{"id":"CVE-2022-50285","title":"mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages\n\nThe h->*_huge_pages counters are protected by the hugetlb_lock, but\nalloc_huge_page has a corner c…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 3e50a07b6a5fcd39df1534d3fdaca4292a65efe6","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 629c986e19fe9481227c7cdfd9a105bbc104d245","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 2b35432d324898ec41beb27031d2a1a864a4d40e","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 11993652d0b49e27272db0a37aa828d8a3a4b92b","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 568e3812b1778b4c0c229649b59977d88f400ece","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 112a005d1ded04a4b41b6d01833cc0bda90625cc","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < c828fab903725279aa9dc6ae3d44bb7e4778f92c","Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 12df140f0bdfae5dcfc81800970dd7f6f632e00c","Linux 3f5fae4d1a3189d95b02b4b45e1218df147122bc","Linux >= 4.3.6 < 4.4","Linux 4.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:08:59.508628Z"},"published":"2025-09-15","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:10:33.178Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50285","references":[{"url":"https://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6"},{"url":"https://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245"},{"url":"https://git.kernel.org/stable/c/2b35432d324898ec41beb27031d2a1a864a4d40e"},{"url":"https://git.kernel.org/stable/c/11993652d0b49e27272db0a37aa828d8a3a4b92b"},{"url":"https://git.kernel.org/stable/c/568e3812b1778b4c0c229649b59977d88f400ece"},{"url":"https://git.kernel.org/stable/c/112a005d1ded04a4b41b6d01833cc0bda90625cc"},{"url":"https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c"},{"url":"https://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00c"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.05164,"ingestedAt":"2026-11-05T22:38:31.719Z","slug":"CVE-2022-50285","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages\n\nThe h->*_huge_pages counters are protected by the hugetlb_lock, but\nalloc_huge_page has a corner case where it can decrement the counter\noutside of the lock.\n\nThis could lead to a corrupted value of h->resv_huge_pages, which we have\nobserved on our systems.\n\nTake the hugetlb_lock before decrementing h->resv_huge_pages to avoid a\npotential race.\n\n## Affected\n\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 3e50a07b6a5fcd39df1534d3fdaca4292a65efe6`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 629c986e19fe9481227c7cdfd9a105bbc104d245`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 2b35432d324898ec41beb27031d2a1a864a4d40e`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 11993652d0b49e27272db0a37aa828d8a3a4b92b`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 568e3812b1778b4c0c229649b59977d88f400ece`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 112a005d1ded04a4b41b6d01833cc0bda90625cc`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < c828fab903725279aa9dc6ae3d44bb7e4778f92c`\n- `Linux >= a88c769548047b21f76fd71e04b6a3300ff17160 < 12df140f0bdfae5dcfc81800970dd7f6f632e00c`\n- `Linux 3f5fae4d1a3189d95b02b4b45e1218df147122bc`\n- `Linux >= 4.3.6 < 4.4`\n- `Linux 4.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}