{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74604", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.919Z", "datePublished": "2026-08-22T15:31:52.295Z", "dateUpdated": "2026-08-25T05:40:28.622Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-25T05:40:28.622Z"}, "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": {"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"}, "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thermal/thermal_hwmon.c"], "versions": [{"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "2434f4765da8ccd7ef31be88b86f1bfa2e95be11", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "999e573212d5f1debf073c68be35e55bbfad12fc", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "8d34019d1413629a434a7e8d9f91c76d256196a0", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "6b446d335ba16e93a266dd77adf1ba51abc82df4", "status": "affected", "versionType": "git"}, {"version": "030a48b0f6ce393d78b8d33debb1e2043b8cc156", "lessThan": "ff8da20b6f47c48d46e47f93f7a59e2d56ee9107", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/thermal/thermal_hwmon.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "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."}], "id": "CVE-2026-74604", "lastModified": "2026-08-25T06:18:36.557", "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": "2026-08-22T16:16:32.860", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Revert \"thermal/drivers/hwmon: Cleanup coding style a bit\"", "id": "2521446", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521446"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRevert \"thermal/drivers/hwmon: Cleanup coding style a bit\"\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.", "A flaw was found in the Linux kernel's `thermal/drivers/hwmon` component. A use-after-free vulnerability was introduced in the `thermal_add_hwmon_sysfs()` function due to the removal of a valid check in an error handling path. This flaw could allow a local attacker to cause a denial of service or potentially escalate privileges."], "name": "CVE-2026-74604", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74604\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74604\nhttps://lore.kernel.org/linux-cve-announce/2026082216-CVE-2026-74604-c7bc@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2434f4765da8ccd7ef31be88b86f1bfa2e95be11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b4c01ae6dd56d9dfd96bd1b29c28afa8fa06b366)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,999e573212d5f1debf073c68be35e55bbfad12fc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6a48ee9a5bda0f8ee501f9bef159fb9f39ff519a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8d34019d1413629a434a7e8d9f91c76d256196a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6b446d335ba16e93a266dd77adf1ba51abc82df4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ff8da20b6f47c48d46e47f93f7a59e2d56ee9107)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.15.216)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.1.183)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.152)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.104)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.45)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.1.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.216,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.183,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-22T17:00:10.933321+00:00", "title": "Use\u2011After\u2011Free in thermal_add_hwmon_sysfs Leads to Kernel Privilege Escalation", "updated": "2026-08-25T16:00:15.265243+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}