CVE-2026-64415

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64415", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.786Z", "datePublished": "2026-07-25T08:50:55.226Z", "dateUpdated": "2026-08-17T04:55:14.532Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:55:14.532Z"}, "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"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/swapfile.c"], "versions": [{"version": "5168a68eb78fa1c67a8b2d31d0642c7fd866cc12", "lessThan": "60cbe67d1342f34b66df1c2ee328e3cd333767d7", "status": "affected", "versionType": "git"}, {"version": "5168a68eb78fa1c67a8b2d31d0642c7fd866cc12", "lessThan": "69c0e6246575b780ae0d3f411c749bcf13c221f3", "status": "affected", "versionType": "git"}, {"version": "5168a68eb78fa1c67a8b2d31d0642c7fd866cc12", "lessThan": "2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0", "status": "affected", "versionType": "git"}, {"version": "5168a68eb78fa1c67a8b2d31d0642c7fd866cc12", "lessThan": "66366d291f666ddeda5f8c84f253e308de3e6b55", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/swapfile.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CBBA6A45-1AE0-490C-81FF-2823857B0E37", "versionEndExcluding": "6.12.96", "versionStartIncluding": "6.12.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7", "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42", "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*", "matchCriteriaId": "0E698080-7669-4132-8817-4C674EEBCE54", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*", "matchCriteriaId": "24B88717-53F5-42AA-9B72-14C707639E3F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc7:*:*:*:*:*:*", "matchCriteriaId": "1EF8CD82-1EAE-4254-9545-F85AB94CF90F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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"}], "id": "CVE-2026-64415", "lastModified": "2026-09-04T15:25:09.633", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-25T10:17:25.343", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service due to softlockup in memory swap reclaim", "id": "2507050", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507050"}, "csaw": false, "cwe": "CWE-770", "details": ["A flaw was found in the Linux kernel's memory management (mm/swap) component. Under heavy memory and swap stress, a local attacker could trigger a softlockup during large swap cluster reclaim operations. This vulnerability can lead to a Denial of Service (DoS), making the system unresponsive."], "name": "CVE-2026-64415", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T08:50:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64415\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64415\nhttps://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0\nhttps://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7\nhttps://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55\nhttps://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5168a68eb78fa1c67a8b2d31d0642c7fd866cc12,60cbe67d1342f34b66df1c2ee328e3cd333767d7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5168a68eb78fa1c67a8b2d31d0642c7fd866cc12,69c0e6246575b780ae0d3f411c749bcf13c221f3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5168a68eb78fa1c67a8b2d31d0642c7fd866cc12,2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5168a68eb78fa1c67a8b2d31d0642c7fd866cc12,66366d291f666ddeda5f8c84f253e308de3e6b55)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T17:15:03.587996+00:00", "updated": "2026-09-04T16:30:06.530780+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}