CVE-2025-38555

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38555", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.025Z", "datePublished": "2025-08-19T17:02:34.110Z", "dateUpdated": "2026-08-05T12:02:53.142Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:02:53.142Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget : fix use-after-free in composite_dev_cleanup()\n\n1. In func configfs_composite_bind() -> composite_os_desc_req_prepare():\nif kmalloc fails, the pointer cdev->os_desc_req will be freed but not\nset to NULL. Then it will return a failure to the upper-level function.\n2. in func configfs_composite_bind() -> composite_dev_cleanup():\nit will checks whether cdev->os_desc_req is NULL. If it is not NULL, it\nwill attempt to use it.This will lead to a use-after-free issue.\n\nBUG: KASAN: use-after-free in composite_dev_cleanup+0xf4/0x2c0\nRead of size 8 at addr 0000004827837a00 by task init/1\n\nCPU: 10 PID: 1 Comm: init Tainted: G O 5.10.97-oh #1\n kasan_report+0x188/0x1cc\n __asan_load8+0xb4/0xbc\n composite_dev_cleanup+0xf4/0x2c0\n configfs_composite_bind+0x210/0x7ac\n udc_bind_to_driver+0xb4/0x1ec\n usb_gadget_probe_driver+0xec/0x21c\n gadget_dev_desc_UDC_store+0x264/0x27c"}], "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 vulnerability is reached entirely from local userspace by writing to the gadget's configfs `UDC` attribute (`gadget_dev_desc_UDC_store()` \u2192 `udc_bind_to_driver()` \u2192 `configfs_composite_bind()`); no USB bus traffic, attached host, or physical device access participates in triggering it. Despite being in the USB gadget stack, the trigger is a plain local file write, so Local is both accurate and higher severity than Physical.\nAC:L - Once the 4 KB `kmalloc()` returns NULL the dangling `cdev->os_desc_req` is dereferenced deterministically on the unwind path with no race to win, and the attacker controls every other precondition (`os_desc` group enabled to set `use_os_string`, unlimited retries of the `UDC` write) while driving the system toward the allocation failure with ordinary memory pressure. The long `purge_configs_funcs()` window between free and use also lets the attacker reliably spray the freed slab object rather than depending on unknowable layout.\nPR:L - configfs is not mountable from a user namespace, but the `/sys/kernel/config/usb_gadget` tree is commonly delegated to a non-root service account (Android's system-uid USB gadget HAL, embedded gadget managers), so an unprivileged-but-delegated local account can create the `os_desc` configuration and write `UDC`. No capability check guards the store handler itself beyond file ownership.\nUI:N - The attacker performs the whole sequence \u2014 building the gadget, enabling OS descriptors, generating memory pressure, and writing `UDC` \u2014 with no action required from any other user or administrator. The use-after-free fires inside the attacker's own write syscall.\nS:U - The corruption occurs in kernel slab memory during the calling task's own syscall and stays within the kernel's security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `composite_dev_cleanup()` reads `cdev->os_desc_req->buf` out of a freed slab object after a long reclaim window, and an attacker who sprays that object controls the value used for a subsequent `kfree()`, turning the UAF into a heap-manipulation primitive that can be leveraged to read arbitrary kernel memory. Per kernel scoring guidance, a use-after-free is High confidentiality impact.\nI:H - The stale pointer yields `kfree()` of an attacker-influenced pointer plus a NULL write into the reclaimed object and then a second free of the already-freed `usb_request` \u2014 an arbitrary-free and double-free combination that is a well-established route to slab corruption, arbitrary write, and control-flow hijack.\nA:H - Even without exploitation the double free and freeing of a bogus `buf` pointer corrupt the SLUB freelist and reliably produce a KASAN report, BUG, or kernel panic \u2014 the reporter's own trace shows the oops occurring in PID 1 (`init`), which is fatal to the system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/composite.c"], "versions": [{"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "dba96dfa5a0f685b959dd28a52ac8dab0b805204", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "2db29235e900a084a656dea7e0939b0abb7bb897", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "8afb22aa063f706f3343707cdfb8cda4d021dd33", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "e624bf26127645a2f7821e73fdf6dc64bad07835", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "aada327a9f8028c573636fa60c0abc80fb8135c9", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "5f06ee9f9a3665d43133f125c17e5258a13f3963", "status": "affected", "versionType": "git"}, {"version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "lessThan": "bd3c4ef60baf7f65c963f3e12d9d7b2b091e20ba", "status": 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{"version": "6.1.148", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.102", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.42", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.10", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.1", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "3.16", "versionEndExcluding": "5.4.297"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.10.241"}, 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[{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:39:48.711Z"}}]}}

{}

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"37a3a533429ef9b3cc9f15a656c19623f0e88df7", "versionType": "git"}, {"lessThan": "5f06ee9f9a3665d43133f125c17e5258a13f3963", "status": "affected", "version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "versionType": "git"}, {"lessThan": "bd3c4ef60baf7f65c963f3e12d9d7b2b091e20ba", "status": "affected", "version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "versionType": "git"}, {"lessThan": "e1be1f380c82a69f80c68c96a7cfe8759fb30355", "status": "affected", "version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "versionType": "git"}, {"lessThan": "151c0aa896c47a4459e07fee7d4843f44c1bb18e", "status": "affected", "version": "37a3a533429ef9b3cc9f15a656c19623f0e88df7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/usb/gadget/composite.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.16"}, {"lessThan": "3.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.297", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.241", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.190", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.148", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.102", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.42", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.10", "versionType": "semver"}, {"lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.1", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ECFB74C3-BE5C-45E4-8F58-5736A24136CE", "versionEndExcluding": "5.4.297", "versionStartIncluding": "3.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D0D21C35-EB8A-488A-BBF9-403E4817E5DD", "versionEndExcluding": "5.10.241", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AD9E597F-3DDE-4D7E-976C-463D0611F13F", "versionEndExcluding": "5.15.190", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3E5B1B93-C244-4B54-B3AB-12C2635A443B", "versionEndExcluding": "6.1.148", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": 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"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget : fix use-after-free in composite_dev_cleanup()\n\n1. In func configfs_composite_bind() -> composite_os_desc_req_prepare():\nif kmalloc fails, the pointer cdev->os_desc_req will be freed but not\nset to NULL. Then it will return a failure to the upper-level function.\n2. in func configfs_composite_bind() -> composite_dev_cleanup():\nit will checks whether cdev->os_desc_req is NULL. If it is not NULL, it\nwill attempt to use it.This will lead to a use-after-free issue.\n\nBUG: KASAN: use-after-free in composite_dev_cleanup+0xf4/0x2c0\nRead of size 8 at addr 0000004827837a00 by task init/1\n\nCPU: 10 PID: 1 Comm: init Tainted: G O 5.10.97-oh #1\n kasan_report+0x188/0x1cc\n __asan_load8+0xb4/0xbc\n composite_dev_cleanup+0xf4/0x2c0\n configfs_composite_bind+0x210/0x7ac\n udc_bind_to_driver+0xb4/0x1ec\n usb_gadget_probe_driver+0xec/0x21c\n gadget_dev_desc_UDC_store+0x264/0x27c"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: gadget: correcci\u00f3n del problema de use-after-free en composite_dev_cleanup(). 1. En la funci\u00f3n configfs_composite_bind() -> composite_os_desc_req_prepare(): si kmalloc falla, el puntero cdev->os_desc_req se liberar\u00e1, pero no se establecer\u00e1 en NULL. En ese caso, devolver\u00e1 un error a la funci\u00f3n de nivel superior. 2. En la funci\u00f3n configfs_composite_bind() -> composite_dev_cleanup(): comprobar\u00e1 si cdev->os_desc_req es NULL. Si no lo es, intentar\u00e1 usarlo. Esto provocar\u00e1 un problema de use-after-free. ERROR: KASAN: use-after-free en composite_dev_cleanup+0xf4/0x2c0 Lectura de tama\u00f1o 8 en la direcci\u00f3n 0000004827837a00 por la tarea init/1 CPU: 10 PID: 1 Comm: init Contaminado: GO 5.10.97-oh #1 kasan_report+0x188/0x1cc __asan_load8+0xb4/0xbc composite_dev_cleanup+0xf4/0x2c0 configfs_composite_bind+0x210/0x7ac udc_bind_to_driver+0xb4/0x1ec usb_gadget_probe_driver+0xec/0x21c gadget_dev_desc_UDC_store+0x264/0x27c"}], "id": "CVE-2025-38555", "lastModified": "2026-07-30T06:23:25.793", "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": 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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-08-19T17:15:31.667", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/151c0aa896c47a4459e07fee7d4843f44c1bb18e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2db29235e900a084a656dea7e0939b0abb7bb897"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f06ee9f9a3665d43133f125c17e5258a13f3963"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8afb22aa063f706f3343707cdfb8cda4d021dd33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aada327a9f8028c573636fa60c0abc80fb8135c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bd3c4ef60baf7f65c963f3e12d9d7b2b091e20ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dba96dfa5a0f685b959dd28a52ac8dab0b805204"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e1be1f380c82a69f80c68c96a7cfe8759fb30355"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e624bf26127645a2f7821e73fdf6dc64bad07835"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: usb: gadget : fix use-after-free in composite_dev_cleanup()", "id": "2389518", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2389518"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-38555", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "2025-08-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38555\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38555\nhttps://lore.kernel.org/linux-cve-announce/2025081905-CVE-2025-38555-e81a@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-08-21T12:31:48.512640+00:00", "updated": "2025-08-21T12:31:48.512719+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}