{ "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": "2026-10-16T19:06:00.603Z" }, "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" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-74604", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:02:06.926794Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:06:00.603Z" } } ] } }