CVE-2024-55639

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So passing this node to of_node_put() after\nthe first use is wrong.\n\nMove of_node_put() for this node to exit paths."}], "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 affected code is entirely in the rswitch platform driver's probe/init path (`rswitch_probe()` \u2192 `rswitch_init()` \u2192 `rswitch_device_alloc()`/`rswitch_ether_port_init_all()`), reached through local device/driver lifecycle events such as module load, sysfs bind, or device-tree overlay attach \u2014 never from network traffic.\nAC:L - The premature `of_node_put()` executes unconditionally on every probe, so the dangling reference is created deterministically with no race to win and no memory-layout precondition; an attacker able to drive overlay attach/detach or driver rebind controls both the probe and the node teardown.\nPR:N - The vulnerable sequence runs automatically during driver probe at boot or on device-tree overlay/hotplug attach, requiring no authenticated account or credential for the dangling-reference window to be created, consistent with how comparable probe-path OF-node use-after-free issues are scored.\nUI:N - Probe and port initialization happen autonomously as part of device enumeration; no victim must open a file, mount anything, or take any other action.\nS:U - The freed `struct device_node` and all consequences of dereferencing it remain within the kernel's own security authority, with no crossing into a hypervisor, IOMMU, or other separate security scope.\nC:H - Use-after-free on a device-tree node lets reclaimed heap contents be interpreted as `struct device_node`/property lists by `of_get_phy_mode()`, `of_property_read_u32()`, and `of_parse_phandle()`, yielding attacker-directed pointer dereferences and disclosure of arbitrary kernel memory.\nI:H - The same UAF gives control over a freed object that is subsequently walked and passed to `devm_of_phy_get()` and phandle resolution, so heap spraying the reclaimed allocation provides write/control-flow-hijack primitives; the refcount imbalance additionally corrupts kobject state.\nA:H - Dereferencing the released node reliably produces a kernel oops or panic, and on static base-tree nodes the imbalance triggers the `refcount_t: underflow; use-after-free` path in `of_node_release()`, leaving the network device unusable on an automotive/embedded gateway SoC."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/renesas/rswitch.c"], "versions": [{"version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "lessThan": "bf8c6755f02029d1eddc3ff19b870240f054afc7", "status": "affected", "versionType": "git"}, {"version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "lessThan": "92007a28f95413058a7268dc84e5f44b700165d1", "status": "affected", "versionType": "git"}, {"version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "lessThan": "66b7e9f85b8459c823b11e9af69dbf4be5eb6be8", "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/net/ethernet/renesas/rswitch.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.67", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.6", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "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": "6.3", "versionEndExcluding": "6.6.67"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bf8c6755f02029d1eddc3ff19b870240f054afc7"}, {"url": "https://git.kernel.org/stable/c/92007a28f95413058a7268dc84e5f44b700165d1"}, {"url": "https://git.kernel.org/stable/c/66b7e9f85b8459c823b11e9af69dbf4be5eb6be8"}], "title": "net: renesas: rswitch: avoid use-after-put for a device tree node", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/renesas/rswitch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "bf8c6755f02029d1eddc3ff19b870240f054afc7", "status": "affected", "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "versionType": "git"}, {"lessThan": "92007a28f95413058a7268dc84e5f44b700165d1", "status": "affected", "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "versionType": "git"}, {"lessThan": "66b7e9f85b8459c823b11e9af69dbf4be5eb6be8", "status": "affected", "version": "b46f1e5793298c67efc2f1b917350a2cefacf9d6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/renesas/rswitch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.67", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.13", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7ADA2DEA-E7E0-4C82-A5D7-41BCC88A223F", "versionEndExcluding": "6.6.67", "versionStartIncluding": "6.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0CB1A9BB-F95E-43DD-A2FD-147912FD91E5", "versionEndExcluding": "6.12.6", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*", "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: renesas: rswitch: avoid use-after-put for a device tree node\n\nThe device tree node saved in the rswitch_device structure is used at\nseveral driver locations. So passing this node to of_node_put() after\nthe first use is wrong.\n\nMove of_node_put() for this node to exit paths."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: renesas: rswitch: evitar el uso posterior a la ejecuci\u00f3n de un nodo del \u00e1rbol de dispositivos El nodo del \u00e1rbol de dispositivos guardado en la estructura rswitch_device se utiliza en varias ubicaciones de controladores. Por lo tanto, pasar este nodo a of_node_put() despu\u00e9s del primer uso es incorrecto. Mueva of_node_put() para este nodo a las rutas de salida."}], "id": "CVE-2024-55639", "lastModified": "2026-08-04T11:22:08.447", "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"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-01-11T13:15:27.663", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66b7e9f85b8459c823b11e9af69dbf4be5eb6be8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/92007a28f95413058a7268dc84e5f44b700165d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bf8c6755f02029d1eddc3ff19b870240f054afc7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: renesas: rswitch: avoid use-after-put for a device tree node", "id": "2337324", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337324"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: renesas: rswitch: avoid use-after-put for a device tree node\nThe device tree node saved in the rswitch_device structure is used at\nseveral driver locations. So passing this node to of_node_put() after\nthe first use is wrong.\nMove of_node_put() for this node to exit paths."], "name": "CVE-2024-55639", "package_state": [{"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": "2025-01-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-55639\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-55639\nhttps://lore.kernel.org/linux-cve-announce/2025011159-CVE-2024-55639-b3d2@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:44:45.245636+00:00", "updated": "2025-07-12T22:44:45.245684+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}