{"cve":"CVE-2022-49210","nvd":{"published":"2025-02-26T07:00:58.107","modified":"2026-06-17T05:17:23.590","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: pgalloc: fix memory leak caused by pgd_free()\n\npgd page is freed by generic implementation pgd_free() since commit\nf9cb654cb550 (\"asm-generic: pgalloc: provide generic pgd_free()\"),\nhowever, there are scenarios that the system uses more than one page as\nthe pgd table, in such cases the generic implementation pgd_free() won't\nbe applicable anymore. For example, when PAGE_SIZE_4KB is enabled and\nMIPS_VA_BITS_48 is not enabled in a 64bit system, the macro \"PGD_ORDER\"\nwill be set as \"1\", which will cause allocating two pages as the pgd\ntable. Well, at the same time, the generic implementation pgd_free()\njust free one pgd page, which will result in the memory leak.\n\nThe memory leak can be easily detected by executing shell command:\n\"while true; do ls > /dev/null; grep MemFree /proc/meminfo; done\"","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/1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1","https://git.kernel.org/stable/c/2bc5bab9a763d520937e4f3fe8df51c6a1eceb97","https://git.kernel.org/stable/c/5a8501d34b261906e4c76ec9da679f2cb4d309ed","https://git.kernel.org/stable/c/d29cda15cab086d82d692de016f7249545d4b6b4","https://git.kernel.org/stable/c/fa3d44424579972cc7c4fac3d9cf227798ebdfa0"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49210","score":0.00261,"percentile":0.17948,"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."]}