed by task 6469: kasan_save_stack+0x38/0x70 kasan_set_track+0x25/0x40 kasan_save_free_info+0x2b/0x60 ____kasan_slab_free+0x180/0x1f0 __kasan_slab_free+0x12/0x30 slab_free_freelist_hook+0xd2/0x1a0 __kmem_cache_free+0x1a2/0x2f0 kfree+0x78/0x120 nf_conntrack_free+0x74/0x130 [nf_conntrack] nf_ct_destroy+0xb2/0x140 [nf_conntrack] __nf_ct_resolve_clash+0x529/0x5d0 [nf_conntrack] nf_ct_resolve_clash+0xf6/0x490 [nf_conntrack] __nf_conntrack_confirm+0x2c6/0x770 [nf_conntrack] tcf_ct_act+0x12ad/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 fl_classify+0x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c/0x3c0 sch_handle_ingress.constprop.0+0x2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25/0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30c/0x5c0 __do_softirq+0x14f/0x491 The ct may be dropped if a clash has been resolved but is still passed to the tcf_ct_flow_table_process_conn function for further usage. This issue can be fixed by retrieving ct from skb again after confirming conntrack.
Severity ?
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: f07c548314776231f0d47d73ec6caa5b17e876e8 , < b81a523d54ea689414f67c9fb81a5b917a41ed55 (git)
Affected: 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 , < 2b4d68df3f57ea746c430941ba9c03d7d8b5a23f (git)
Affected: 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 , < 4e71b10a100861fb27d9c5755dfd68f615629fae (git)
Affected: 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 , < 799a34901b634008db4a7ece3900e2b971d4c932 (git)
Affected: 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 , < ef472cc6693b16b202a916482df72f35d94bd69e (git)
Affected: 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 , < 26488172b0292bed837b95a006a3f3431d1898c3 (git)
Affected: 30822781c89943b6a3ed122324ceb37cea7042a3 (git)
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    Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.100 , ≤ 6.1.* (semver)
Unaffected: 6.6.41 , ≤ 6.6.* (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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\"4e71b10a1008\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0cc254e5aa37\", \"lessThan\": \"799a34901b63\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0cc254e5aa37\", \"lessThan\": \"ef472cc6693b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0cc254e5aa37\", \"lessThan\": \"26488172b029\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/act_ct.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.222\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.100\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.41\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/act_ct.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b81a523d54ea689414f67c9fb81a5b917a41ed55\"}, {\"url\": \"https://git.kernel.org/stable/c/2b4d68df3f57ea746c430941ba9c03d7d8b5a23f\"}, {\"url\": \"https://git.kernel.org/stable/c/4e71b10a100861fb27d9c5755dfd68f615629fae\"}, {\"url\": \"https://git.kernel.org/stable/c/799a34901b634008db4a7ece3900e2b971d4c932\"}, {\"url\": \"https://git.kernel.org/stable/c/ef472cc6693b16b202a916482df72f35d94bd69e\"}, {\"url\": \"https://git.kernel.org/stable/c/26488172b0292bed837b95a006a3f3431d1898c3\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: Fix UAF when resolving a clash\\n\\nKASAN reports the following UAF:\\n\\n BUG: KASAN: slab-use-after-free in tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]\\n Read of size 1 at addr ffff888c07603600 by task handler130/6469\\n\\n Call Trace:\\n  \u003cIRQ\u003e\\n  dump_stack_lvl+0x48/0x70\\n  print_address_description.constprop.0+0x33/0x3d0\\n  print_report+0xc0/0x2b0\\n  kasan_report+0xd0/0x120\\n  __asan_load1+0x6c/0x80\\n  tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]\\n  tcf_ct_act+0x886/0x1350 [act_ct]\\n  tcf_action_exec+0xf8/0x1f0\\n  fl_classify+0x355/0x360 [cls_flower]\\n  __tcf_classify+0x1fd/0x330\\n  tcf_classify+0x21c/0x3c0\\n  sch_handle_ingress.constprop.0+0x2c5/0x500\\n  __netif_receive_skb_core.constprop.0+0xb25/0x1510\\n  __netif_receive_skb_list_core+0x220/0x4c0\\n  netif_receive_skb_list_internal+0x446/0x620\\n  napi_complete_done+0x157/0x3d0\\n  gro_cell_poll+0xcf/0x100\\n  __napi_poll+0x65/0x310\\n  net_rx_action+0x30c/0x5c0\\n  __do_softirq+0x14f/0x491\\n  __irq_exit_rcu+0x82/0xc0\\n  irq_exit_rcu+0xe/0x20\\n  common_interrupt+0xa1/0xb0\\n  \u003c/IRQ\u003e\\n  \u003cTASK\u003e\\n  asm_common_interrupt+0x27/0x40\\n\\n Allocated by task 6469:\\n  kasan_save_stack+0x38/0x70\\n  kasan_set_track+0x25/0x40\\n  kasan_save_alloc_info+0x1e/0x40\\n  __kasan_krealloc+0x133/0x190\\n  krealloc+0xaa/0x130\\n  nf_ct_ext_add+0xed/0x230 [nf_conntrack]\\n  tcf_ct_act+0x1095/0x1350 [act_ct]\\n  tcf_action_exec+0xf8/0x1f0\\n  fl_classify+0x355/0x360 [cls_flower]\\n  __tcf_classify+0x1fd/0x330\\n  tcf_classify+0x21c/0x3c0\\n  sch_handle_ingress.constprop.0+0x2c5/0x500\\n  __netif_receive_skb_core.constprop.0+0xb25/0x1510\\n  __netif_receive_skb_list_core+0x220/0x4c0\\n  netif_receive_skb_list_internal+0x446/0x620\\n  napi_complete_done+0x157/0x3d0\\n  gro_cell_poll+0xcf/0x100\\n  __napi_poll+0x65/0x310\\n  net_rx_action+0x30c/0x5c0\\n  __do_softirq+0x14f/0x491\\n\\n Freed by task 6469:\\n  kasan_save_stack+0x38/0x70\\n  kasan_set_track+0x25/0x40\\n  kasan_save_free_info+0x2b/0x60\\n  ____kasan_slab_free+0x180/0x1f0\\n  __kasan_slab_free+0x12/0x30\\n  slab_free_freelist_hook+0xd2/0x1a0\\n  __kmem_cache_free+0x1a2/0x2f0\\n  kfree+0x78/0x120\\n  nf_conntrack_free+0x74/0x130 [nf_conntrack]\\n  nf_ct_destroy+0xb2/0x140 [nf_conntrack]\\n  __nf_ct_resolve_clash+0x529/0x5d0 [nf_conntrack]\\n  nf_ct_resolve_clash+0xf6/0x490 [nf_conntrack]\\n  __nf_conntrack_confirm+0x2c6/0x770 [nf_conntrack]\\n  tcf_ct_act+0x12ad/0x1350 [act_ct]\\n  tcf_action_exec+0xf8/0x1f0\\n  fl_classify+0x355/0x360 [cls_flower]\\n  __tcf_classify+0x1fd/0x330\\n  tcf_classify+0x21c/0x3c0\\n  sch_handle_ingress.constprop.0+0x2c5/0x500\\n  __netif_receive_skb_core.constprop.0+0xb25/0x1510\\n  __netif_receive_skb_list_core+0x220/0x4c0\\n  netif_receive_skb_list_internal+0x446/0x620\\n  napi_complete_done+0x157/0x3d0\\n  gro_cell_poll+0xcf/0x100\\n  __napi_poll+0x65/0x310\\n  net_rx_action+0x30c/0x5c0\\n  __do_softirq+0x14f/0x491\\n\\nThe ct may be dropped if a clash has been resolved but is still passed to\\nthe tcf_ct_flow_table_process_conn function for further usage. This issue\\ncan be fixed by retrieving ct from skb again after confirming conntrack.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:35:30.145Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41040\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:35:30.145Z\", \"dateReserved\": \"2024-07-12T12:17:45.621Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T14:31:53.853Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.


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