CVE-2024-26919

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Change the directory name to match the ulpi device."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The use-after-free is triggered by a local read of `/sys/kernel/debug/ulpi/<parent>/regs`, a local filesystem operation on the affected host. No network protocol or physical device insertion is involved \u2014 the ULPI PHY is an on-board SoC component, not a hot-pluggable peripheral.\nAC:L - The stale debugfs entry is created deterministically by any deferred probe or driver unbind (`goto ulpi_exit` in `ci_hdrc_probe`), and every subsequent read reliably dereferences the freed `struct ulpi` and indirect-calls `ulpi->ops->read`. The attacker fully controls when the read happens, so heap grooming between the `kfree()` and the read is entirely within their control \u2014 no condition depends on external state.\nPR:L - The kernel itself publishes the leaked directory as 0755 and the `regs` file as 0444, so any local user who can traverse the debugfs mount can trigger the UAF; on the ULPI-bearing platforms that matter (Android handsets, automotive/industrial chipidea and dwc3 boards) debugfs is commonly mounted with relaxed mode or group access for diagnostics daemons. No capability, namespace privilege, or kernel-enforced access check guards the vulnerable file.\nUI:N - The attacker performs the read themselves; no victim action is required. The dangling pointer arises automatically from normal deferred-probe behavior at boot.\nS:U - The freed object, the corrupted heap, and the hijackable indirect call all live within the kernel's own security authority. There is no VM, IOMMU, or sandbox boundary crossed.\nC:H - This is a use-after-free on a ~1KB slab object; reclaiming the freed `struct ulpi` with attacker-shaped data and reading `regs` turns `ulpi->ops->read` into a controlled call, which is a general kernel-memory disclosure primitive. Even without grooming, the file dumps values derived from freed kernel heap contents.\nI:H - `ulpi_read()` loads a function pointer out of freed memory and indirect-calls it (21 times per read of `regs`), giving direct control-flow hijack once the slab slot is reclaimed \u2014 a full arbitrary-write/code-execution primitive, not just corruption.\nA:H - Dereferencing the freed `struct ulpi` and calling through a garbage `ops` pointer oopses or panics the kernel, and the stale entry can be read repeatedly. 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Even without grooming, the file dumps values derived from freed kernel heap contents.\nI:H - `ulpi_read()` loads a function pointer out of freed memory and indirect-calls it (21 times per read of `regs`), giving direct control-flow hijack once the slab slot is reclaimed \u2014 a full arbitrary-write/code-execution primitive, not just corruption.\nA:H - Dereferencing the freed `struct ulpi` and calling through a garbage `ops` pointer oopses or panics the kernel, and the stale entry can be read repeatedly. 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This results in the\ndirectory sticking around and preventing subsequent (deferred) probes\nfrom succeeding. 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This results in the\ndirectory sticking around and preventing subsequent (deferred) probes\nfrom succeeding. Change the directory name to match the ulpi device."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: usb: ulpi: corrige la fuga del directorio debugfs La ra\u00edz debugfs por dispositivo ULPI lleva el nombre del dispositivo principal ulpi, pero ulpi_unregister_interface intenta eliminar un directorio debugfs que lleva el nombre del dispositivo ulpi en s\u00ed. Esto da como resultado que el directorio permanezca y evite que las pruebas posteriores (diferidas) se realicen correctamente. Cambie el nombre del directorio para que coincida con el dispositivo ulpi."}], "id": "CVE-2024-26919", "lastModified": "2026-08-04T11:17:20.790", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26919", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-04-23T14:00:39.264752Z", "version": "2.0.3"}}]}, "published": "2024-04-17T16:15:08.353", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/330d22aba17a4d30a56f007d0f51291d7e00862b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33713945cc92ea9c4a1a9479d5c1b7acb7fc4df3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3caf2b2ad7334ef35f55b95f3e1b138c6f77b368"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d31b886ed6a5095214062ee4fb55037eb930adb6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/330d22aba17a4d30a56f007d0f51291d7e00862b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33713945cc92ea9c4a1a9479d5c1b7acb7fc4df3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3caf2b2ad7334ef35f55b95f3e1b138c6f77b368"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d31b886ed6a5095214062ee4fb55037eb930adb6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:3627", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.5.1.rt7.346.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}, {"advisory": "RHSA-2024:3618", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.5.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-06-05T00:00:00Z"}], "bugzilla": {"description": "kernel: usb: ulpi: Fix debugfs directory leak", "id": "2275777", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2275777"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nusb: ulpi: Fix debugfs directory leak\nThe ULPI per-device debugfs root is named after the ulpi device's\nparent, but ulpi_unregister_interface tries to remove a debugfs\ndirectory named after the ulpi device itself. This results in the\ndirectory sticking around and preventing subsequent (deferred) probes\nfrom succeeding. Change the directory name to match the ulpi device."], "name": "CVE-2024-26919", "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: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": "2024-04-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26919\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26919\nhttps://lore.kernel.org/linux-cve-announce/2024041738-CVE-2024-26919-5100@gregkh/T"], "threat_severity": "Low"}

{}