{"id":"CVE-2021-47516","state":"PUBLISHED","title":"nfp: Fix memory leak in nfp_cpp_area_cache_add()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfp: Fix memory leak in nfp_cpp_area_cache_add()\n\nIn line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a\nCPP area structure. But in line 807 (#2), when the cache is allocated\nfailed, this CPP area structure is not freed, which will result in\nmemory leak.\n\nWe can fix it by freeing the CPP area when the cache is allocated\nfailed (#2).\n\n792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size)\n793 {\n794 \tstruct nfp_cpp_area_cache *cache;\n795 \tstruct nfp_cpp_area *area;\n\n800\tarea = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0),\n801 \t\t\t\t  0, size);\n\t// #1: allocates and initializes\n\n802 \tif (!area)\n803 \t\treturn -ENOMEM;\n\n805 \tcache = kzalloc(sizeof(*cache), GFP_KERNEL);\n806 \tif (!cache)\n807 \t\treturn -ENOMEM; // #2: missing free\n\n817\treturn 0;\n818 }","publishedAt":"2024-05-24T15:09:30.022Z","updatedAt":"2026-05-11T13:56:10.428Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"3e93abcdcec0436fbf0b6a88ae806902426895a2","versionType":"git"},{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"eb51f639ef3fd5498b7def290ed8681b6aadd9a7","versionType":"git"},{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"2e0e072e62fdaf7816220af08e05c020f0fcb77a","versionType":"git"},{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"484069b5de9d223cc1c64c6f80389a99cfef51f1","versionType":"git"},{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"f707820c09239d6f67699d9b2ff57863cc7905b0","versionType":"git"},{"version":"4cb584e0ee7df70fd0376aee60cf701855ea8c81","status":"affected","lessThan":"c56c96303e9289cc34716b1179597b6f470833de","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"4.14.258","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.221","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.165","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.85","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.8","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c"]}],"references":["https://git.kernel.org/stable/c/3e93abcdcec0436fbf0b6a88ae806902426895a2","https://git.kernel.org/stable/c/eb51f639ef3fd5498b7def290ed8681b6aadd9a7","https://git.kernel.org/stable/c/2e0e072e62fdaf7816220af08e05c020f0fcb77a","https://git.kernel.org/stable/c/484069b5de9d223cc1c64c6f80389a99cfef51f1","https://git.kernel.org/stable/c/f707820c09239d6f67699d9b2ff57863cc7905b0","https://git.kernel.org/stable/c/c56c96303e9289cc34716b1179597b6f470833de"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47516.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47516","state":"PUBLISHED","datePublished":"2024-05-24T15:09:30.022Z","dateUpdated":"2026-05-11T13:56:10.428Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-24T15:02:54.824Z"},"containers":{"cna":{"title":"nfp: Fix memory leak in nfp_cpp_area_cache_add()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfp: Fix memory leak in nfp_cpp_area_cache_add()\n\nIn line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a\nCPP area structure. But in line 807 (#2), when the cache is allocated\nfailed, this CPP area structure is not freed, which will result in\nmemory leak.\n\nWe can fix it by freeing the CPP area when the cache is allocated\nfailed (#2).\n\n792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size)\n793 {\n794 \tstruct nfp_cpp_area_cache *cache;\n795 \tstruct nfp_cpp_area *area;\n\n800\tarea = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0),\n801 \t\t\t\t  0, size);\n\t// #1: allocates and initializes\n\n802 \tif (!area)\n803 \t\treturn -ENOMEM;\n\n805 \tcache = kzalloc(sizeof(*cache), GFP_KERNEL);\n806 \tif (!cache)\n807 \t\treturn -ENOMEM; // #2: missing free\n\n817\treturn 0;\n818 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