CVE-2026-64415 (GCVE-0-2026-64415)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
EPSS
VEX
Title
mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup
We hit a real softlockup in an internal stress test environment. The
workload was LTP memory/swap stress on a large arm64 machine, with 320
CPUs, about 1TB memory and an 8.6GB swap device. The system was under
heavy load and the swap device had a large number of full clusters. The
softlockup was triggered during a stress test after about 3 days.
So, add periodic cond_resched() calls during large full_clusters
reclaim operations to prevent softlockup issues.
Detailed call trace as follow:
PID: 3817773 TASK: ffff0883bb28b780 CPU: 48 COMMAND: "kworker/48:7"
#0 [ffff800080183d10] __crash_kexec at ffffa4c1361e5de4
#1 [ffff800080183d90] panic at ffffa4c1360d5e9c
#2 [ffff800080183e20] watchdog_timer_fn at ffffa4c136231fa8
...
#16 [ffff8000c4ad3cb0] swap_cache_del_folio at ffffa4c1363e1614
#17 [ffff8000c4ad3ce0] __try_to_reclaim_swap at ffffa4c1363e4bfc
#18 [ffff8000c4ad3d40] swap_reclaim_full_clusters at ffffa4c1363e5474
#19 [ffff8000c4ad3da0] swap_reclaim_work at ffffa4c1363e550c
#20 [ffff8000c4ad3dc0] process_one_work at ffffa4c136102edc
#21 [ffff8000c4ad3e10] worker_thread at ffffa4c136103398
#22 [ffff8000c4ad3e70] kthread at ffffa4c13610d95c
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 , < 60cbe67d1342f34b66df1c2ee328e3cd333767d7
(git)
Affected: 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 , < 69c0e6246575b780ae0d3f411c749bcf13c221f3 (git) Affected: 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 , < 2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0 (git) Affected: 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 , < 66366d291f666ddeda5f8c84f253e308de3e6b55 (git) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
{
"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"
},
{
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"status": "affected",
"version": "5168a68eb78fa1c67a8b2d31d0642c7fd866cc12",
"versionType": "git"
},
{
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"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",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64415",
"date": "2026-07-26",
"epss": "0.00168",
"percentile": "0.06412"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-64415\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:25.343\",\"lastModified\":\"2026-07-25T10:17:25.343\",\"vulnStatus\":\"Received\",\"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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/swapfile.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12\",\"lessThan\":\"60cbe67d1342f34b66df1c2ee328e3cd333767d7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12\",\"lessThan\":\"69c0e6246575b780ae0d3f411c749bcf13c221f3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12\",\"lessThan\":\"2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5168a68eb78fa1c67a8b2d31d0642c7fd866cc12\",\"lessThan\":\"66366d291f666ddeda5f8c84f253e308de3e6b55\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/swapfile.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/60cbe67d1342f34b66df1c2ee328e3cd333767d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/66366d291f666ddeda5f8c84f253e308de3e6b55\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/69c0e6246575b780ae0d3f411c749bcf13c221f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T15:59:46Z",
"cve": "CVE-2026-64415",
"id": "CVE-2026-64415",
"initial_release_date": "2026-07-25T15:59:46Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64415",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64415.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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