Vulnerability-Lookup

GHSA-R696-8QVR-QPJ7

Vulnerability from github – Published: 2025-12-16 15:30 – Updated: 2026-07-30 06:32

Details

In the Linux kernel, the following vulnerability has been resolved:

amd/amdkfd: enhance kfd process check in switch partition

current switch partition only check if kfd_processes_table is empty. kfd_prcesses_table entry is deleted in kfd_process_notifier_release, but kfd_process tear down is in kfd_process_wq_release.

consider two processes:

Process A (workqueue) -> kfd_process_wq_release -> Access kfd_node member Process B switch partition -> amdgpu_xcp_pre_partition_switch -> amdgpu_amdkfd_device_fini_sw -> kfd_node tear down.

Process A and B may trigger a race as shown in dmesg log.

This patch is to resolve the race by adding an atomic kfd_process counter kfd_processes_count, it increment as create kfd process, decrement as finish kfd_process_wq_release.

v2: Put kfd_processes_count per kfd_dev, move decrement to kfd_process_destroy_pdds and bug fix. (Philip Yang)

[3966658.307702] divide error: 0000 [#1] SMP NOPTI [3966658.350818] i10nm_edac [3966658.356318] CPU: 124 PID: 38435 Comm: kworker/124:0 Kdump: loaded Tainted [3966658.356890] Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu] [3966658.362839] nfit [3966658.366457] RIP: 0010:kfd_get_num_sdma_engines+0x17/0x40 [amdgpu] [3966658.366460] Code: 00 00 e9 ac 81 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 48 8b 4f 08 48 8b b7 00 01 00 00 8b 81 58 26 03 00 99 be b8 01 00 00 80 b9 70 2e 00 00 00 74 0b 83 f8 02 ba 02 00 00 [3966658.380967] x86_pkg_temp_thermal [3966658.391529] RSP: 0018:ffffc900a0edfdd8 EFLAGS: 00010246 [3966658.391531] RAX: 0000000000000008 RBX: ffff8974e593b800 RCX: ffff888645900000 [3966658.391531] RDX: 0000000000000000 RSI: ffff888129154400 RDI: ffff888129151c00 [3966658.391532] RBP: ffff8883ad79d400 R08: 0000000000000000 R09: ffff8890d2750af4 [3966658.391532] R10: 0000000000000018 R11: 0000000000000018 R12: 0000000000000000 [3966658.391533] R13: ffff8883ad79d400 R14: ffffe87ff662ba00 R15: ffff8974e593b800 [3966658.391533] FS: 0000000000000000(0000) GS:ffff88fe7f600000(0000) knlGS:0000000000000000 [3966658.391534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3966658.391534] CR2: 0000000000d71000 CR3: 000000dd0e970004 CR4: 0000000002770ee0 [3966658.391535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [3966658.391535] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [3966658.391536] PKRU: 55555554 [3966658.391536] Call Trace: [3966658.391674] deallocate_sdma_queue+0x38/0xa0 [amdgpu] [3966658.391762] process_termination_cpsch+0x1ed/0x480 [amdgpu] [3966658.399754] intel_powerclamp [3966658.402831] kfd_process_dequeue_from_all_devices+0x5b/0xc0 [amdgpu] [3966658.402908] kfd_process_wq_release+0x1a/0x1a0 [amdgpu] [3966658.410516] coretemp [3966658.434016] process_one_work+0x1ad/0x380 [3966658.434021] worker_thread+0x49/0x310 [3966658.438963] kvm_intel [3966658.446041] ? process_one_work+0x380/0x380 [3966658.446045] kthread+0x118/0x140 [3966658.446047] ? __kthread_bind_mask+0x60/0x60 [3966658.446050] ret_from_fork+0x1f/0x30 [3966658.446053] Modules linked in: kpatch_20765354(OEK) [3966658.455310] kvm [3966658.464534] mptcp_diag xsk_diag raw_diag unix_diag af_packet_diag netlink_diag udp_diag act_pedit act_mirred act_vlan cls_flower kpatch_21951273(OEK) kpatch_18424469(OEK) kpatch_19749756(OEK) [3966658.473462] idxd_mdev [3966658.482306] kpatch_17971294(OEK) sch_ingress xt_conntrack amdgpu(OE) amdxcp(OE) amddrm_buddy(OE) amd_sched(OE) amdttm(OE) amdkcl(OE) intel_ifs iptable_mangle tcm_loop target_core_pscsi tcp_diag target_core_file inet_diag target_core_iblock target_core_user target_core_mod coldpgs kpatch_18383292(OEK) ip6table_nat ip6table_filter ip6_tables ip_set_hash_ipportip ip_set_hash_ipportnet ip_set_hash_ipport ip_set_bitmap_port xt_comment iptable_nat nf_nat iptable_filter ip_tables ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sn_core_odd(OE) i40e overlay binfmt_misc tun bonding(OE) aisqos(OE) aisqo ---truncated---

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68174"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-16T14:15:49Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\namd/amdkfd: enhance kfd process check in switch partition\n\ncurrent switch partition only check if kfd_processes_table is empty.\nkfd_prcesses_table entry is deleted in kfd_process_notifier_release, but\nkfd_process tear down is in kfd_process_wq_release.\n\nconsider two processes:\n\nProcess A (workqueue) -\u003e kfd_process_wq_release -\u003e Access kfd_node member\nProcess B switch partition -\u003e amdgpu_xcp_pre_partition_switch -\u003e amdgpu_amdkfd_device_fini_sw\n-\u003e kfd_node tear down.\n\nProcess A and B may trigger a race as shown in dmesg log.\n\nThis patch is to resolve the race by adding an atomic kfd_process counter\nkfd_processes_count, it increment as create kfd process, decrement as\nfinish kfd_process_wq_release.\n\nv2: Put kfd_processes_count per kfd_dev, move decrement to kfd_process_destroy_pdds\nand bug fix. (Philip Yang)\n\n[3966658.307702] divide error: 0000 [#1] SMP NOPTI\n[3966658.350818]  i10nm_edac\n[3966658.356318] CPU: 124 PID: 38435 Comm: kworker/124:0 Kdump: loaded Tainted\n[3966658.356890] Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n[3966658.362839]  nfit\n[3966658.366457] RIP: 0010:kfd_get_num_sdma_engines+0x17/0x40 [amdgpu]\n[3966658.366460] Code: 00 00 e9 ac 81 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 48 8b 4f 08 48 8b b7 00 01 00 00 8b 81 58 26 03 00 99 \u003cf7\u003e be b8 01 00 00 80 b9 70 2e 00 00 00 74 0b 83 f8 02 ba 02 00 00\n[3966658.380967]  x86_pkg_temp_thermal\n[3966658.391529] RSP: 0018:ffffc900a0edfdd8 EFLAGS: 00010246\n[3966658.391531] RAX: 0000000000000008 RBX: ffff8974e593b800 RCX: ffff888645900000\n[3966658.391531] RDX: 0000000000000000 RSI: ffff888129154400 RDI: ffff888129151c00\n[3966658.391532] RBP: ffff8883ad79d400 R08: 0000000000000000 R09: ffff8890d2750af4\n[3966658.391532] R10: 0000000000000018 R11: 0000000000000018 R12: 0000000000000000\n[3966658.391533] R13: ffff8883ad79d400 R14: ffffe87ff662ba00 R15: ffff8974e593b800\n[3966658.391533] FS:  0000000000000000(0000) GS:ffff88fe7f600000(0000) knlGS:0000000000000000\n[3966658.391534] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[3966658.391534] CR2: 0000000000d71000 CR3: 000000dd0e970004 CR4: 0000000002770ee0\n[3966658.391535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[3966658.391535] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\n[3966658.391536] PKRU: 55555554\n[3966658.391536] Call Trace:\n[3966658.391674]  deallocate_sdma_queue+0x38/0xa0 [amdgpu]\n[3966658.391762]  process_termination_cpsch+0x1ed/0x480 [amdgpu]\n[3966658.399754]  intel_powerclamp\n[3966658.402831]  kfd_process_dequeue_from_all_devices+0x5b/0xc0 [amdgpu]\n[3966658.402908]  kfd_process_wq_release+0x1a/0x1a0 [amdgpu]\n[3966658.410516]  coretemp\n[3966658.434016]  process_one_work+0x1ad/0x380\n[3966658.434021]  worker_thread+0x49/0x310\n[3966658.438963]  kvm_intel\n[3966658.446041]  ? process_one_work+0x380/0x380\n[3966658.446045]  kthread+0x118/0x140\n[3966658.446047]  ? __kthread_bind_mask+0x60/0x60\n[3966658.446050]  ret_from_fork+0x1f/0x30\n[3966658.446053] Modules linked in: kpatch_20765354(OEK)\n[3966658.455310]  kvm\n[3966658.464534]  mptcp_diag xsk_diag raw_diag unix_diag af_packet_diag netlink_diag udp_diag act_pedit act_mirred act_vlan cls_flower kpatch_21951273(OEK) kpatch_18424469(OEK) kpatch_19749756(OEK)\n[3966658.473462]  idxd_mdev\n[3966658.482306]  kpatch_17971294(OEK) sch_ingress xt_conntrack amdgpu(OE) amdxcp(OE) amddrm_buddy(OE) amd_sched(OE) amdttm(OE) amdkcl(OE) intel_ifs iptable_mangle tcm_loop target_core_pscsi tcp_diag target_core_file inet_diag target_core_iblock target_core_user target_core_mod coldpgs kpatch_18383292(OEK) ip6table_nat ip6table_filter ip6_tables ip_set_hash_ipportip ip_set_hash_ipportnet ip_set_hash_ipport ip_set_bitmap_port xt_comment iptable_nat nf_nat iptable_filter ip_tables ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sn_core_odd(OE) i40e overlay binfmt_misc tun bonding(OE) aisqos(OE) aisqo\n---truncated---",
  "id": "GHSA-r696-8qvr-qpj7",
  "modified": "2026-07-30T06:32:24Z",
  "published": "2025-12-16T15:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68174"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45da20e00d5da842e17dfc633072b127504f0d0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/536d80f660ec12058e461f4db387ea42bee9250d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-68174 (GCVE-0-2025-68174)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:42 – Updated: 2026-08-05 12:10

Title

amd/amdkfd: enhance kfd process check in switch partition

Summary

In the Linux kernel, the following vulnerability has been resolved: amd/amdkfd: enhance kfd process check in switch partition current switch partition only check if kfd_processes_table is empty. kfd_prcesses_table entry is deleted in kfd_process_notifier_release, but kfd_process tear down is in kfd_process_wq_release. consider two processes: Process A (workqueue) -> kfd_process_wq_release -> Access kfd_node member Process B switch partition -> amdgpu_xcp_pre_partition_switch -> amdgpu_amdkfd_device_fini_sw -> kfd_node tear down. Process A and B may trigger a race as shown in dmesg log. This patch is to resolve the race by adding an atomic kfd_process counter kfd_processes_count, it increment as create kfd process, decrement as finish kfd_process_wq_release. v2: Put kfd_processes_count per kfd_dev, move decrement to kfd_process_destroy_pdds and bug fix. (Philip Yang) [3966658.307702] divide error: 0000 [#1] SMP NOPTI [3966658.350818] i10nm_edac [3966658.356318] CPU: 124 PID: 38435 Comm: kworker/124:0 Kdump: loaded Tainted [3966658.356890] Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu] [3966658.362839] nfit [3966658.366457] RIP: 0010:kfd_get_num_sdma_engines+0x17/0x40 [amdgpu] [3966658.366460] Code: 00 00 e9 ac 81 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 48 8b 4f 08 48 8b b7 00 01 00 00 8b 81 58 26 03 00 99 <f7> be b8 01 00 00 80 b9 70 2e 00 00 00 74 0b 83 f8 02 ba 02 00 00 [3966658.380967] x86_pkg_temp_thermal [3966658.391529] RSP: 0018:ffffc900a0edfdd8 EFLAGS: 00010246 [3966658.391531] RAX: 0000000000000008 RBX: ffff8974e593b800 RCX: ffff888645900000 [3966658.391531] RDX: 0000000000000000 RSI: ffff888129154400 RDI: ffff888129151c00 [3966658.391532] RBP: ffff8883ad79d400 R08: 0000000000000000 R09: ffff8890d2750af4 [3966658.391532] R10: 0000000000000018 R11: 0000000000000018 R12: 0000000000000000 [3966658.391533] R13: ffff8883ad79d400 R14: ffffe87ff662ba00 R15: ffff8974e593b800 [3966658.391533] FS: 0000000000000000(0000) GS:ffff88fe7f600000(0000) knlGS:0000000000000000 [3966658.391534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [3966658.391534] CR2: 0000000000d71000 CR3: 000000dd0e970004 CR4: 0000000002770ee0 [3966658.391535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [3966658.391535] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [3966658.391536] PKRU: 55555554 [3966658.391536] Call Trace: [3966658.391674] deallocate_sdma_queue+0x38/0xa0 [amdgpu] [3966658.391762] process_termination_cpsch+0x1ed/0x480 [amdgpu] [3966658.399754] intel_powerclamp [3966658.402831] kfd_process_dequeue_from_all_devices+0x5b/0xc0 [amdgpu] [3966658.402908] kfd_process_wq_release+0x1a/0x1a0 [amdgpu] [3966658.410516] coretemp [3966658.434016] process_one_work+0x1ad/0x380 [3966658.434021] worker_thread+0x49/0x310 [3966658.438963] kvm_intel [3966658.446041] ? process_one_work+0x380/0x380 [3966658.446045] kthread+0x118/0x140 [3966658.446047] ? __kthread_bind_mask+0x60/0x60 [3966658.446050] ret_from_fork+0x1f/0x30 [3966658.446053] Modules linked in: kpatch_20765354(OEK) [3966658.455310] kvm [3966658.464534] mptcp_diag xsk_diag raw_diag unix_diag af_packet_diag netlink_diag udp_diag act_pedit act_mirred act_vlan cls_flower kpatch_21951273(OEK) kpatch_18424469(OEK) kpatch_19749756(OEK) [3966658.473462] idxd_mdev [3966658.482306] kpatch_17971294(OEK) sch_ingress xt_conntrack amdgpu(OE) amdxcp(OE) amddrm_buddy(OE) amd_sched(OE) amdttm(OE) amdkcl(OE) intel_ifs iptable_mangle tcm_loop target_core_pscsi tcp_diag target_core_file inet_diag target_core_iblock target_core_user target_core_mod coldpgs kpatch_18383292(OEK) ip6table_nat ip6table_filter ip6_tables ip_set_hash_ipportip ip_set_hash_ipportnet ip_set_hash_ipport ip_set_bitmap_port xt_comment iptable_nat nf_nat iptable_filter ip_tables ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sn_core_odd(OE) i40e overlay binfmt_misc tun bonding(OE) aisqos(OE) aisqo ---truncated---

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 mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/536d80f660ec12058…
https://git.kernel.org/stable/c/45da20e00d5da842e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0c7315e7d5ef9b36ca4db32ffeb34a187cbaf231 , < 536d80f660ec12058e461f4db387ea42bee9250d (git) Affected: 0c7315e7d5ef9b36ca4db32ffeb34a187cbaf231 , < 45da20e00d5da842e17dfc633072b127504f0d0e (git)
Linux	Linux	Affected: 6.5 Unaffected: 0 , < 6.5 (semver) Unaffected: 6.17.8 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_device.c",
            "drivers/gpu/drm/amd/amdkfd/kfd_priv.h",
            "drivers/gpu/drm/amd/amdkfd/kfd_process.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "536d80f660ec12058e461f4db387ea42bee9250d",
              "status": "affected",
              "version": "0c7315e7d5ef9b36ca4db32ffeb34a187cbaf231",
              "versionType": "git"
            },
            {
              "lessThan": "45da20e00d5da842e17dfc633072b127504f0d0e",
              "status": "affected",
              "version": "0c7315e7d5ef9b36ca4db32ffeb34a187cbaf231",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_device.c",
            "drivers/gpu/drm/amd/amdkfd/kfd_priv.h",
            "drivers/gpu/drm/amd/amdkfd/kfd_process.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\namd/amdkfd: enhance kfd process check in switch partition\n\ncurrent switch partition only check if kfd_processes_table is empty.\nkfd_prcesses_table entry is deleted in kfd_process_notifier_release, but\nkfd_process tear down is in kfd_process_wq_release.\n\nconsider two processes:\n\nProcess A (workqueue) -\u003e kfd_process_wq_release -\u003e Access kfd_node member\nProcess B switch partition -\u003e amdgpu_xcp_pre_partition_switch -\u003e amdgpu_amdkfd_device_fini_sw\n-\u003e kfd_node tear down.\n\nProcess A and B may trigger a race as shown in dmesg log.\n\nThis patch is to resolve the race by adding an atomic kfd_process counter\nkfd_processes_count, it increment as create kfd process, decrement as\nfinish kfd_process_wq_release.\n\nv2: Put kfd_processes_count per kfd_dev, move decrement to kfd_process_destroy_pdds\nand bug fix. (Philip Yang)\n\n[3966658.307702] divide error: 0000 [#1] SMP NOPTI\n[3966658.350818]  i10nm_edac\n[3966658.356318] CPU: 124 PID: 38435 Comm: kworker/124:0 Kdump: loaded Tainted\n[3966658.356890] Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n[3966658.362839]  nfit\n[3966658.366457] RIP: 0010:kfd_get_num_sdma_engines+0x17/0x40 [amdgpu]\n[3966658.366460] Code: 00 00 e9 ac 81 02 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00 48 8b 4f 08 48 8b b7 00 01 00 00 8b 81 58 26 03 00 99 \u003cf7\u003e be b8 01 00 00 80 b9 70 2e 00 00 00 74 0b 83 f8 02 ba 02 00 00\n[3966658.380967]  x86_pkg_temp_thermal\n[3966658.391529] RSP: 0018:ffffc900a0edfdd8 EFLAGS: 00010246\n[3966658.391531] RAX: 0000000000000008 RBX: ffff8974e593b800 RCX: ffff888645900000\n[3966658.391531] RDX: 0000000000000000 RSI: ffff888129154400 RDI: ffff888129151c00\n[3966658.391532] RBP: ffff8883ad79d400 R08: 0000000000000000 R09: ffff8890d2750af4\n[3966658.391532] R10: 0000000000000018 R11: 0000000000000018 R12: 0000000000000000\n[3966658.391533] R13: ffff8883ad79d400 R14: ffffe87ff662ba00 R15: ffff8974e593b800\n[3966658.391533] FS:  0000000000000000(0000) GS:ffff88fe7f600000(0000) knlGS:0000000000000000\n[3966658.391534] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[3966658.391534] CR2: 0000000000d71000 CR3: 000000dd0e970004 CR4: 0000000002770ee0\n[3966658.391535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[3966658.391535] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400\n[3966658.391536] PKRU: 55555554\n[3966658.391536] Call Trace:\n[3966658.391674]  deallocate_sdma_queue+0x38/0xa0 [amdgpu]\n[3966658.391762]  process_termination_cpsch+0x1ed/0x480 [amdgpu]\n[3966658.399754]  intel_powerclamp\n[3966658.402831]  kfd_process_dequeue_from_all_devices+0x5b/0xc0 [amdgpu]\n[3966658.402908]  kfd_process_wq_release+0x1a/0x1a0 [amdgpu]\n[3966658.410516]  coretemp\n[3966658.434016]  process_one_work+0x1ad/0x380\n[3966658.434021]  worker_thread+0x49/0x310\n[3966658.438963]  kvm_intel\n[3966658.446041]  ? process_one_work+0x380/0x380\n[3966658.446045]  kthread+0x118/0x140\n[3966658.446047]  ? __kthread_bind_mask+0x60/0x60\n[3966658.446050]  ret_from_fork+0x1f/0x30\n[3966658.446053] Modules linked in: kpatch_20765354(OEK)\n[3966658.455310]  kvm\n[3966658.464534]  mptcp_diag xsk_diag raw_diag unix_diag af_packet_diag netlink_diag udp_diag act_pedit act_mirred act_vlan cls_flower kpatch_21951273(OEK) kpatch_18424469(OEK) kpatch_19749756(OEK)\n[3966658.473462]  idxd_mdev\n[3966658.482306]  kpatch_17971294(OEK) sch_ingress xt_conntrack amdgpu(OE) amdxcp(OE) amddrm_buddy(OE) amd_sched(OE) amdttm(OE) amdkcl(OE) intel_ifs iptable_mangle tcm_loop target_core_pscsi tcp_diag target_core_file inet_diag target_core_iblock target_core_user target_core_mod coldpgs kpatch_18383292(OEK) ip6table_nat ip6table_filter ip6_tables ip_set_hash_ipportip ip_set_hash_ipportnet ip_set_hash_ipport ip_set_bitmap_port xt_comment iptable_nat nf_nat iptable_filter ip_tables ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 sn_core_odd(OE) i40e overlay binfmt_misc tun bonding(OE) aisqos(OE) aisqo\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 - Exploitation requires local access to the `/dev/kfd` character device to create the KFD process whose deferred teardown races the partition switch, and the free side is driven through a local sysfs attribute. There is no network-reachable path into `kfd_process_wq_release()` or `amdgpu_xcp_switch_partition_mode()`.\nAC:L - The attacker controls the UAF side directly and can widen the window from milliseconds to seconds (`flush_workqueue` + `synchronize_rcu` + bulk BO/SVM teardown in `kfd_process_wq_release()`), and on MI300-class multi-tenant hosts the partition switch is an automated orchestrator action performed at job boundaries \u2014 precisely when the attacker\u0027s process teardown is still in flight \u2014 so the collision is reliably reproducible rather than dependent on chance memory layout.\nPR:L - `kfd_open()` performs no capability check, so any unprivileged local user or container tenant with `/dev/kfd` (mode 0666 or the `render` group under standard ROCm udev rules) can create the KFD process and pdd that leave stale `kfd_node` references in the pending workqueue item. No root or capability is needed on the attacker\u0027s side of the race.\nUI:N - The vulnerable window opens automatically at process exit via the mmu_notifier release callback, with no victim action required. In the datacenter deployments where XCP repartitioning exists, the partition switch is issued by an automated scheduler/orchestrator with no human in the loop.\nS:U - The corrupted objects (`kfd_node`, `kfd_dev`, `device_queue_manager`) and the resulting code execution all live in host kernel memory, within the same security authority as the vulnerable component. No hypervisor, IOMMU, or sandbox boundary is crossed by the flaw itself.\nC:H - This is a use-after-free where freed slab contents are read back and used as pointers (`pdd-\u003edev-\u003ekfd`, `pdd-\u003edev-\u003eadev`, `dqm-\u003eops`), so an attacker who reclaims the freed `kfd_node`/`dqm` allocations gains a controlled kernel read primitive that can be escalated to arbitrary memory disclosure.\nI:H - The stale references yield both an arbitrary-ish write \u2014 `set_bit(q-\u003esdma_id, dqm-\u003esdma_bitmap)` whose target and bound are both read from freed memory \u2014 and a direct indirect call through a function pointer in the freed `dqm` (`dev-\u003edqm-\u003eops.process_termination`), which is a textbook control-flow hijack primitive once the slab is sprayed.\nA:H - The commit\u0027s own dmesg shows a fatal kernel oops (`divide error` in `kfd_get_num_sdma_engines` from the `kfd_process_wq` kworker) caused by reading `num_nodes == 0` out of the freed `kfd_dev`. Any unhandled UAF here panics the machine, taking down a shared GPU compute node."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:10:01.049Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/536d80f660ec12058e461f4db387ea42bee9250d"
        },
        {
          "url": "https://git.kernel.org/stable/c/45da20e00d5da842e17dfc633072b127504f0d0e"
        }
      ],
      "title": "amd/amdkfd: enhance kfd process check in switch partition",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68174",
    "datePublished": "2025-12-16T13:42:53.891Z",
    "dateReserved": "2025-12-16T13:41:40.251Z",
    "dateUpdated": "2026-08-05T12:10:01.049Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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