FKIE_CVE-2026-80953

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-10-19 09:17
Severity
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: i3c: master: adi: initialize the lock before enabling interrupts adi_i3c_master_probe() requests the IRQ and unmasks REG_IRQ_PENDING_CMDR before the controller's IBI state, transfer queue list and transfer queue lock are initialized. A pending CMDR interrupt can therefore run adi_i3c_master_irq() and take master->xferqueue.lock before the dynamic lock has been initialized. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the probe ordering and the IRQ path adi_i3c_master_probe() -> adi_i3c_master_irq() -> xferqueue.lock, with a pending CMDR interrupt arriving after REG_IRQ_PENDING_CMDR is unmasked. Lockdep reported: INFO: trying to register non-static key. you didn't initialize this object before use? lock_acquire+0xbb/0x290 _raw_spin_lock_irqsave+0x36/0x60 adi_i3c_master_irq+0x32/0x56 [vuln_msv] adi_i3c_master_probe+0x5a/0xf47 [vuln_msv] Initialize the transfer queue and IBI state before requesting and unmasking the IRQ.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a53f9102a0d3eeb8784999f925028acf339c276
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a15a1b95de980362c14f32f519b293b0d12ce86f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de8c32b0a246bbb4b44ec29e12769496a0bf66f7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master/adi-i3c-master.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a15a1b95de980362c14f32f519b293b0d12ce86f",
              "status": "affected",
              "version": "a79ac2cdc91d6be3010f2e9a3b2a2ccfc26e2086",
              "versionType": "git"
            },
            {
              "lessThan": "de8c32b0a246bbb4b44ec29e12769496a0bf66f7",
              "status": "affected",
              "version": "a79ac2cdc91d6be3010f2e9a3b2a2ccfc26e2086",
              "versionType": "git"
            },
            {
              "lessThan": "8a53f9102a0d3eeb8784999f925028acf339c276",
              "status": "affected",
              "version": "a79ac2cdc91d6be3010f2e9a3b2a2ccfc26e2086",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/i3c/master/adi-i3c-master.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\ni3c: master: adi: initialize the lock before enabling interrupts\n\nadi_i3c_master_probe() requests the IRQ and unmasks REG_IRQ_PENDING_CMDR\nbefore the controller\u0027s IBI state, transfer queue list and transfer\nqueue lock are initialized.  A pending CMDR interrupt can therefore run\nadi_i3c_master_irq() and take master-\u003exferqueue.lock before the dynamic\nlock has been initialized.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the probe ordering and the IRQ path\nadi_i3c_master_probe() -\u003e adi_i3c_master_irq() -\u003e xferqueue.lock, with a\npending CMDR interrupt arriving after REG_IRQ_PENDING_CMDR is unmasked.\nLockdep reported:\n\n  INFO: trying to register non-static key.\n  you didn\u0027t initialize this object before use?\n  lock_acquire+0xbb/0x290\n  _raw_spin_lock_irqsave+0x36/0x60\n  adi_i3c_master_irq+0x32/0x56 [vuln_msv]\n  adi_i3c_master_probe+0x5a/0xf47 [vuln_msv]\n\nInitialize the transfer queue and IBI state before requesting and\nunmasking the IRQ."
    }
  ],
  "id": "CVE-2026-80953",
  "lastModified": "2026-10-19T09:17:26.747",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-11T20:19:01.040",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8a53f9102a0d3eeb8784999f925028acf339c276"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a15a1b95de980362c14f32f519b293b0d12ce86f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de8c32b0a246bbb4b44ec29e12769496a0bf66f7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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