CVE-2026-46288

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46288", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.110Z", "datePublished": "2026-06-08T15:41:31.868Z", "dateUpdated": "2026-08-05T12:31:02.134Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:31:02.134Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in of_unittest_changeset()\n\nThe variable 'parent' is assigned the value of 'nchangeset' earlier in the\nfunction, meaning both point to the same struct device_node. The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses 'parent' to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n'parent', avoiding the UAF."}], "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 vulnerable code runs only during late_initcall boot self-tests in drivers/of/unittest.c; reaching it requires local ability to build and boot a kernel with CONFIG_OF_UNITTEST enabled, with no network, syscall, or ioctl runtime path.\nAC:L - Once the unittest kernel boots, the UAF triggers deterministically after of_changeset_revert() when of_node_put() drops the sole reference; no race or attacker-uncontrolled memory layout is required.\nPR:N - Exploitation does not require privileges on a running production system\u2014only booting a specially built unittest kernel\u2014so no authenticated local user or namespace capability on the target image is needed.\nUI:N - The unittest executes automatically during kernel initialization after testcase DT data is attached; no additional victim interaction beyond booting the test configuration is required.\nS:U - The UAF corrupts kernel heap memory during in-kernel device-tree self-tests and does not cross VM, sandbox, or IOMMU security boundaries.\nC:H - After of_node_put() frees the device_node, of_property_present() and of_property_read_string() dereference freed memory, enabling kernel information disclosure from attacker-influencable freed heap contents.\nI:H - Use-after-free on a struct device_node in kernel heap can be leveraged for memory corruption and arbitrary kernel code execution via heap grooming, not merely a bounded write.\nA:H - Dereferencing a freed device_node during property lookups can cause kernel oops, BUG, or panic during boot-time unittest execution."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/of/unittest.c"], "versions": [{"version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "lessThan": "37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1", "status": "affected", "versionType": "git"}, {"version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "lessThan": "7f0f0926f3010b10cff5e93446258f971e42f2fd", "status": "affected", "versionType": "git"}, {"version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "lessThan": "6fdad20b7975bdc32e85b45f8f7c640f6687b81f", "status": "affected", "versionType": "git"}, {"version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "lessThan": "faecdd423c27f0d6090156a435ba9dbbac0eaddb", "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/of/unittest.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.12", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1"}, {"url": "https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd"}, {"url": "https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f"}, {"url": "https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb"}], "title": "of: unittest: fix use-after-free in of_unittest_changeset()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/of/unittest.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1", "status": "affected", "version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "versionType": "git"}, {"lessThan": "7f0f0926f3010b10cff5e93446258f971e42f2fd", "status": "affected", "version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "versionType": "git"}, {"lessThan": "6fdad20b7975bdc32e85b45f8f7c640f6687b81f", "status": "affected", "version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "versionType": "git"}, {"lessThan": "faecdd423c27f0d6090156a435ba9dbbac0eaddb", "status": "affected", "version": "1c668ea65506e67ce2eae07b69bb09fcdd86e309", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/of/unittest.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.86", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.27", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A868CB0E-7563-461B-9681-F1CE80B353EE", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in of_unittest_changeset()\n\nThe variable 'parent' is assigned the value of 'nchangeset' earlier in the\nfunction, meaning both point to the same struct device_node. The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses 'parent' to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n'parent', avoiding the UAF."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nof: unittest: corregir uso despu\u00e9s de liberaci\u00f3n en of_unittest_changeset()\n\nLa variable 'parent' se le asigna el valor de 'nchangeset' anteriormente en la funci\u00f3n, lo que significa que ambos apuntan a la misma estructura device_node. La llamada a of_node_put(nchangeset) puede decrementar el contador de referencias a cero y liberar el nodo si no hay otros poseedores. Despu\u00e9s de eso, el c\u00f3digo todav\u00eda usa 'parent' para verificar la presencia de una propiedad y para leer una propiedad de cadena, lo que lleva a un uso despu\u00e9s de liberaci\u00f3n.\n\nSolucione esto moviendo la llamada a of_node_put() despu\u00e9s del \u00faltimo acceso a 'parent', evitando el UAF."}], "id": "CVE-2026-46288", "lastModified": "2026-07-23T08:10:00.137", "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": "2026-06-08T17:16:46.957", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: of: unittest: fix use-after-free in of_unittest_changeset()", "id": "2486469", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486469"}, "csaw": false, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel. This vulnerability, a use-after-free (UAF), occurs within the `of_unittest_changeset()` function due to improper handling of device node references. An attacker could exploit this by causing a device node's memory to be freed while it is still in use. This could lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-46288", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46288\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46288\nhttps://lore.kernel.org/linux-cve-announce/2026060844-CVE-2026-46288-76f3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c668ea65506e67ce2eae07b69bb09fcdd86e309,37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c668ea65506e67ce2eae07b69bb09fcdd86e309,7f0f0926f3010b10cff5e93446258f971e42f2fd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c668ea65506e67ce2eae07b69bb09fcdd86e309,6fdad20b7975bdc32e85b45f8f7c640f6687b81f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c668ea65506e67ce2eae07b69bb09fcdd86e309,faecdd423c27f0d6090156a435ba9dbbac0eaddb)"}}], "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": "affected", "versions": {"scheme": "generic", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.27,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "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": "2026-06-08T19:30:06.104031+00:00", "title": "Use\u2011After\u2011Free in Linux kernel device node handling", "updated": "2026-08-13T20:45:02.483722+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}