{"cve":"CVE-2021-47537","nvd":{"published":"2024-05-24T15:15:17.543","modified":"2026-06-17T04:17:43.047","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: Fix a memleak bug in rvu_mbox_init()\n\nIn rvu_mbox_init(), mbox_regions is not freed or passed out\nunder the switch-default region, which could lead to a memory leak.\n\nFix this bug by changing 'return err' to 'goto free_regions'.\n\nThis bug was found by a static analyzer. The analysis employs\ndifferential checking to identify inconsistent security operations\n(e.g., checks or kfrees) between two code paths and confirms that the\ninconsistent operations are not recovered in the current function or\nthe callers, so they constitute bugs.\n\nNote that, as a bug found by static analysis, it can be a false\npositive or hard to trigger. Multiple researchers have cross-reviewed\nthe bug.\n\nBuilds with CONFIG_OCTEONTX2_AF=y show no new warnings,\nand our static analyzer no longer warns about this code.","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-401"],"references":["https://git.kernel.org/stable/c/1c0ddef45b7e3dbe3ed073695d20faa572b7056a","https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15","https://git.kernel.org/stable/c/1c0ddef45b7e3dbe3ed073695d20faa572b7056a","https://git.kernel.org/stable/c/e07a097b4986afb8f925d0bb32612e1d3e88ce15"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47537","score":0.00193,"percentile":0.09071,"date":"2026-10-31"},"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."]}