{"id":"CVE-2025-38258","state":"PUBLISHED","title":"mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write","description":"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, 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.","publishedAt":"2025-07-09T10:42:35.000Z","updatedAt":"2026-05-11T21:24:19.236Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"490a43d07f1663d827e802720d30cbc0494e4f81","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"c5d5b0047b0c0f304608f3824139f7bd34c48413","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"4a158ac0538dd5695eeaa00aa0720d711f3e4ef1","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"4f489fe6afb395dbc79840efa3c05440b760d883","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/sysfs-schemes.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.96","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.36","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.5","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/sysfs-schemes.c"]}],"references":["https://git.kernel.org/stable/c/490a43d07f1663d827e802720d30cbc0494e4f81","https://git.kernel.org/stable/c/c5d5b0047b0c0f304608f3824139f7bd34c48413","https://git.kernel.org/stable/c/4a158ac0538dd5695eeaa00aa0720d711f3e4ef1","https://git.kernel.org/stable/c/4f489fe6afb395dbc79840efa3c05440b760d883"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38258.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38258","state":"PUBLISHED","datePublished":"2025-07-09T10:42:35.000Z","dateUpdated":"2026-05-11T21:24:19.236Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.997Z"},"containers":{"cna":{"title":"mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write","descriptions":[{"lang":"en","value":"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, 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"490a43d07f1663d827e802720d30cbc0494e4f81","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"c5d5b0047b0c0f304608f3824139f7bd34c48413","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"4a158ac0538dd5695eeaa00aa0720d711f3e4ef1","versionType":"git"},{"version":"7ee161f18b5da5170b5d6a51aace49d312099128","status":"affected","lessThan":"4f489fe6afb395dbc79840efa3c05440b760d883","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/sysfs-schemes.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.96","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.36","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.5","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/damon/sysfs-schemes.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:24:19.236Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.6.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.15.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}