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CVE-2021-47455 (GCVE-0-2021-47455)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:19 – Updated: 2026-05-23 15:20
VLAI
Title
ptp: Fix possible memory leak in ptp_clock_register()
Summary
In the Linux kernel, the following vulnerability has been resolved: ptp: Fix possible memory leak in ptp_clock_register() I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88800906c618 (size 8): comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s) hex dump (first 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0 [<0000000079f6e2ff>] kvasprintf+0xb5/0x150 [<0000000026aae54f>] kvasprintf_const+0x60/0x190 [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>] dev_set_name+0xc0/0x100 [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] When posix_clock_register() returns an error, the name allocated in dev_set_name() will be leaked, the put_device() should be used to give up the device reference, then the name will be freed in kobject_cleanup() and other memory will be freed in ptp_clock_release().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-10 18:55 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < f1c96d8085588e1b997a96214b409ac3be20b524 (git)
Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < 95c0a0c5ec8839f8f21672be786e87a100319ca8 (git)
Affected: a33121e5487b424339636b25c35d3a180eaa5f5e , < 4225fea1cb28370086e17e82c0f69bec2779dca0 (git)
Affected: 5230ef61882d2d14deb846eb6b48370694816e4c (git)
Affected: 6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57 (git)
Affected: 89e8fc989feaac00bf1a7f9a766289422e2f5768 (git)
Affected: 2dece4d6d13fe179ee3a5991811712725a56e2f7 (git)
Affected: 0393b8720128d5b39db8523e5bfbfc689f18c37c (git)
Affected: bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad (git)
Affected: 3.16.83 , < 3.17 (semver)
Affected: 4.4.224 , < 4.5 (semver)
Affected: 4.9.224 , < 4.10 (semver)
Affected: 4.14.162 , < 4.15 (semver)
Affected: 4.19.93 , < 4.20 (semver)
Affected: 5.4.8 , < 5.5 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.14.15 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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[\u0026lt;00000000312ed458\u0026gt;] __kmalloc_track_caller+0x19f/0x3a0 [\u0026lt;0000 000079f6e2ff\u0026gt;] kvasprintf+0xb5 /0x150 [\u0026lt;0000000026aae54f\u0026gt;] kvasprintf_const+0x60/0x190 [\u0026lt;00000000f323a5f7\u0026gt;] kobject_set_name_vargs+0x56/0x150 [\u0026lt;000000004e35abdd\u0026gt;] dev_set_name+0xc0/0x100 0000000f20cfe25\u0026gt;] ptp_clock_register+0x9f4/0xd30 [ptp] [\u0026lt;000000008bb9f0de\u0026gt;] 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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/ptp/ptp_clock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a33121e5487b424339636b25c35d3a180eaa5f5e\",\"lessThan\":\"f1c96d8085588e1b997a96214b409ac3be20b524\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a33121e5487b424339636b25c35d3a180eaa5f5e\",\"lessThan\":\"95c0a0c5ec8839f8f21672be786e87a100319ca8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a33121e5487b424339636b25c35d3a180eaa5f5e\",\"lessThan\":\"4225fea1cb28370086e17e82c0f69bec2779dca0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5230ef61882d2d14deb846eb6b48370694816e4c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"89e8fc989feaac00bf1a7f9a766289422e2f5768\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2dece4d6d13fe179ee3a5991811712725a56e2f7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0393b8720128d5b39db8523e5bfbfc689f18c37c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.16.83\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.4.224\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.224\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.162\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.93\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.8\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/ptp/ptp_clock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.241\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.14.15\",\"lessThanOrEqual\":\"5.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-10T18:55:42.625337Z\",\"id\":\"CVE-2021-47455\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.16.83\",\"versionEndExcluding\":\"3.17\",\"matchCriteriaId\":\"757FC3F8-D35F-4A41-B2EE-FB159111EF5D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.224\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"9ADA9CD5-A6CD-490F-A93C-4E5C4CEA8414\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.224\",\"versionEndExcluding\":\"4.10\",\"matchCriteriaId\":\"D0E0A17F-F59E-41B5-82D3-6A187EC99B69\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.162\",\"versionEndExcluding\":\"4.15\",\"matchCriteriaId\":\"D8E34938-B599-4B3F-9871-2341E248D9A4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.93\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"D83D88FB-206E-466D-BC71-94C228C5C9E7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.8\",\"versionEndExcluding\":\"5.14.15\",\"matchCriteriaId\":\"0B5E1919-20BB-4670-82D1-34EEBD95C3D9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"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\"}]}]}],\"references\":[{\"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\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"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\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:50:04+00:00",
      "cve": "CVE-2021-47455",
      "id": "CVE-2021-47455",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:fixed": "316",
      "product_status:known_affected": "64",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ptp: Fix possible memory leak in ptp_clock_register()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47455.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T17:30:57.924Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47455\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-10T18:55:42.625337Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-10T18:55:48.170Z\"}}], \"cna\": {\"title\": \"ptp: Fix possible memory leak in ptp_clock_register()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a33121e5487b424339636b25c35d3a180eaa5f5e\", \"lessThan\": \"f1c96d8085588e1b997a96214b409ac3be20b524\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a33121e5487b424339636b25c35d3a180eaa5f5e\", \"lessThan\": \"95c0a0c5ec8839f8f21672be786e87a100319ca8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a33121e5487b424339636b25c35d3a180eaa5f5e\", \"lessThan\": \"4225fea1cb28370086e17e82c0f69bec2779dca0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5230ef61882d2d14deb846eb6b48370694816e4c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6f5e3bb7879ee1eb71c6c3cbaaffbb0da6cd7d57\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"89e8fc989feaac00bf1a7f9a766289422e2f5768\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2dece4d6d13fe179ee3a5991811712725a56e2f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0393b8720128d5b39db8523e5bfbfc689f18c37c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bfa2e0cd3dfda64fde43c3dca3aeba298d2fe7ad\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3.16.83\", \"lessThan\": \"3.17\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.4.224\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.9.224\", \"lessThan\": \"4.10\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.14.162\", \"lessThan\": \"4.15\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.93\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.8\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}], \"programFiles\": [\"drivers/ptp/ptp_clock.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.241\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/ptp/ptp_clock.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f1c96d8085588e1b997a96214b409ac3be20b524\"}, {\"url\": \"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8\"}, {\"url\": \"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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    [\u003c00000000312ed458\u003e] __kmalloc_track_caller+0x19f/0x3a0\\n    [\u003c0000000079f6e2ff\u003e] kvasprintf+0xb5/0x150\\n    [\u003c0000000026aae54f\u003e] kvasprintf_const+0x60/0x190\\n    [\u003c00000000f323a5f7\u003e] kobject_set_name_vargs+0x56/0x150\\n    [\u003c000000004e35abdd\u003e] dev_set_name+0xc0/0x100\\n    [\u003c00000000f20cfe25\u003e] ptp_clock_register+0x9f4/0xd30 [ptp]\\n    [\u003c000000008bb9f0de\u003e] 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().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.241\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.15\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.16.83\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.224\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.224\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.162\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.93\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:20:01.562Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47455\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:20:01.562Z\", \"dateReserved\": \"2024-05-21T14:58:30.833Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T06:19:44.700Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.