CVE-2026-89452

Status: ReceivedHigh (8.4)—

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

iommu/msm: Unwind probe state on registration failure

msm_iommu_probe() adds its devm-managed IOMMU object to qcom_iommu_devices before adding the IOMMU sysfs device and registering it with the IOMMU core.

If iommu_device_sysfs_add() fails, probe returns with the object still on qcom_iommu_devices. The driver core then releases the devm allocation, leaving a dangling list entry that later list walks may dereference.

If iommu_device_register() fails, the same dangling list entry remains and the sysfs device is left registered as well.

Read full descriptionShow less

Unwind the sysfs device and global list entry in reverse setup order on the corresponding failure paths.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 8.4

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.20%
Percentile among all scored CVEs: 8
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Primary impactT1499.004 Application or System Exploitationimpact75 %

Vulnerabilidad local en kernel Linux sin interacción de usuario (AV:L, UI:N, PR:N) que permite DoS via dangling pointer dereference durante list walks en fallo de probe.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-89452",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.4,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "42df43b36163ed7d0ab13992e411093252903273",
              "lessThan": "51e37f9179387b6e3fa64a3d3b4fece1a38b3a02",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "42df43b36163ed7d0ab13992e411093252903273",
              "lessThan": "f532401be9312ecd166f616bb74a65b0b4c150fa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "42df43b36163ed7d0ab13992e411093252903273",
              "lessThan": "7f7074a886c4a93e3d12076ce60a510a1ebe400c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "42df43b36163ed7d0ab13992e411093252903273",
              "lessThan": "535a200220ca2c83bc8bf54bd2cbe045d6ee70c4",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/iommu/msm_iommu.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/iommu/msm_iommu.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:25.843",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/msm: Unwind probe state on registration failure\n\nmsm_iommu_probe() adds its devm-managed IOMMU object to\nqcom_iommu_devices before adding the IOMMU sysfs device and registering\nit with the IOMMU core.\n\nIf iommu_device_sysfs_add() fails, probe returns with the object still on\nqcom_iommu_devices. The driver core then releases the devm allocation,\nleaving a dangling list entry that later list walks may dereference.\n\nIf iommu_device_register() fails, the same dangling list entry remains\nand the sysfs device is left registered as well.\n\nUnwind the sysfs device and global list entry in reverse setup order on\nthe corresponding failure paths."
    }
  ],
  "lastModified": "2026-10-03T11:17:42.200",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}