{"cve":"CVE-2021-47152","nvd":{"published":"2024-03-25T09:15:09.357","modified":"2026-08-04T10:16:48.963","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix data stream corruption\n\nMaxim reported several issues when forcing a TCP transparent proxy\nto use the MPTCP protocol for the inbound connections. He also\nprovided a clean reproducer.\n\nThe problem boils down to 'mptcp_frag_can_collapse_to()' assuming\nthat only MPTCP will use the given page_frag.\n\nIf others - e.g. the plain TCP protocol - allocate page fragments,\nwe can end-up re-using already allocated memory for mptcp_data_frag.\n\nFix the issue ensuring that the to-be-expanded data fragment is\nlocated at the current page frag end.\n\nv1 -> v2:\n - added missing fixes tag (Mat)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8","https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154","https://git.kernel.org/stable/c/3267a061096efc91eda52c2a0c61ba76e46e4b34","https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8","https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:47:51.568503435+00:00"},"epss":{"cve":"CVE-2021-47152","score":0.00243,"percentile":0.15589,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}