{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64292", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.778Z", "datePublished": "2026-07-25T08:49:31.325Z", "dateUpdated": "2026-07-25T08:49:31.325Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:31.325Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Move vevent memory allocation outside spinlock\n\nThe veventq memory allocation happens inside the spinlock. Given its depth\nis decided by the user space, this leaves a vulnerability, where userspace\ncan allocate large queues to exhaust atomic memory reserves.\n\nMove the allocation outside the spinlock and use GFP_NOWAIT, which can fail\nfast under memory pressure without dipping into the GFP_ATOMIC reserves or\ndirect-reclaiming from the threaded IRQ handler. On allocation failure,\nqueue the lost_events_header (so userspace learns of the drop) and return\n-ENOMEM so the caller learns of the kernel-side memory pressure.\n\nThis is intentionally distinct from the queue-overflow path, which also\nqueues the lost_events_header but returns 0: a full queue is an expected\nuserspace-pacing condition rather than a kernel error.\n\nA subsequent change will cap the upper bound of the veventq_depth."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/iommufd/driver.c"], "versions": [{"version": "e36ba5ab808ef6237c3148d469c8238674230e2b", "lessThan": "779480ea79551c31964e74b9aef0e730faa3aa11", "status": "affected", "versionType": "git"}, {"version": "e36ba5ab808ef6237c3148d469c8238674230e2b", "lessThan": "6c5fc40200cd0a87d66a368eee00df4d1cca946e", "status": "affected", "versionType": "git"}, {"version": "e36ba5ab808ef6237c3148d469c8238674230e2b", "lessThan": "47443565d10c51366c9382dbc8597cd6c460b8a2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/iommufd/driver.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "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": "6.15", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/779480ea79551c31964e74b9aef0e730faa3aa11"}, {"url": "https://git.kernel.org/stable/c/6c5fc40200cd0a87d66a368eee00df4d1cca946e"}, {"url": "https://git.kernel.org/stable/c/47443565d10c51366c9382dbc8597cd6c460b8a2"}], "title": "iommufd: Move vevent memory allocation outside spinlock", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e36ba5ab808ef6237c3148d469c8238674230e2b,779480ea79551c31964e74b9aef0e730faa3aa11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e36ba5ab808ef6237c3148d469c8238674230e2b,6c5fc40200cd0a87d66a368eee00df4d1cca946e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e36ba5ab808ef6237c3148d469c8238674230e2b,47443565d10c51366c9382dbc8597cd6c460b8a2)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-07-25T11:45:17.631725+00:00", "updated": "2026-07-25T11:45:17.631784+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}