{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/opp/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "46696b0b2123475d7f95909435c09808fc5ffd23",
              "status": "affected",
              "version": "7034764a1e4a6edbb60914e89aad8384e3fe5d17",
              "versionType": "git"
            },
            {
              "lessThan": "bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5",
              "status": "affected",
              "version": "7034764a1e4a6edbb60914e89aad8384e3fe5d17",
              "versionType": "git"
            },
            {
              "lessThan": "f5e1cc9a284bff2510981643a5bca4bc4c21b81a",
              "status": "affected",
              "version": "7034764a1e4a6edbb60914e89aad8384e3fe5d17",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/opp/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nOPP: Fix race between OPP addition and lookup\n\nA race exists between dev_pm_opp_add_dynamic() and\ndev_pm_opp_find_freq_exact():\n\n  CPU0 (add)                          CPU1 (lookup)\n  -------------------------------     ------------------------------\n  _opp_add()\n    mutex_lock()\n    list_add(\u0026new_opp-\u003enode, head)\n    mutex_unlock()                    _opp_table_find_key()\n                                        mutex_lock()\n                                        dev_pm_opp_get(opp)\n                                          kref_get()\n                                        mutex_unlock()\n    kref_init(\u0026new_opp-\u003ekref)\n                                      dev_pm_opp_put()\n                                        kref_put_mutex()\n\nThe newly added OPP is inserted into the list before its kref is\ninitialized. A concurrent lookup can find this OPP and increment its\nreference count while it is still uninitialized, leading to refcount\ncorruption and a potential premature free.\n\nFix this by initializing -\u003ekref and -\u003eopp_table before making the OPP\nvisible via list_add(). This ensures any concurrent lookup observes a\nfully initialized object.\n\n[ Viresh: Updated commit log ]"
        }
      ],
      "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 in the kernel OPP DVFS core reached only from local cpufreq, devfreq, thermal, and GPU power-management paths (e.g. scmi-cpufreq, mtk-mfg, MSM Adreno) that call dev_pm_opp_add_dynamic() and dev_pm_opp_find_freq_exact(); there is no network, adjacent-radio, or physical-device input into _opp_add().\nAC:L - The attacker can drive the lookup side with parallel CPU/GPU load or cpufreq scaling while the kernel concurrently inserts OPPs via _opp_add() during multi-CPU SCMI/GPU power-domain attach and boot cpufreq init; both race participants are attacker-influenceable timing on multi-core ARM/Android/embedded systems.\nPR:L - No init-namespace root is required to hammer dev_pm_opp_find_freq_exact() through normal cpufreq, thermal, or GPU DVFS activity from an unprivileged local process; OPP registration runs automatically in kernel driver attach/probe paths without attacker credentials.\nUI:N - Exploitation does not require any victim action beyond the attacker (or kernel) driving DVFS activity; no mount, file open, or other interactive step is needed once the attacker runs concurrent workload or scaling pressure on the target system.\nS:U - Refcount corruption causes premature kfree() of a dev_pm_opp slab object still linked in the OPP table, enabling standard kernel memory corruption and privilege escalation within the same OS boundary rather than a VM, IOMMU, or sandbox escape.\nC:H - Uninitialized kref_get()/kref_init() races corrupt the OPP refcount and can free the structure while still listed; this use-after-free of kmalloc\u0027d dev_pm_opp memory can expose adjacent heap contents and support arbitrary kernel read primitives.\nI:H - Premature free of dev_pm_opp while its list node remains reachable allows heap reuse and controlled writes through subsequent allocations, providing a standard path to corrupt kernel objects and achieve arbitrary code execution.\nA:H - Refcount corruption can trigger _opp_kref_release() to kfree() an OPP still referenced by concurrent lookups, causing kernel oops/panic from use-after-free or list corruption during ongoing DVFS operations."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:46:47.595Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/46696b0b2123475d7f95909435c09808fc5ffd23"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb75bd7d9ae7672034f73ce67a57e6ac89bb39e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5e1cc9a284bff2510981643a5bca4bc4c21b81a"
        }
      ],
      "title": "OPP: Fix race between OPP addition and lookup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74405",
    "datePublished": "2026-08-15T05:59:14.719Z",
    "dateReserved": "2026-08-15T05:44:03.892Z",
    "dateUpdated": "2026-08-17T05:46:47.595Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}