CVE-2024-41040
- Source
- https://cve.org/CVERecord?id=CVE-2024-41040
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-41040.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-41040
- Downstream
- Related
- Published
- 2024-07-29T14:31:53Z
- Modified
- 2026-08-12T03:51:26Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- net/sched: Fix UAF when resolving a clash
- Details
-
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: 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 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41040.json" }- References
-
- https://git.kernel.org/stable/c/26488172b0292bed837b95a006a3f3431d1898c3
- 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/b81a523d54ea689414f67c9fb81a5b917a41ed55
- https://git.kernel.org/stable/c/ef472cc6693b16b202a916482df72f35d94bd69e
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41040.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-41040
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf07c548314776231f0d47d73ec6caa5b17e876e8Fixedb81a523d54ea689414f67c9fb81a5b917a41ed55
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0cc254e5aa37cf05f65bcdcdc0ac5c58010feb33Fixed2b4d68df3f57ea746c430941ba9c03d7d8b5a23fFixed4e71b10a100861fb27d9c5755dfd68f615629faeFixed799a34901b634008db4a7ece3900e2b971d4c932Fixedef472cc6693b16b202a916482df72f35d94bd69eFixed26488172b0292bed837b95a006a3f3431d1898c3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast Affected30822781c89943b6a3ed122324ceb37cea7042a3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.10.43Fixed5.10.222
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.12.10Fixed5.13
Affected versions
v2.*
v3.*
v4.*
v5.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed5.10.222
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.163
- Type
- ECOSYSTEM
- Events
-
Introduced5.13.0Fixed6.1.100
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.6.41
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.9.10