CVE-2026-74604 (GCVE-0-2026-74604)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:31 – Updated: 2026-08-25 05:40
VLAI
Title
Revert "thermal/drivers/hwmon: Cleanup coding style a bit"
Summary
In the Linux kernel, the following vulnerability has been resolved: Revert "thermal/drivers/hwmon: Cleanup coding style a bit" Revert commit 030a48b0f6ce ("thermal/drivers/hwmon: Cleanup coding style a bit") that introduced a use-after-free into the error path of thermal_add_hwmon_sysfs() by removing a valid check from it.
Severity
8.4 (High)
CVSS:3.1/AV:L/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: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < 2434f4765da8ccd7ef31be88b86f1bfa2e95be11 (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366 (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < 999e573212d5f1debf073c68be35e55bbfad12fc (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < 6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < 8d34019d1413629a434a7e8d9f91c76d256196a0 (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < 6b446d335ba16e93a266dd77adf1ba51abc82df4 (git)
Affected: 030a48b0f6ce393d78b8d33debb1e2043b8cc156 , < ff8da20b6f47c48d46e47f93f7a59e2d56ee9107 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/thermal/thermal_hwmon.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2434f4765da8ccd7ef31be88b86f1bfa2e95be11",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "999e573212d5f1debf073c68be35e55bbfad12fc",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "8d34019d1413629a434a7e8d9f91c76d256196a0",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "6b446d335ba16e93a266dd77adf1ba51abc82df4",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            },
            {
              "lessThan": "ff8da20b6f47c48d46e47f93f7a59e2d56ee9107",
              "status": "affected",
              "version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/thermal/thermal_hwmon.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "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": "5.15.216",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.104",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"thermal/drivers/hwmon: Cleanup coding style a bit\"\n\nRevert commit 030a48b0f6ce (\"thermal/drivers/hwmon: Cleanup coding style\na bit\") that introduced a use-after-free into the error path of\nthermal_add_hwmon_sysfs() by removing a valid check from it."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is in thermal_add_hwmon_sysfs() during thermal zone/hwmon driver registration; it is only reachable from kernel thermal driver probe/init paths, not from network protocols or physical buses.\nAC:L - When a second thermal zone shares an existing hwmon type and registration fails, the error path deterministically kfree()s a still-linked hwmon object, leaving a dangling entry that any later sysfs access can hit without winning a race.\nPR:N - No privileges are needed to exploit the resulting UAF: hwmon temp attributes are world-readable (0444) and unprivileged local processes routinely read /sys/class/hwmon on phones, servers, and embedded devices after latent corruption during multi-sensor thermal probe.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; reading thermal sensors or subsequent kernel hwmon operations can trigger use of the freed object automatically.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the host kernel; it does not cross VM, container, or IOMMU security boundaries by itself.\nC:H - The use-after-free of struct thermal_hwmon_device leaves a dangling list entry and device pointer; subsequent sysfs reads or thermal hwmon operations can dereference attacker-influencable freed heap memory, enabling arbitrary kernel memory disclosure.\nI:H - Heap UAF on a long-lived thermal_hwmon_device structure adjacent to list pointers and device objects provides standard kernel heap corruption primitives that can be developed into arbitrary write and local privilege escalation.\nA:H - Use-after-free in kernel thermal/hwmon registration can cause immediate kernel oops/panic on access to the freed hwmon device, and repeated or concurrent sysfs access can reliably crash or hang the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-25T05:40:28.622Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2434f4765da8ccd7ef31be88b86f1bfa2e95be11"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366"
        },
        {
          "url": "https://git.kernel.org/stable/c/999e573212d5f1debf073c68be35e55bbfad12fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d34019d1413629a434a7e8d9f91c76d256196a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b446d335ba16e93a266dd77adf1ba51abc82df4"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff8da20b6f47c48d46e47f93f7a59e2d56ee9107"
        }
      ],
      "title": "Revert \"thermal/drivers/hwmon: Cleanup coding style a bit\"",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74604",
    "datePublished": "2026-08-22T15:31:52.295Z",
    "dateReserved": "2026-08-15T05:44:03.919Z",
    "dateUpdated": "2026-08-25T05:40:28.622Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74604",
      "date": "2026-08-29",
      "epss": "0.00138",
      "percentile": "0.03459"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-24T14:44:14.000Z",
      "cve": "CVE-2026-74604",
      "id": "msrc_CVE-2026-74604",
      "initial_release_date": "2026-08-24T01:10:47.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Revert \"thermal/drivers/hwmon: Cleanup coding style a bit\"",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74604.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74604\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:32.860\",\"lastModified\":\"2026-08-25T06:18:36.557\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRevert \\\"thermal/drivers/hwmon: Cleanup coding style a bit\\\"\\n\\nRevert commit 030a48b0f6ce (\\\"thermal/drivers/hwmon: Cleanup coding style\\na bit\\\") that introduced a use-after-free into the error path of\\nthermal_add_hwmon_sysfs() by removing a valid check from it.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/thermal/thermal_hwmon.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"2434f4765da8ccd7ef31be88b86f1bfa2e95be11\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"999e573212d5f1debf073c68be35e55bbfad12fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"8d34019d1413629a434a7e8d9f91c76d256196a0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"6b446d335ba16e93a266dd77adf1ba51abc82df4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"030a48b0f6ce393d78b8d33debb1e2043b8cc156\",\"lessThan\":\"ff8da20b6f47c48d46e47f93f7a59e2d56ee9107\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/thermal/thermal_hwmon.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.152\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.104\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2434f4765da8ccd7ef31be88b86f1bfa2e95be11\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6b446d335ba16e93a266dd77adf1ba51abc82df4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d34019d1413629a434a7e8d9f91c76d256196a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/999e573212d5f1debf073c68be35e55bbfad12fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff8da20b6f47c48d46e47f93f7a59e2d56ee9107\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-25T08:50:25+00:00",
      "cve": "CVE-2026-74604",
      "id": "CVE-2026-74604",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Revert \"thermal/drivers/hwmon: Cleanup coding style a bit\"",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74604.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
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.