[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2021-47221":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T02:53:27.892Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":19,"aliases":20,"duplicate_of":9,"upstream":21,"downstream":22,"duplicates":29,"related":30,"reserved_at":9,"published_at":31,"modified_at":32,"state":33,"summary":34,"references_raw":43,"kevs":58,"epss":59,"epss_history":62,"metrics":330,"affected":336},"CVE-2021-47221","In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slub: actually fix freelist pointer vs redzoning\n\nIt turns out that SLUB redzoning (\"slub_debug=Z\") checks from\ns->object_size rather than from s->inuse (which is normally bumped to\nmake room for the freelist pointer), so a cache created with an object\nsize less than 24 would have the freelist pointer written beyond\ns->object_size, causing the redzone to be corrupted by the freelist\npointer.  This was very visible with \"slub_debug=ZF\":\n\n  BUG test (Tainted: G    B            ): Right Redzone overwritten\n  -----------------------------------------------------------------------------\n\n  INFO: 0xffff957ead1c05de-0xffff957ead1c05df @offset=1502. First byte 0x1a instead of 0xbb\n  INFO: Slab 0xffffef3950b47000 objects=170 used=170 fp=0x0000000000000000 flags=0x8000000000000200\n  INFO: Object 0xffff957ead1c05d8 @offset=1496 fp=0xffff957ead1c0620\n\n  Redzone  (____ptrval____): bb bb bb bb bb bb bb bb               ........\n  Object   (____ptrval____): 00 00 00 00 00 f6 f4 a5               ........\n  Redzone  (____ptrval____): 40 1d e8 1a aa                        @....\n  Padding  (____ptrval____): 00 00 00 00 00 00 00 00               ........\n\nAdjust the offset to stay within s->object_size.\n\n(Note that no caches of in this size range are known to exist in the\nkernel currently.)",null,[11],{"_key":12,"id":12,"name":13,"description":14,"type":15,"status":16,"abstraction":17,"likelihood_of_exploit":9,"capec":18},"CWE-763","Release of Invalid Pointer or Reference","The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.","weakness","Incomplete","Base",[],[],[],[],[23,25,27],{"_key":24},"DEBIAN-CVE-2021-47221",{"_key":26},"RHSA-2023:2951",{"_key":28},"UBUNTU-CVE-2021-47221",[],[],"2024-05-21T14:19:27.553Z","2026-05-11T13:50:18.334Z","Analyzed",{"cisa_kev":35,"cisa_ransomware":35,"cisa_vendor":9,"epss_severity":36,"epss_score":37,"severity":38,"severity_score":39,"severity_version":40,"severity_source":41,"severity_vector":42,"severity_status":33},false,"low",0.00021,"medium",5.5,"v3.1","nvd","CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",[44,50,54],{"url":45,"sources":46,"tags":48},"https://git.kernel.org/stable/c/f6ed2357541612a13a5841b3af4dc32ed984a25f",[47,41],"cve.org",[49],"Patch",{"url":51,"sources":52,"tags":53},"https://git.kernel.org/stable/c/ce6e8bee7a3883e8008b30f5887dbb426aac6a35",[47,41],[49],{"url":55,"sources":56,"tags":57},"https://git.kernel.org/stable/c/e41a49fadbc80b60b48d3c095d9e2ee7ef7c9a8e",[47,41],[49],[],{"date":60,"score":37,"percentile":61},"2026-06-03",0.06036,[63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,109,112,115,118,121,124,127,130,133,136,139,142,145,148,151,154,157,160,163,165,168,171,174,177,180,183,186,189,192,195,198,201,204,207,210,213,216,219,221,224,227,230,233,236,239,242,245,248,251,254,257,260,263,266,269,272,275,278,281,284,287,290,293,296,299,302,305,308,311,314,317,319,321,324,327],{"date":64,"score":37,"percentile":65},"2025-11-04",0.04178,{"date":67,"score":37,"percentile":68},"2025-11-05",0.04186,{"date":70,"score":37,"percentile":71},"2025-11-06",0.04293,{"date":73,"score":37,"percentile":74},"2025-11-07",0.04294,{"date":76,"score":37,"percentile":77},"2025-11-08",0.04299,{"date":79,"score":37,"percentile":80},"2025-11-09",0.04298,{"date":82,"score":37,"percentile":83},"2025-11-10",0.04284,{"date":85,"score":37,"percentile":86},"2025-11-11",0.04318,{"date":88,"score":37,"percentile":89},"2025-11-12",0.04346,{"date":91,"score":37,"percentile":92},"2025-11-13",0.04379,{"date":94,"score":37,"percentile":95},"2025-11-14",0.04395,{"date":97,"score":37,"percentile":98},"2025-11-15",0.0442,{"date":100,"score":37,"percentile":101},"2025-11-16",0.04436,{"date":103,"score":37,"percentile":104},"2025-11-17",0.04424,{"date":106,"score":107,"percentile":108},"2025-11-18",0.00073,0.18347,{"date":110,"score":107,"percentile":111},"2025-11-19",0.18365,{"date":113,"score":107,"percentile":114},"2025-11-20",0.18343,{"date":116,"score":37,"percentile":117},"2025-11-21",0.04462,{"date":119,"score":37,"percentile":120},"2025-11-22",0.04473,{"date":122,"score":37,"percentile":123},"2025-11-23",0.04471,{"date":125,"score":37,"percentile":126},"2025-11-24",0.04446,{"date":128,"score":37,"percentile":129},"2025-11-25",0.04454,{"date":131,"score":37,"percentile":132},"2025-11-26",0.04502,{"date":134,"score":37,"percentile":135},"2025-11-27",0.04515,{"date":137,"score":37,"percentile":138},"2025-11-28",0.04504,{"date":140,"score":37,"percentile":141},"2025-11-29",0.0456,{"date":143,"score":37,"percentile":144},"2025-11-30",0.04563,{"date":146,"score":37,"percentile":147},"2025-12-01",0.04666,{"date":149,"score":37,"percentile":150},"2025-12-02",0.04681,{"date":152,"score":37,"percentile":153},"2025-12-03",0.04705,{"date":155,"score":37,"percentile":156},"2025-12-04",0.04645,{"date":158,"score":37,"percentile":159},"2025-12-05",0.0471,{"date":161,"score":37,"percentile":162},"2025-12-06",0.04726,{"date":164,"score":37,"percentile":162},"2025-12-07",{"date":166,"score":37,"percentile":167},"2025-12-08",0.04727,{"date":169,"score":37,"percentile":170},"2025-12-09",0.04774,{"date":172,"score":37,"percentile":173},"2025-12-10",0.04825,{"date":175,"score":37,"percentile":176},"2025-12-11",0.0481,{"date":178,"score":37,"percentile":179},"2025-12-12",0.04827,{"date":181,"score":37,"percentile":182},"2025-12-13",0.04865,{"date":184,"score":37,"percentile":185},"2025-12-14",0.04856,{"date":187,"score":37,"percentile":188},"2025-12-15",0.04814,{"date":190,"score":37,"percentile":191},"2025-12-16",0.0482,{"date":193,"score":37,"percentile":194},"2025-12-17",0.0488,{"date":196,"score":37,"percentile":197},"2025-12-18",0.04915,{"date":199,"score":37,"percentile":200},"2025-12-19",0.04901,{"date":202,"score":37,"percentile":203},"2025-12-20",0.04898,{"date":205,"score":37,"percentile":206},"2025-12-21",0.04919,{"date":208,"score":37,"percentile":209},"2025-12-22",0.04851,{"date":211,"score":37,"percentile":212},"2025-12-23",0.0486,{"date":214,"score":37,"percentile":215},"2025-12-24",0.04881,{"date":217,"score":37,"percentile":218},"2025-12-25",0.04917,{"date":220,"score":37,"percentile":206},"2025-12-26",{"date":222,"score":37,"percentile":223},"2025-12-27",0.04922,{"date":225,"score":37,"percentile":226},"2025-12-28",0.0491,{"date":228,"score":37,"percentile":229},"2025-12-29",0.04903,{"date":231,"score":37,"percentile":232},"2025-12-30",0.04842,{"date":234,"score":37,"percentile":235},"2025-12-31",0.04861,{"date":237,"score":37,"percentile":238},"2026-01-01",0.04943,{"date":240,"score":37,"percentile":241},"2026-01-02",0.04941,{"date":243,"score":37,"percentile":244},"2026-01-03",0.04923,{"date":246,"score":37,"percentile":247},"2026-01-04",0.04817,{"date":249,"score":37,"percentile":250},"2026-01-05",0.04749,{"date":252,"score":37,"percentile":253},"2026-01-06",0.04744,{"date":255,"score":37,"percentile":256},"2026-01-07",0.04763,{"date":258,"score":37,"percentile":259},"2026-01-08",0.04793,{"date":261,"score":37,"percentile":262},"2026-01-09",0.04789,{"date":264,"score":37,"percentile":265},"2026-01-10",0.04807,{"date":267,"score":37,"percentile":268},"2026-01-11",0.04788,{"date":270,"score":37,"percentile":271},"2026-01-12",0.04797,{"date":273,"score":37,"percentile":274},"2026-01-13",0.04787,{"date":276,"score":37,"percentile":277},"2026-01-14",0.04831,{"date":279,"score":37,"percentile":280},"2026-01-15",0.04751,{"date":282,"score":37,"percentile":283},"2026-01-16",0.04722,{"date":285,"score":37,"percentile":286},"2026-01-17",0.04725,{"date":288,"score":37,"percentile":289},"2026-01-18",0.04712,{"date":291,"score":37,"percentile":292},"2026-01-19",0.04664,{"date":294,"score":37,"percentile":295},"2026-01-20",0.04621,{"date":297,"score":37,"percentile":298},"2026-01-21",0.04613,{"date":300,"score":37,"percentile":301},"2026-01-22",0.04596,{"date":303,"score":37,"percentile":304},"2026-01-23",0.04644,{"date":306,"score":37,"percentile":307},"2026-01-24",0.04688,{"date":309,"score":37,"percentile":310},"2026-01-25",0.04689,{"date":312,"score":37,"percentile":313},"2026-01-26",0.04672,{"date":315,"score":37,"percentile":316},"2026-01-27",0.04659,{"date":318,"score":37,"percentile":156},"2026-01-28",{"date":320,"score":37,"percentile":292},"2026-01-29",{"date":322,"score":37,"percentile":323},"2026-01-30",0.04669,{"date":325,"score":37,"percentile":326},"2026-01-31",0.04653,{"date":328,"score":37,"percentile":329},"2026-02-01",0.04759,[331],{"source":41,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":332,"cvss_v4_0":9},{"baseScore":39,"baseSeverity":333,"vectorString":42,"impactScore":334,"exploitabilityScore":335},"MEDIUM",6,4.6,[337,357],{"ecosystem":9,"name":338,"vendor":339,"product":339,"cpe_part":340,"purl_type":9,"purl_namespace":9,"purl_name":9,"source":9,"versions":341},"Linux","linux","a",[342,349,352,355],{"version":343,"is_range":344,"range_type":47,"version_start":345,"version_start_type":346,"version_end":347,"version_end_type":348,"fixed_in":9},">= 89b83f282d8ba380cf2124f88106c57df49c538c, \u003C f6ed2357541612a13a5841b3af4dc32ed984a25f",true,"89b83f282d8ba380cf2124f88106c57df49c538c","including","f6ed2357541612a13a5841b3af4dc32ed984a25f","excluding",{"version":350,"is_range":344,"range_type":47,"version_start":345,"version_start_type":346,"version_end":351,"version_end_type":348,"fixed_in":9},">= 89b83f282d8ba380cf2124f88106c57df49c538c, \u003C ce6e8bee7a3883e8008b30f5887dbb426aac6a35","ce6e8bee7a3883e8008b30f5887dbb426aac6a35",{"version":353,"is_range":344,"range_type":47,"version_start":345,"version_start_type":346,"version_end":354,"version_end_type":348,"fixed_in":9},">= 89b83f282d8ba380cf2124f88106c57df49c538c, \u003C e41a49fadbc80b60b48d3c095d9e2ee7ef7c9a8e","e41a49fadbc80b60b48d3c095d9e2ee7ef7c9a8e",{"version":356,"is_range":35,"range_type":47,"version_start":356,"version_start_type":346,"version_end":356,"version_end_type":346,"fixed_in":9},"5.7",{"ecosystem":9,"name":358,"vendor":339,"product":359,"cpe_part":360,"purl_type":9,"purl_namespace":9,"purl_name":9,"source":9,"versions":361},"linux kernel","linux_kernel","o",[362,366,370,372,374,376,378,380],{"version":363,"is_range":344,"range_type":364,"version_start":356,"version_start_type":346,"version_end":365,"version_end_type":348,"fixed_in":9},"gte5.7_lt5.10.46","cpe","5.10.46",{"version":367,"is_range":344,"range_type":364,"version_start":368,"version_start_type":346,"version_end":369,"version_end_type":348,"fixed_in":9},"gte5.11_lt5.12.13","5.11","5.12.13",{"version":371,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc1",{"version":373,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc2",{"version":375,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc3",{"version":377,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc4",{"version":379,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc5",{"version":381,"is_range":35,"range_type":364,"version_start":9,"version_start_type":9,"version_end":9,"version_end_type":9,"fixed_in":9},"5.13:rc6"]