Vulnerability-Lookup

FKIE_CVE-2023-54216

Vulnerability from fkie_nvd - Published: 2025-12-30 13:16 - Updated: 2026-10-28 19:10

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: TC, Fix using eswitch mapping in nic mode Cited patch is using the eswitch object mapping pool while in nic mode where it isn't initialized. This results in the trace below [0]. Fix that by using either nic or eswitch object mapping pool depending if eswitch is enabled or not. [0]: [ 826.446057] ================================================================== [ 826.446729] BUG: KASAN: slab-use-after-free in mlx5_add_flow_rules+0x30/0x490 [mlx5_core] [ 826.447515] Read of size 8 at addr ffff888194485830 by task tc/6233 [ 826.448243] CPU: 16 PID: 6233 Comm: tc Tainted: G W 6.3.0-rc6+ #1 [ 826.448890] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 826.449785] Call Trace: [ 826.450052] <TASK> [ 826.450302] dump_stack_lvl+0x33/0x50 [ 826.450650] print_report+0xc2/0x610 [ 826.450998] ? __virt_addr_valid+0xb1/0x130 [ 826.451385] ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core] [ 826.451935] kasan_report+0xae/0xe0 [ 826.452276] ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core] [ 826.452829] mlx5_add_flow_rules+0x30/0x490 [mlx5_core] [ 826.453368] ? __kmalloc_node+0x5a/0x120 [ 826.453733] esw_add_restore_rule+0x20f/0x270 [mlx5_core] [ 826.454288] ? mlx5_eswitch_add_send_to_vport_meta_rule+0x260/0x260 [mlx5_core] [ 826.455011] ? mutex_unlock+0x80/0xd0 [ 826.455361] ? __mutex_unlock_slowpath.constprop.0+0x210/0x210 [ 826.455862] ? mapping_add+0x2cb/0x440 [mlx5_core] [ 826.456425] mlx5e_tc_action_miss_mapping_get+0x139/0x180 [mlx5_core] [ 826.457058] ? mlx5e_tc_update_skb_nic+0xb0/0xb0 [mlx5_core] [ 826.457636] ? __kasan_kmalloc+0x77/0x90 [ 826.458000] ? __kmalloc+0x57/0x120 [ 826.458336] mlx5_tc_ct_flow_offload+0x325/0xe40 [mlx5_core] [ 826.458916] ? ct_kernel_enter.constprop.0+0x48/0xa0 [ 826.459360] ? mlx5_tc_ct_parse_action+0xf0/0xf0 [mlx5_core] [ 826.459933] ? mlx5e_mod_hdr_attach+0x491/0x520 [mlx5_core] [ 826.460507] ? mlx5e_mod_hdr_get+0x12/0x20 [mlx5_core] [ 826.461046] ? mlx5e_tc_attach_mod_hdr+0x154/0x170 [mlx5_core] [ 826.461635] mlx5e_configure_flower+0x969/0x2110 [mlx5_core] [ 826.462217] ? _raw_spin_lock_bh+0x85/0xe0 [ 826.462597] ? __mlx5e_add_fdb_flow+0x750/0x750 [mlx5_core] [ 826.463163] ? kasan_save_stack+0x2e/0x40 [ 826.463534] ? down_read+0x115/0x1b0 [ 826.463878] ? down_write_killable+0x110/0x110 [ 826.464288] ? tc_setup_action.part.0+0x9f/0x3b0 [ 826.464701] ? mlx5e_is_uplink_rep+0x4c/0x90 [mlx5_core] [ 826.465253] ? mlx5e_tc_reoffload_flows_work+0x130/0x130 [mlx5_core] [ 826.465878] tc_setup_cb_add+0x112/0x250 [ 826.466247] fl_hw_replace_filter+0x230/0x310 [cls_flower] [ 826.466724] ? fl_hw_destroy_filter+0x1a0/0x1a0 [cls_flower] [ 826.467212] fl_change+0x14e1/0x2030 [cls_flower] [ 826.467636] ? sock_def_readable+0x89/0x120 [ 826.468019] ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower] [ 826.468509] ? kasan_unpoison+0x23/0x50 [ 826.468873] ? get_random_u16+0x180/0x180 [ 826.469244] ? __radix_tree_lookup+0x2b/0x130 [ 826.469640] ? fl_get+0x7b/0x140 [cls_flower] [ 826.470042] ? fl_mask_put+0x200/0x200 [cls_flower] [ 826.470478] ? __mutex_unlock_slowpath.constprop.0+0x210/0x210 [ 826.470973] ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower] [ 826.471427] tc_new_tfilter+0x644/0x1050 [ 826.471795] ? tc_get_tfilter+0x860/0x860 [ 826.472170] ? __thaw_task+0x130/0x130 [ 826.472525] ? arch_stack_walk+0x98/0xf0 [ 826.472892] ? cap_capable+0x9f/0xd0 [ 826.473235] ? security_capable+0x47/0x60 [ 826.473608] rtnetlink_rcv_msg+0x1d5/0x550 [ 826.473985] ? rtnl_calcit.isra.0+0x1f0/0x1f0 [ 826.474383] ? __stack_depot_save+0x35/0x4c0 [ 826.474779] ? kasan_save_stack+0x2e/0x40 [ 826.475149] ? kasan_save_stack+0x1e/0x40 [ 826.475518] ? __kasan_record_aux_stack+0x9f/0xb0 [ 826.475939] ? task_work_add+0x77/0x1c0 [ 826.476305] netlink_rcv_skb+0xe0/0x210 ---truncated---

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4150441c010dec36abc389828e2e4758bd8ad4b3
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dfa1e46d6093831b9d49f0f350227a1d13644a2f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4150441c010dec36abc389828e2e4758bd8ad4b3",
              "status": "affected",
              "version": "6702782845a5bf381a19b204c369e63420041665",
              "versionType": "git"
            },
            {
              "lessThan": "dfa1e46d6093831b9d49f0f350227a1d13644a2f",
              "status": "affected",
              "version": "6702782845a5bf381a19b204c369e63420041665",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: TC, Fix using eswitch mapping in nic mode\n\nCited patch is using the eswitch object mapping pool while\nin nic mode where it isn\u0027t initialized. This results in the\ntrace below [0].\n\nFix that by using either nic or eswitch object mapping pool\ndepending if eswitch is enabled or not.\n\n[0]:\n[  826.446057] ==================================================================\n[  826.446729] BUG: KASAN: slab-use-after-free in mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.447515] Read of size 8 at addr ffff888194485830 by task tc/6233\n\n[  826.448243] CPU: 16 PID: 6233 Comm: tc Tainted: G        W          6.3.0-rc6+ #1\n[  826.448890] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[  826.449785] Call Trace:\n[  826.450052]  \u003cTASK\u003e\n[  826.450302]  dump_stack_lvl+0x33/0x50\n[  826.450650]  print_report+0xc2/0x610\n[  826.450998]  ? __virt_addr_valid+0xb1/0x130\n[  826.451385]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.451935]  kasan_report+0xae/0xe0\n[  826.452276]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.452829]  mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.453368]  ? __kmalloc_node+0x5a/0x120\n[  826.453733]  esw_add_restore_rule+0x20f/0x270 [mlx5_core]\n[  826.454288]  ? mlx5_eswitch_add_send_to_vport_meta_rule+0x260/0x260 [mlx5_core]\n[  826.455011]  ? mutex_unlock+0x80/0xd0\n[  826.455361]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.455862]  ? mapping_add+0x2cb/0x440 [mlx5_core]\n[  826.456425]  mlx5e_tc_action_miss_mapping_get+0x139/0x180 [mlx5_core]\n[  826.457058]  ? mlx5e_tc_update_skb_nic+0xb0/0xb0 [mlx5_core]\n[  826.457636]  ? __kasan_kmalloc+0x77/0x90\n[  826.458000]  ? __kmalloc+0x57/0x120\n[  826.458336]  mlx5_tc_ct_flow_offload+0x325/0xe40 [mlx5_core]\n[  826.458916]  ? ct_kernel_enter.constprop.0+0x48/0xa0\n[  826.459360]  ? mlx5_tc_ct_parse_action+0xf0/0xf0 [mlx5_core]\n[  826.459933]  ? mlx5e_mod_hdr_attach+0x491/0x520 [mlx5_core]\n[  826.460507]  ? mlx5e_mod_hdr_get+0x12/0x20 [mlx5_core]\n[  826.461046]  ? mlx5e_tc_attach_mod_hdr+0x154/0x170 [mlx5_core]\n[  826.461635]  mlx5e_configure_flower+0x969/0x2110 [mlx5_core]\n[  826.462217]  ? _raw_spin_lock_bh+0x85/0xe0\n[  826.462597]  ? __mlx5e_add_fdb_flow+0x750/0x750 [mlx5_core]\n[  826.463163]  ? kasan_save_stack+0x2e/0x40\n[  826.463534]  ? down_read+0x115/0x1b0\n[  826.463878]  ? down_write_killable+0x110/0x110\n[  826.464288]  ? tc_setup_action.part.0+0x9f/0x3b0\n[  826.464701]  ? mlx5e_is_uplink_rep+0x4c/0x90 [mlx5_core]\n[  826.465253]  ? mlx5e_tc_reoffload_flows_work+0x130/0x130 [mlx5_core]\n[  826.465878]  tc_setup_cb_add+0x112/0x250\n[  826.466247]  fl_hw_replace_filter+0x230/0x310 [cls_flower]\n[  826.466724]  ? fl_hw_destroy_filter+0x1a0/0x1a0 [cls_flower]\n[  826.467212]  fl_change+0x14e1/0x2030 [cls_flower]\n[  826.467636]  ? sock_def_readable+0x89/0x120\n[  826.468019]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.468509]  ? kasan_unpoison+0x23/0x50\n[  826.468873]  ? get_random_u16+0x180/0x180\n[  826.469244]  ? __radix_tree_lookup+0x2b/0x130\n[  826.469640]  ? fl_get+0x7b/0x140 [cls_flower]\n[  826.470042]  ? fl_mask_put+0x200/0x200 [cls_flower]\n[  826.470478]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.470973]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.471427]  tc_new_tfilter+0x644/0x1050\n[  826.471795]  ? tc_get_tfilter+0x860/0x860\n[  826.472170]  ? __thaw_task+0x130/0x130\n[  826.472525]  ? arch_stack_walk+0x98/0xf0\n[  826.472892]  ? cap_capable+0x9f/0xd0\n[  826.473235]  ? security_capable+0x47/0x60\n[  826.473608]  rtnetlink_rcv_msg+0x1d5/0x550\n[  826.473985]  ? rtnl_calcit.isra.0+0x1f0/0x1f0\n[  826.474383]  ? __stack_depot_save+0x35/0x4c0\n[  826.474779]  ? kasan_save_stack+0x2e/0x40\n[  826.475149]  ? kasan_save_stack+0x1e/0x40\n[  826.475518]  ? __kasan_record_aux_stack+0x9f/0xb0\n[  826.475939]  ? task_work_add+0x77/0x1c0\n[  826.476305]  netlink_rcv_skb+0xe0/0x210\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/mlx5e: TC, Correcci\u00f3n del uso del mapeo de eswitch en modo nic\n\nEl parche citado est\u00e1 utilizando el pool de mapeo de objetos de eswitch mientras est\u00e1 en modo nic donde no est\u00e1 inicializado. Esto resulta en el rastreo a continuaci\u00f3n [0].\n\nCorrija eso utilizando el pool de mapeo de objetos de nic o de eswitch dependiendo de si eswitch est\u00e1 habilitado o no.\n\n[0]:\n[  826.446057] ==================================================================\n[  826.446729] BUG: KASAN: slab-uso despu\u00e9s de liberaci\u00f3n in mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.447515] Read of size 8 at addr ffff888194485830 by task tc/6233\n\n[  826.448243] CPU: 16 PID: 6233 Comm: tc Tainted: G        W          6.3.0-rc6+ #1\n[  826.448890] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[  826.449785] Call Trace:\n[  826.450052]  [TASK]\n[  826.450302]  dump_stack_lvl+0x33/0x50\n[  826.450650]  print_report+0xc2/0x610\n[  826.450998]  ? __virt_addr_valid+0xb1/0x130\n[  826.451385]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.451935]  kasan_report+0xae/0xe0\n[  826.452276]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.452829]  mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.453368]  ? __kmalloc_node+0x5a/0x120\n[  826.453733]  esw_add_restore_rule+0x20f/0x270 [mlx5_core]\n[  826.454288]  ? mlx5_eswitch_add_send_to_vport_meta_rule+0x260/0x260 [mlx5_core]\n[  826.455011]  ? mutex_unlock+0x80/0xd0\n[  826.455361]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.455862]  ? mapping_add+0x2cb/0x440 [mlx5_core]\n[  826.456425]  mlx5e_tc_action_miss_mapping_get+0x139/0x180 [mlx5_core]\n[  826.457058]  ? mlx5e_tc_update_skb_nic+0xb0/0xb0 [mlx5_core]\n[  826.457636]  ? __kasan_kmalloc+0x77/0x90\n[  826.458000]  ? __kmalloc+0x57/0x120\n[  826.458336]  mlx5_tc_ct_flow_offload+0x325/0xe40 [mlx5_core]\n[  826.458916]  ? ct_kernel_enter.constprop.0+0x48/0xa0\n[  826.459360]  ? mlx5_tc_ct_parse_action+0xf0/0xf0 [mlx5_core]\n[  826.459933]  ? mlx5e_mod_hdr_attach+0x491/0x520 [mlx5_core]\n[  826.460507]  ? mlx5e_mod_hdr_get+0x12/0x20 [mlx5_core]\n[  826.461046]  ? mlx5e_tc_attach_mod_hdr+0x154/0x170 [mlx5_core]\n[  826.461635]  mlx5e_configure_flower+0x969/0x2110 [mlx5_core]\n[  826.462217]  ? _raw_spin_lock_bh+0x85/0xe0\n[  826.462597]  ? __mlx5e_add_fdb_flow+0x750/0x750 [mlx5_core]\n[  826.463163]  ? kasan_save_stack+0x2e/0x40\n[  826.463534]  ? down_read+0x115/0x1b0\n[  826.463878]  ? down_write_killable+0x110/0x110\n[  826.464288]  ? tc_setup_action.part.0+0x9f/0x3b0\n[  826.464701]  ? mlx5e_is_uplink_rep+0x4c/0x90 [mlx5_core]\n[  826.465253]  ? mlx5e_tc_reoffload_flows_work+0x130/0x130 [mlx5_core]\n[  826.465878]  tc_setup_cb_add+0x112/0x250\n[  826.466247]  fl_hw_replace_filter+0x230/0x310 [cls_flower]\n[  826.466724]  ? fl_hw_destroy_filter+0x1a0/0x1a0 [cls_flower]\n[  826.467212]  fl_change+0x14e1/0x2030 [cls_flower]\n[  826.467636]  ? sock_def_readable+0x89/0x120\n[  826.468019]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.468509]  ? kasan_unpoison+0x23/0x50\n[  826.468873]  ? get_random_u16+0x180/0x180\n[  826.469244]  ? __radix_tree_lookup+0x2b/0x130\n[  826.469640]  ? fl_get+0x7b/0x140 [cls_flower]\n[  826.470042]  ? fl_mask_put+0x200/0x200 [cls_flower]\n[  826.470478]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.470973]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.471427]  tc_new_tfilter+0x644/0x1050\n[  826.471795]  ? tc_get_tfilter+0x860/0x860\n[  826.472170]  ? __thaw_task+0x130/0x130\n[  826.472525]  ? arch_stack_walk+0x98/0xf0\n[  826.472892]  ? cap_capable+0x9f/0xd0\n[  826.473235]  ? security_capable+0x47/0x60\n[  826.473608]  rtnetlink_rcv_msg+0x1d5/0x550\n[  826.473985]  ? rtnl_calcit.isra.0+0x1f0/0x1f0\n[  826.474383]  ? __stack_depot_save+0x35/0x4c0\n[  826.474779]  ? kasan_save_stack+0x2e/0x40\n[  826.475149]  ? kasan_save_stack+0x1e/0x40\n[  826.475518]  ? __kasan_record_aux_stack+0x9f/0xb0\n[  826.475939]  ? task_work_add+0x77/0x1c0\n[  826.476305]  netlink_rcv_skb+0xe0/0x210\n---truncated---"
    }
  ],
  "id": "CVE-2023-54216",
  "lastModified": "2026-10-28T19:10:00.193",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-12-30T13:16:09.850",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4150441c010dec36abc389828e2e4758bd8ad4b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfa1e46d6093831b9d49f0f350227a1d13644a2f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}

CVE-2023-54216 (GCVE-0-2023-54216)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2026-08-05 09:18

Title

net/mlx5e: TC, Fix using eswitch mapping in nic mode

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/4150441c010dec36a…
https://git.kernel.org/stable/c/dfa1e46d6093831b9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6702782845a5bf381a19b204c369e63420041665 , < 4150441c010dec36abc389828e2e4758bd8ad4b3 (git) Affected: 6702782845a5bf381a19b204c369e63420041665 , < dfa1e46d6093831b9d49f0f350227a1d13644a2f (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.3.6 , ≤ 6.3.* (semver) Unaffected: 6.4 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4150441c010dec36abc389828e2e4758bd8ad4b3",
              "status": "affected",
              "version": "6702782845a5bf381a19b204c369e63420041665",
              "versionType": "git"
            },
            {
              "lessThan": "dfa1e46d6093831b9d49f0f350227a1d13644a2f",
              "status": "affected",
              "version": "6702782845a5bf381a19b204c369e63420041665",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3.6",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: TC, Fix using eswitch mapping in nic mode\n\nCited patch is using the eswitch object mapping pool while\nin nic mode where it isn\u0027t initialized. This results in the\ntrace below [0].\n\nFix that by using either nic or eswitch object mapping pool\ndepending if eswitch is enabled or not.\n\n[0]:\n[  826.446057] ==================================================================\n[  826.446729] BUG: KASAN: slab-use-after-free in mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.447515] Read of size 8 at addr ffff888194485830 by task tc/6233\n\n[  826.448243] CPU: 16 PID: 6233 Comm: tc Tainted: G        W          6.3.0-rc6+ #1\n[  826.448890] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n[  826.449785] Call Trace:\n[  826.450052]  \u003cTASK\u003e\n[  826.450302]  dump_stack_lvl+0x33/0x50\n[  826.450650]  print_report+0xc2/0x610\n[  826.450998]  ? __virt_addr_valid+0xb1/0x130\n[  826.451385]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.451935]  kasan_report+0xae/0xe0\n[  826.452276]  ? mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.452829]  mlx5_add_flow_rules+0x30/0x490 [mlx5_core]\n[  826.453368]  ? __kmalloc_node+0x5a/0x120\n[  826.453733]  esw_add_restore_rule+0x20f/0x270 [mlx5_core]\n[  826.454288]  ? mlx5_eswitch_add_send_to_vport_meta_rule+0x260/0x260 [mlx5_core]\n[  826.455011]  ? mutex_unlock+0x80/0xd0\n[  826.455361]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.455862]  ? mapping_add+0x2cb/0x440 [mlx5_core]\n[  826.456425]  mlx5e_tc_action_miss_mapping_get+0x139/0x180 [mlx5_core]\n[  826.457058]  ? mlx5e_tc_update_skb_nic+0xb0/0xb0 [mlx5_core]\n[  826.457636]  ? __kasan_kmalloc+0x77/0x90\n[  826.458000]  ? __kmalloc+0x57/0x120\n[  826.458336]  mlx5_tc_ct_flow_offload+0x325/0xe40 [mlx5_core]\n[  826.458916]  ? ct_kernel_enter.constprop.0+0x48/0xa0\n[  826.459360]  ? mlx5_tc_ct_parse_action+0xf0/0xf0 [mlx5_core]\n[  826.459933]  ? mlx5e_mod_hdr_attach+0x491/0x520 [mlx5_core]\n[  826.460507]  ? mlx5e_mod_hdr_get+0x12/0x20 [mlx5_core]\n[  826.461046]  ? mlx5e_tc_attach_mod_hdr+0x154/0x170 [mlx5_core]\n[  826.461635]  mlx5e_configure_flower+0x969/0x2110 [mlx5_core]\n[  826.462217]  ? _raw_spin_lock_bh+0x85/0xe0\n[  826.462597]  ? __mlx5e_add_fdb_flow+0x750/0x750 [mlx5_core]\n[  826.463163]  ? kasan_save_stack+0x2e/0x40\n[  826.463534]  ? down_read+0x115/0x1b0\n[  826.463878]  ? down_write_killable+0x110/0x110\n[  826.464288]  ? tc_setup_action.part.0+0x9f/0x3b0\n[  826.464701]  ? mlx5e_is_uplink_rep+0x4c/0x90 [mlx5_core]\n[  826.465253]  ? mlx5e_tc_reoffload_flows_work+0x130/0x130 [mlx5_core]\n[  826.465878]  tc_setup_cb_add+0x112/0x250\n[  826.466247]  fl_hw_replace_filter+0x230/0x310 [cls_flower]\n[  826.466724]  ? fl_hw_destroy_filter+0x1a0/0x1a0 [cls_flower]\n[  826.467212]  fl_change+0x14e1/0x2030 [cls_flower]\n[  826.467636]  ? sock_def_readable+0x89/0x120\n[  826.468019]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.468509]  ? kasan_unpoison+0x23/0x50\n[  826.468873]  ? get_random_u16+0x180/0x180\n[  826.469244]  ? __radix_tree_lookup+0x2b/0x130\n[  826.469640]  ? fl_get+0x7b/0x140 [cls_flower]\n[  826.470042]  ? fl_mask_put+0x200/0x200 [cls_flower]\n[  826.470478]  ? __mutex_unlock_slowpath.constprop.0+0x210/0x210\n[  826.470973]  ? fl_tmplt_create+0x2d0/0x2d0 [cls_flower]\n[  826.471427]  tc_new_tfilter+0x644/0x1050\n[  826.471795]  ? tc_get_tfilter+0x860/0x860\n[  826.472170]  ? __thaw_task+0x130/0x130\n[  826.472525]  ? arch_stack_walk+0x98/0xf0\n[  826.472892]  ? cap_capable+0x9f/0xd0\n[  826.473235]  ? security_capable+0x47/0x60\n[  826.473608]  rtnetlink_rcv_msg+0x1d5/0x550\n[  826.473985]  ? rtnl_calcit.isra.0+0x1f0/0x1f0\n[  826.474383]  ? __stack_depot_save+0x35/0x4c0\n[  826.474779]  ? kasan_save_stack+0x2e/0x40\n[  826.475149]  ? kasan_save_stack+0x1e/0x40\n[  826.475518]  ? __kasan_record_aux_stack+0x9f/0xb0\n[  826.475939]  ? task_work_add+0x77/0x1c0\n[  826.476305]  netlink_rcv_skb+0xe0/0x210\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is triggered only from the local tc/rtnetlink configuration path (`sendmsg` on a netlink socket \u2192 `tc_new_tfilter` \u2192 `mlx5e_configure_flower` \u2192 `mlx5e_tc_action_miss_mapping_get`); no remote packet or peer data reaches the vulnerable code, which lives entirely in the flow-rule *insertion* path rather than the RX path.\nAC:L - A single deterministic `tc filter add ... flower ... action ct` on an mlx5 netdev in the default nic/legacy eswitch mode hits the stale `esw-\u003eoffloads` pointers every time \u2014 there is no race, no timing window, and the switchdev\u2192legacy transition that turns this into a full slab UAF is itself a devlink operation the same actor performs, so every precondition is attacker-controlled.\nPR:L - The only gate is `netlink_net_capable(skb, CAP_NET_ADMIN)` in `rtnetlink_rcv_msg`, which checks the capability against the user namespace owning the netns, so an unprivileged user holding CAP_NET_ADMIN in a user/network namespace \u2014 or a container given an mlx5 VF/SF netdev via SR-IOV, a routine cloud deployment \u2014 can reach it without real root.\nUI:N - The attacker adds the tc flower/CT filter itself in a single syscall sequence; no victim action, mount, or second party is involved.\nS:U - The corruption is confined to kernel heap objects managed by the same kernel security authority; there is no VM, IOMMU, or hypervisor boundary crossed.\nC:H - KASAN confirms an 8-byte read from a freed kmalloc-512 flow table (`find_root()` reading `ft-\u003enode.parent`), and the code then chases further pointers out of that freed object \u2014 with standard slab grooming this yields an attacker-directed kernel-memory read primitive, not a bounded leak.\nI:H - The freed flow table is also written \u2014 `nested_down_read_ref_node()` bumps a refcount and takes an rwsem inside freed memory, and `tree_add_node()`/`list_add()` splice new nodes into freed lists \u2014 and `add_rule_fte()` performs `root-\u003ecmds-\u003ecreate_fte(...)`, an indirect call through a function-pointer table reached from the reclaimable object, giving a control-flow hijack path.\nA:H - The reported failure is a KASAN slab-use-after-free that oopses the kernel, and where switchdev was never enabled the same path dereferences a NULL `reg_c0_obj_pool` in `mapping_add()` for a guaranteed panic \u2014 either way an unprivileged-namespace actor can crash the host at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:18:07.580Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4150441c010dec36abc389828e2e4758bd8ad4b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/dfa1e46d6093831b9d49f0f350227a1d13644a2f"
        }
      ],
      "title": "net/mlx5e: TC, Fix using eswitch mapping in nic mode",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54216",
    "datePublished": "2025-12-30T12:11:12.730Z",
    "dateReserved": "2025-12-30T12:06:44.500Z",
    "dateUpdated": "2026-08-05T09:18:07.580Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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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.
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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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