{"api_version":"1","generated_at":"2026-07-26T14:10:00+00:00","cve":"CVE-2026-64415","urls":{"html":"https://cve.report/CVE-2026-64415","api":"https://cve.report/api/cve/CVE-2026-64415.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64415","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64415"},"summary":{"title":"mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup\n\nWe hit a real softlockup in an internal stress test environment.  The\nworkload was LTP memory/swap stress on a large arm64 machine, with 320\nCPUs, about 1TB memory and an 8.6GB swap device.  The system was under\nheavy load and the swap device had a large number of full clusters.  The\nsoftlockup was triggered during a stress test after about 3 days.\n\nSo, add periodic cond_resched() calls during large full_clusters\nreclaim operations to prevent softlockup issues.\n\nDetailed call trace as follow:\n\nPID: 3817773  TASK: ffff0883bb28b780  CPU: 48   COMMAND: \"kworker/48:7\"\n   #0 [ffff800080183d10] __crash_kexec at ffffa4c1361e5de4\n   #1 [ffff800080183d90] panic at ffffa4c1360d5e9c\n   #2 [ffff800080183e20] watchdog_timer_fn at ffffa4c136231fa8\n   ...\n  #16 [ffff8000c4ad3cb0] swap_cache_del_folio at ffffa4c1363e1614\n  #17 [ffff8000c4ad3ce0] __try_to_reclaim_swap at ffffa4c1363e4bfc\n  #18 [ffff8000c4ad3d40] swap_reclaim_full_clusters at ffffa4c1363e5474\n  #19 [ffff8000c4ad3da0] swap_reclaim_work at ffffa4c1363e550c\n  #20 [ffff8000c4ad3dc0] process_one_work at ffffa4c136102edc\n  #21 [ffff8000c4ad3e10] worker_thread at ffffa4c136103398\n  #22 [ffff8000c4ad3e70] kthread at ffffa4c13610d95c","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:25","updated_at":"2026-07-25 10:17:25"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55","name":"https://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7","name":"https://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3","name":"https://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0","name":"https://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64415","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64415","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 60cbe67d1342f34b66df1c2ee328e3cd333767d7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 69c0e6246575b780ae0d3f411c749bcf13c221f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 66366d291f666ddeda5f8c84f253e308de3e6b55 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64415","cve":"CVE-2026-64415","epss":"0.002090000","percentile":"0.111650000","score_date":"2026-07-25","updated_at":"2026-07-26 00:12:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/swapfile.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"60cbe67d1342f34b66df1c2ee328e3cd333767d7","status":"affected","version":"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12","versionType":"git"},{"lessThan":"69c0e6246575b780ae0d3f411c749bcf13c221f3","status":"affected","version":"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12","versionType":"git"},{"lessThan":"2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0","status":"affected","version":"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12","versionType":"git"},{"lessThan":"66366d291f666ddeda5f8c84f253e308de3e6b55","status":"affected","version":"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["mm/swapfile.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup\n\nWe hit a real softlockup in an internal stress test environment.  The\nworkload was LTP memory/swap stress on a large arm64 machine, with 320\nCPUs, about 1TB memory and an 8.6GB swap device.  The system was under\nheavy load and the swap device had a large number of full clusters.  The\nsoftlockup was triggered during a stress test after about 3 days.\n\nSo, add periodic cond_resched() calls during large full_clusters\nreclaim operations to prevent softlockup issues.\n\nDetailed call trace as follow:\n\nPID: 3817773  TASK: ffff0883bb28b780  CPU: 48   COMMAND: \"kworker/48:7\"\n   #0 [ffff800080183d10] __crash_kexec at ffffa4c1361e5de4\n   #1 [ffff800080183d90] panic at ffffa4c1360d5e9c\n   #2 [ffff800080183e20] watchdog_timer_fn at ffffa4c136231fa8\n   ...\n  #16 [ffff8000c4ad3cb0] swap_cache_del_folio at ffffa4c1363e1614\n  #17 [ffff8000c4ad3ce0] __try_to_reclaim_swap at ffffa4c1363e4bfc\n  #18 [ffff8000c4ad3d40] swap_reclaim_full_clusters at ffffa4c1363e5474\n  #19 [ffff8000c4ad3da0] swap_reclaim_work at ffffa4c1363e550c\n  #20 [ffff8000c4ad3dc0] process_one_work at ffffa4c136102edc\n  #21 [ffff8000c4ad3e10] worker_thread at ffffa4c136103398\n  #22 [ffff8000c4ad3e70] kthread at ffffa4c13610d95c"}],"providerMetadata":{"dateUpdated":"2026-07-25T08:50:55.226Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7"},{"url":"https://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3"},{"url":"https://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0"},{"url":"https://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55"}],"title":"mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64415","datePublished":"2026-07-25T08:50:55.226Z","dateReserved":"2026-07-19T15:36:31.786Z","dateUpdated":"2026-07-25T08:50:55.226Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:25","lastModifiedDate":"2026-07-25 10:17:25","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64415","Ordinal":"1","Title":"mm/swap: add cond_resched() in swap_reclaim_full_clusters to pre","CVE":"CVE-2026-64415","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64415","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup\n\nWe hit a real softlockup in an internal stress test environment.  The\nworkload was LTP memory/swap stress on a large arm64 machine, with 320\nCPUs, about 1TB memory and an 8.6GB swap device.  The system was under\nheavy load and the swap device had a large number of full clusters.  The\nsoftlockup was triggered during a stress test after about 3 days.\n\nSo, add periodic cond_resched() calls during large full_clusters\nreclaim operations to prevent softlockup issues.\n\nDetailed call trace as follow:\n\nPID: 3817773  TASK: ffff0883bb28b780  CPU: 48   COMMAND: \"kworker/48:7\"\n   #0 [ffff800080183d10] __crash_kexec at ffffa4c1361e5de4\n   #1 [ffff800080183d90] panic at ffffa4c1360d5e9c\n   #2 [ffff800080183e20] watchdog_timer_fn at ffffa4c136231fa8\n   ...\n  #16 [ffff8000c4ad3cb0] swap_cache_del_folio at ffffa4c1363e1614\n  #17 [ffff8000c4ad3ce0] __try_to_reclaim_swap at ffffa4c1363e4bfc\n  #18 [ffff8000c4ad3d40] swap_reclaim_full_clusters at ffffa4c1363e5474\n  #19 [ffff8000c4ad3da0] swap_reclaim_work at ffffa4c1363e550c\n  #20 [ffff8000c4ad3dc0] process_one_work at ffffa4c136102edc\n  #21 [ffff8000c4ad3e10] worker_thread at ffffa4c136103398\n  #22 [ffff8000c4ad3e70] kthread at ffffa4c13610d95c","Type":"Description","Title":"mm/swap: add cond_resched() in swap_reclaim_full_clusters to pre"}]}}}