Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f07c548314776231f0d47d73ec6caa5b17e876e8 before b81a523d54ea689414f67c9fb81a5b917a41ed55; affected 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 before 2b4d68df3f57ea746c430941ba9c03d7d8b5a23f; affected 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 before 4e71b10a100861fb27d9c5755dfd68f615629fae; affected 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 before 799a34901b634008db4a7ece3900e2b971d4c932; affected 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 before ef472cc6693b16b202a916482df72f35d94bd69e; affected 0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33 before 26488172b0292bed837b95a006a3f3431d1898c3; affected 30822781c89943b6a3ed122324ceb37cea7042a3; affected 5.10.43 before 5.10.222; affected 5.12.10 before 5.13 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 5.10.222 through 5.10.*; unaffected 5.15.163 through 5.15.*; unaffected 6.1.100 through 6.1.*; unaffected 6.6.41 through 6.6.*; unaffected 6.9.10 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b81a523d54ea689414f67c9fb81a5b917a41ed55
- https://git.kernel.org/stable/c/2b4d68df3f57ea746c430941ba9c03d7d8b5a23f
- https://git.kernel.org/stable/c/4e71b10a100861fb27d9c5755dfd68f615629fae
- https://git.kernel.org/stable/c/799a34901b634008db4a7ece3900e2b971d4c932
- https://git.kernel.org/stable/c/ef472cc6693b16b202a916482df72f35d94bd69e
- https://git.kernel.org/stable/c/26488172b0292bed837b95a006a3f3431d1898c3
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/b81a523d54ea689414f67c9fb81a5b917a41ed55
- https://git.kernel.org/stable/c/2b4d68df3f57ea746c430941ba9c03d7d8b5a23f
- https://git.kernel.org/stable/c/4e71b10a100861fb27d9c5755dfd68f615629fae
- https://git.kernel.org/stable/c/799a34901b634008db4a7ece3900e2b971d4c932
- https://git.kernel.org/stable/c/ef472cc6693b16b202a916482df72f35d94bd69e
- https://git.kernel.org/stable/c/26488172b0292bed837b95a006a3f3431d1898c3
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
No English description supplied.
No references supplied.