CVE-2026-64162 (GCVE-0-2026-64162)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39
VLAI
Title
idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init() In idpf_ptp_init(), read_dev_clk_lock is initialized after ptp_schedule_worker() had already been called (and after idpf_ptp_settime64() could reach the lock). The PTP aux worker fires immediately upon scheduling and can call into idpf_ptp_read_src_clk_reg_direct(), which takes spin_lock(&ptp->read_dev_clk_lock) on an uninitialized lock, triggering the lockdep "non-static key" warning: [12973.796587] idpf 0000:83:00.0: Device HW Reset initiated [12974.094507] INFO: trying to register non-static key. ... [12974.097208] Call Trace: [12974.097213] <TASK> [12974.097218] dump_stack_lvl+0x93/0xe0 [12974.097234] register_lock_class+0x4c4/0x4e0 [12974.097249] ? __lock_acquire+0x427/0x2290 [12974.097259] __lock_acquire+0x98/0x2290 [12974.097272] lock_acquire+0xc6/0x310 [12974.097281] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097311] ? lockdep_hardirqs_on_prepare+0xde/0x190 [12974.097318] ? finish_task_switch.isra.0+0xd2/0x350 [12974.097330] ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp] [12974.097343] _raw_spin_lock+0x30/0x40 [12974.097353] ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097373] idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf] [12974.097391] ? kthread_worker_fn+0x88/0x3d0 [12974.097404] ? kthread_worker_fn+0x4e/0x3d0 [12974.097411] idpf_ptp_update_cached_phctime+0x26/0x120 [idpf] [12974.097428] ? _raw_spin_unlock_irq+0x28/0x50 [12974.097436] idpf_ptp_do_aux_work+0x15/0x20 [idpf] [12974.097454] ptp_aux_kworker+0x20/0x40 [ptp] [12974.097464] kthread_worker_fn+0xd5/0x3d0 [12974.097474] ? __pfx_kthread_worker_fn+0x10/0x10 [12974.097482] kthread+0xf4/0x130 [12974.097489] ? __pfx_kthread+0x10/0x10 [12974.097498] ret_from_fork+0x32c/0x410 [12974.097512] ? __pfx_kthread+0x10/0x10 [12974.097519] ret_from_fork_asm+0x1a/0x30 [12974.097540] </TASK> Move the call to spin_lock_init() up a bit to make sure read_dev_clk_lock is not touched before it's been initialized.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5cb8805d2366b20ee4d7afff586d8acf17649330 , < eb5991d4c8ba2e8153dfcda3e66a9608377b7dce (git)
Affected: 5cb8805d2366b20ee4d7afff586d8acf17649330 , < 3122d70b7c0101d897fb795658a7b93f854935f2 (git)
Affected: 5cb8805d2366b20ee4d7afff586d8acf17649330 , < da4f76b6a84ede14a71282ef841768299ead0221 (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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            "drivers/net/ethernet/intel/idpf/idpf_ptp.c"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()\n\nIn idpf_ptp_init(), read_dev_clk_lock is initialized after\nptp_schedule_worker() had already been called (and after\nidpf_ptp_settime64() could reach the lock). The PTP aux worker\nfires immediately upon scheduling and can call into\nidpf_ptp_read_src_clk_reg_direct(), which takes\nspin_lock(\u0026ptp-\u003eread_dev_clk_lock) on an uninitialized lock, triggering\nthe lockdep \"non-static key\" warning:\n\n[12973.796587] idpf 0000:83:00.0: Device HW Reset initiated\n[12974.094507] INFO: trying to register non-static key.\n...\n[12974.097208] Call Trace:\n[12974.097213]  \u003cTASK\u003e\n[12974.097218]  dump_stack_lvl+0x93/0xe0\n[12974.097234]  register_lock_class+0x4c4/0x4e0\n[12974.097249]  ? __lock_acquire+0x427/0x2290\n[12974.097259]  __lock_acquire+0x98/0x2290\n[12974.097272]  lock_acquire+0xc6/0x310\n[12974.097281]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097311]  ? lockdep_hardirqs_on_prepare+0xde/0x190\n[12974.097318]  ? finish_task_switch.isra.0+0xd2/0x350\n[12974.097330]  ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp]\n[12974.097343]  _raw_spin_lock+0x30/0x40\n[12974.097353]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097373]  idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097391]  ? kthread_worker_fn+0x88/0x3d0\n[12974.097404]  ? kthread_worker_fn+0x4e/0x3d0\n[12974.097411]  idpf_ptp_update_cached_phctime+0x26/0x120 [idpf]\n[12974.097428]  ? _raw_spin_unlock_irq+0x28/0x50\n[12974.097436]  idpf_ptp_do_aux_work+0x15/0x20 [idpf]\n[12974.097454]  ptp_aux_kworker+0x20/0x40 [ptp]\n[12974.097464]  kthread_worker_fn+0xd5/0x3d0\n[12974.097474]  ? __pfx_kthread_worker_fn+0x10/0x10\n[12974.097482]  kthread+0xf4/0x130\n[12974.097489]  ? __pfx_kthread+0x10/0x10\n[12974.097498]  ret_from_fork+0x32c/0x410\n[12974.097512]  ? __pfx_kthread+0x10/0x10\n[12974.097519]  ret_from_fork_asm+0x1a/0x30\n[12974.097540]  \u003c/TASK\u003e\n\nMove the call to spin_lock_init() up a bit to make sure read_dev_clk_lock\nis not touched before it\u0027s been initialized."
        }
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              "value": "AV:N - On internet-facing cloud or datacenter hosts using Intel idpf NICs, a remote peer can send sustained or crafted traffic that stalls TX completion, triggering `idpf_tx_timeout()` \u2192 hardware reset \u2192 `idpf_vc_core_init()` \u2192 `idpf_ptp_init()`, which reaches the uninitialized `read_dev_clk_lock` via the immediately scheduled PTP aux worker or `idpf_ptp_settime64()`.\nAC:L - Once PTP reinitialization runs with device clock access enabled, `ptp_schedule_worker(..., 0)` fires the aux kworker immediately and races deterministically with the late `spin_lock_init()`; the attacker does not need to win a timing lottery beyond causing the reset that enters this path.\nPR:N - Triggering the vulnerable init path via TX-timeout-driven hardware reset requires no target-system privileges\u2014only the ability to send traffic to a network interface managed by idpf, including unauthenticated remote access to a publicly reachable server.\nUI:N - Exploitation is fully automated once the attacker induces the reset/recovery sequence; no victim login, configuration change, or other voluntary action is required.\nS:U - Impact is confined to kernel/driver state on the host running idpf; it does not cross a VM, container, or IOMMU security boundary into another authority.\nC:H - Using `spin_lock()` on an uninitialized (zeroed) lock allows concurrent, unsynchronized entry into `idpf_ptp_read_src_clk_reg_direct()` and shared PHC/MMIO read paths, creating a race on kernel/driver state that can be leveraged for information disclosure under the kernel CNA guidance for synchronization-breaking bugs.\nI:H - Concurrent unsynchronized callers can interleave `idpf_ptp_enable_shtime()` MMIO writes and cached PHC updates, corrupting device clock and driver timing state in ways that constitute exploitable integrity impact beyond a benign crash.\nA:H - Taking an uninitialized spinlock during HW-reset recovery can cause kernel deadlock, oops, or hang (lockdep \u201cnon-static key\u201d failure was observed in the fix commit\u2019s HW-reset trace), satisfying high availability impact for kernel stability bugs."
            }
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        "dateUpdated": "2026-08-05T12:39:51.253Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/da4f76b6a84ede14a71282ef841768299ead0221"
        }
      ],
      "title": "idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()",
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    }
  },
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    "cveId": "CVE-2026-64162",
    "datePublished": "2026-07-19T15:40:48.461Z",
    "dateReserved": "2026-07-19T07:54:57.038Z",
    "dateUpdated": "2026-08-05T12:39:51.253Z",
    "state": "PUBLISHED"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()\n\nIn idpf_ptp_init(), read_dev_clk_lock is initialized after\nptp_schedule_worker() had already been called (and after\nidpf_ptp_settime64() could reach the lock). The PTP aux worker\nfires immediately upon scheduling and can call into\nidpf_ptp_read_src_clk_reg_direct(), which takes\nspin_lock(\u0026ptp-\u003eread_dev_clk_lock) on an uninitialized lock, triggering\nthe lockdep \"non-static key\" warning:\n\n[12973.796587] idpf 0000:83:00.0: Device HW Reset initiated\n[12974.094507] INFO: trying to register non-static key.\n...\n[12974.097208] Call Trace:\n[12974.097213]  \u003cTASK\u003e\n[12974.097218]  dump_stack_lvl+0x93/0xe0\n[12974.097234]  register_lock_class+0x4c4/0x4e0\n[12974.097249]  ? __lock_acquire+0x427/0x2290\n[12974.097259]  __lock_acquire+0x98/0x2290\n[12974.097272]  lock_acquire+0xc6/0x310\n[12974.097281]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097311]  ? lockdep_hardirqs_on_prepare+0xde/0x190\n[12974.097318]  ? finish_task_switch.isra.0+0xd2/0x350\n[12974.097330]  ? __pfx_ptp_aux_kworker+0x10/0x10 [ptp]\n[12974.097343]  _raw_spin_lock+0x30/0x40\n[12974.097353]  ? idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097373]  idpf_ptp_read_src_clk_reg+0xb7/0x150 [idpf]\n[12974.097391]  ? kthread_worker_fn+0x88/0x3d0\n[12974.097404]  ? kthread_worker_fn+0x4e/0x3d0\n[12974.097411]  idpf_ptp_update_cached_phctime+0x26/0x120 [idpf]\n[12974.097428]  ? _raw_spin_unlock_irq+0x28/0x50\n[12974.097436]  idpf_ptp_do_aux_work+0x15/0x20 [idpf]\n[12974.097454]  ptp_aux_kworker+0x20/0x40 [ptp]\n[12974.097464]  kthread_worker_fn+0xd5/0x3d0\n[12974.097474]  ? __pfx_kthread_worker_fn+0x10/0x10\n[12974.097482]  kthread+0xf4/0x130\n[12974.097489]  ? __pfx_kthread+0x10/0x10\n[12974.097498]  ret_from_fork+0x32c/0x410\n[12974.097512]  ? __pfx_kthread+0x10/0x10\n[12974.097519]  ret_from_fork_asm+0x1a/0x30\n[12974.097540]  \u003c/TASK\u003e\n\nMove the call to spin_lock_init() up a bit to make sure read_dev_clk_lock\nis not touched before it\u0027s been initialized."
          }
        ],
        "id": "CVE-2026-64162",
        "lastModified": "2026-08-13T15:33:16.590",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
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        "published": "2026-07-19T16:17:58.213",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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          },
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/eb5991d4c8ba2e8153dfcda3e66a9608377b7dce"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T13:33:44+00:00",
      "cve": "CVE-2026-64162",
      "id": "CVE-2026-64162",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64162.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:54:25Z",
      "cve": "CVE-2026-64162",
      "id": "CVE-2026-64162",
      "initial_release_date": "2026-07-21T12:58:34Z",
      "product_status:known_affected": "29",
      "product_status:known_not_affected": "345",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64162",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64162.json",
      "version": "6"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.