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The problem was in\nnon-freed perfect hash in tcindex_partial_destroy_work().\n\nIn tcindex_set_parms() new tcindex_data is allocated and some fields from\nold one are copied to new one, but not the perfect hash. Since\ntcindex_partial_destroy_work() is the destroy function for old\ntcindex_data, we need to free perfect hash to avoid memory leak."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:03:10.169Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47295", "state": "PUBLISHED", "dateUpdated": "2024-11-04T12:03:10.169Z", "dateReserved": "2024-05-21T13:27:52.130Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:35:18.696Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

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{"bugzilla": {"description": "kernel: net: sched: fix memory leak in tcindex_partial_destroy_work", "id": "2282492", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282492"}, "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"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: sched: fix memory leak in tcindex_partial_destroy_work\nSyzbot reported memory leak in tcindex_set_parms(). The problem was in\nnon-freed perfect hash in tcindex_partial_destroy_work().\nIn tcindex_set_parms() new tcindex_data is allocated and some fields from\nold one are copied to new one, but not the perfect hash. Since\ntcindex_partial_destroy_work() is the destroy function for old\ntcindex_data, we need to free perfect hash to avoid memory leak."], "name": "CVE-2021-47295", "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:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47295\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47295\nhttps://lore.kernel.org/linux-cve-announce/2024052124-CVE-2021-47295-cc64@gregkh/T"], "threat_severity": "Low"}