CVE-2021-47455

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[<0000000079f6e2ff>] kvasprintf+0xb5/0x150\n [<0000000026aae54f>] kvasprintf_const+0x60/0x190\n [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150\n [<000000004e35abdd>] dev_set_name+0xc0/0x100\n [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]\n [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\n\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/ptp/ptp_clock.c"], "versions": [{"version": "a33121e5487b424339636b25c35d3a180eaa5f5e", "lessThan": "f1c96d8085588e1b997a96214b409ac3be20b524", "status": "affected", "versionType": "git"}, {"version": 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"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*", "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*", "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*", "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*", "matchCriteriaId": "9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*", "matchCriteriaId": "EBD45831-4B79-42BC-ABC0-86870F0DEA89", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: Fix possible memory leak in ptp_clock_register()\n\nI got memory leak as follows when doing fault injection test:\n\nunreferenced object 0xffff88800906c618 (size 8):\n comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (age 13.188s)\n hex dump (first 8 bytes):\n 70 74 70 30 00 00 00 00 ptp0....\n backtrace:\n [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0\n [<0000000079f6e2ff>] kvasprintf+0xb5/0x150\n [<0000000026aae54f>] kvasprintf_const+0x60/0x190\n [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150\n [<000000004e35abdd>] dev_set_name+0xc0/0x100\n [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]\n [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\n\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release()."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ptp: solucione una posible p\u00e9rdida de memoria en ptp_clock_register() Obtuve una p\u00e9rdida de memoria de la siguiente manera al realizar la prueba de inyecci\u00f3n de fallas: objeto sin referencia 0xffff88800906c618 (tama\u00f1o 8): comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (edad 13,188 s) volcado hexadecimal (primeros 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [&lt;00000000312ed458&gt;] __kmalloc_track_caller+0x19f/0x3a0 [&lt;0000 000079f6e2ff&gt;] kvasprintf+0xb5 /0x150 [&lt;0000000026aae54f&gt;] kvasprintf_const+0x60/0x190 [&lt;00000000f323a5f7&gt;] kobject_set_name_vargs+0x56/0x150 [&lt;000000004e35abdd&gt;] dev_set_name+0xc0/0x100 0000000f20cfe25&gt;] ptp_clock_register+0x9f4/0xd30 [ptp] [&lt;000000008bb9f0de&gt;] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] Cuando posix_clock_register() devuelve un error, el nombre asignado en dev_set_name() se filtrar\u00e1, se debe usar put_device() para renunciar a la referencia del dispositivo, luego el nombre se liberar\u00e1 kobject_cleanup() y otra memoria se liberar\u00e1n en ptp_clock_release()."}], "id": "CVE-2021-47455", "lastModified": "2026-06-17T04:17:30.790", "metrics": {"cvssMetricV31": [{"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-2021-47455", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-10T18:55:42.625337Z", "version": "2.0.3"}}]}, "published": "2024-05-22T07:15:10.530", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: ptp: Fix possible memory leak in ptp_clock_register()", "id": "2282903", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282903"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nptp: Fix possible memory leak in ptp_clock_register()\nI got memory leak as follows when doing fault injection test:\nunreferenced object 0xffff88800906c618 (size 8):\ncomm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (age 13.188s)\nhex dump (first 8 bytes):\n70 74 70 30 00 00 00 00 ptp0....\nbacktrace:\n[<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0\n[<0000000079f6e2ff>] kvasprintf+0xb5/0x150\n[<0000000026aae54f>] kvasprintf_const+0x60/0x190\n[<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150\n[<000000004e35abdd>] dev_set_name+0xc0/0x100\n[<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp]\n[<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release()."], "name": "CVE-2021-47455", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47455\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47455\nhttps://lore.kernel.org/linux-cve-announce/2024052244-CVE-2021-47455-c4a1@gregkh/T"], "threat_severity": "Low"}

{}