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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. 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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\""}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: MIPS: pgalloc: reparar p\u00e9rdida de memoria causada por pgd_free() La p\u00e1gina pgd es liberada por la implementaci\u00f3n gen\u00e9rica pgd_free() desde el commit f9cb654cb550 (\"asm-generic: pgalloc: proporcionar pgd_free() gen\u00e9rico\"), sin embargo, hay escenarios en los que el sistema usa m\u00e1s de una p\u00e1gina como la tabla pgd, en tales casos la implementaci\u00f3n gen\u00e9rica pgd_free() ya no ser\u00e1 aplicable. 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{"bugzilla": {"description": "kernel: MIPS: pgalloc: fix memory leak caused by pgd_free()", "id": "2347675", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347675"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-401", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nMIPS: pgalloc: fix memory leak caused by pgd_free()\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.\nThe memory leak can be easily detected by executing shell command:\n\"while true; do ls > /dev/null; grep MemFree /proc/meminfo; done\""], "name": "CVE-2022-49210", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49210\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49210\nhttps://lore.kernel.org/linux-cve-announce/2025022619-CVE-2022-49210-6839@gregkh/T"], "threat_severity": "Moderate"}

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