{"id":"CVE-2025-39727","state":"PUBLISHED","title":"mm: swap: fix potential buffer overflow in setup_clusters()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: swap: fix potential buffer overflow in setup_clusters()\n\nIn setup_swap_map(), we only ensure badpages are in range (0, last_page]. \nAs maxpages might be < last_page, setup_clusters() will encounter a buffer\noverflow when a badpage is >= maxpages.\n\nOnly call inc_cluster_info_page() for badpage which is < maxpages to fix\nthe issue.","publishedAt":"2025-09-07T15:16:17.986Z","updatedAt":"2026-05-11T21:35:06.160Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"91b370800b3f2b3dda244c0ab06719c4971190a5","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"815c528b13f2bb9b3130c13bedeabf2351a68129","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"152c1339dc13ad46f1b136e8693de15980750835","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.42","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.10","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.1","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]}],"references":["https://git.kernel.org/stable/c/91b370800b3f2b3dda244c0ab06719c4971190a5","https://git.kernel.org/stable/c/9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799","https://git.kernel.org/stable/c/815c528b13f2bb9b3130c13bedeabf2351a68129","https://git.kernel.org/stable/c/152c1339dc13ad46f1b136e8693de15980750835"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/39xxx/CVE-2025-39727.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39727","state":"PUBLISHED","datePublished":"2025-09-07T15:16:17.986Z","dateUpdated":"2026-05-11T21:35:06.160Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.118Z"},"containers":{"cna":{"title":"mm: swap: fix potential buffer overflow in setup_clusters()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: swap: fix potential buffer overflow in setup_clusters()\n\nIn setup_swap_map(), we only ensure badpages are in range (0, last_page]. \nAs maxpages might be < last_page, setup_clusters() will encounter a buffer\noverflow when a badpage is >= maxpages.\n\nOnly call inc_cluster_info_page() for badpage which is < maxpages to fix\nthe issue."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"91b370800b3f2b3dda244c0ab06719c4971190a5","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"815c528b13f2bb9b3130c13bedeabf2351a68129","versionType":"git"},{"version":"b843786b0bd01ced7fcdbf3b033d68db2f7c61b2","status":"affected","lessThan":"152c1339dc13ad46f1b136e8693de15980750835","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.42","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.10","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.1","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/swapfile.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/91b370800b3f2b3dda244c0ab06719c4971190a5"},{"url":"https://git.kernel.org/stable/c/9b01ada580ee84fb319e7ecb5fb5b1f54a9eb799"},{"url":"https://git.kernel.org/stable/c/815c528b13f2bb9b3130c13bedeabf2351a68129"},{"url":"https://git.kernel.org/stable/c/152c1339dc13ad46f1b136e8693de15980750835"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:35:06.160Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.15.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.16.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}