{"id":"CVE-2025-38258","title":"mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write\n\nmemcg_path_store() assigns a newly allocated memory buffer to\nfilter->memcg_path, witho…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 490a43d07f1663d827e802720d30cbc0494e4f81","Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < c5d5b0047b0c0f304608f3824139f7bd34c48413","Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1","Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 4f489fe6afb395dbc79840efa3c05440b760d883","Linux 6.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:52:32.042583Z"},"published":"2025-07-09","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:02:29.481Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38258","references":[{"url":"https://git.kernel.org/stable/c/490a43d07f1663d827e802720d30cbc0494e4f81"},{"url":"https://git.kernel.org/stable/c/c5d5b0047b0c0f304608f3824139f7bd34c48413"},{"url":"https://git.kernel.org/stable/c/4a158ac0538dd5695eeaa00aa0720d711f3e4ef1"},{"url":"https://git.kernel.org/stable/c/4f489fe6afb395dbc79840efa3c05440b760d883"}],"tags":["cve.org"],"epss":0.00166,"epssPercentile":0.05828,"ingestedAt":"2026-11-05T22:38:31.943Z","slug":"CVE-2025-38258","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write\n\nmemcg_path_store() assigns a newly allocated memory buffer to\nfilter->memcg_path, without deallocating the previously allocated and\nassigned memory buffer.  As a result, users can leak kernel memory by\ncontinuously writing a data to memcg_path DAMOS sysfs file.  Fix the leak\nby deallocating the previously set memory buffer.\n\n## Affected\n\n- `Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 490a43d07f1663d827e802720d30cbc0494e4f81`\n- `Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < c5d5b0047b0c0f304608f3824139f7bd34c48413`\n- `Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1`\n- `Linux >= 7ee161f18b5da5170b5d6a51aace49d312099128 < 4f489fe6afb395dbc79840efa3c05440b760d883`\n- `Linux 6.3`\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":[]}