{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47295","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-21T13:27:52.130Z","datePublished":"2024-05-21T14:35:18.696Z","dateUpdated":"2025-12-06T04:14:28.228Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-06T04:14:28.228Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix memory leak in tcindex_partial_destroy_work\n\nSyzbot reported memory leak in tcindex_set_parms(). 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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/cls_tcindex.c"],"versions":[{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"53af9c793f644d5841d84d8e0ad83bd7ab47f3e0","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77b","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"8d7924ce85bae64e7a67c366c7c50840f49f3a62","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"7a6fb69bbcb21e9ce13bdf18c008c268874f0480","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"8e9662fde6d63c78eb1350f6167f64c9d71a865b","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"cac71d27745f92ee13f0ecc668ffe151a4a9c9b1","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"f5051bcece50140abd1a11a2d36dc3ec5484fc32","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"7c183dc0af472dec33d2c0786a5e356baa8cad19","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"3abebc503a5148072052c229c6b04b329a420ecd","status":"affected","versionType":"git"},{"version":"331b72922c5f58d48fd5500acadc91777cc31970","lessThan":"372ae77cf11d11fb118cbe2d37def9dd5f826abd","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/cls_tcindex.c"],"versions":[{"version":"3.18","status":"affected"},{"version":"0","lessThan":"3.18","status":"unaffected","versionType":"semver"},{"version":"4.14.308","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.276","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.136","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.4.235","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.54","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.10.173","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.13.6","lessThanOrEqual":"5.13.*","status":"unaffected","versionType":"semver"},{"version":"5.15.100","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.18","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.5","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"5.14","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":"3.18","versionEndExcluding":"4.14.308"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"4.19.276"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.4.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.4.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.10.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.10.173"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.13.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.15.100"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.1.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"6.2.5"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/53af9c793f644d5841d84d8e0ad83bd7ab47f3e0"},{"url":"https://git.kernel.org/stable/c/01d0d2b8b4e3cf2110baba9371c0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sched: fix memory leak in tcindex_partial_destroy_work","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-400","lang":"en","description":"CWE-400 Uncontrolled Resource 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