{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64472", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.790Z", "datePublished": "2026-07-25T08:51:35.978Z", "dateUpdated": "2026-07-25T08:51:35.978Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:51:35.978Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/mlx5: Fix racy bitfields and tighten struct layout\n\nBitfield operations are not atomic, they use a read-modify-write\npattern, therefore we should be careful not to pack bitfields that\ncan be concurrently updated into the same storage unit.\n\nThis split takes a binary approach: flags that are only modified\npre/post open/close remain bitfields, flags modified from user\naction, including actions that reach across to another device (ex.\nreset) use dedicated storage units.\n\nNote mlx5_vhca_page_tracker.status is relocated to fill the alignment\nhole this split exposes.\n\nBitfield justifications:\n\n migrate_cap: written only in mlx5vf_cmd_set_migratable() at probe\n chunk_mode: written only in mlx5vf_cmd_set_migratable() at probe\n mig_state_cap: written only in mlx5vf_cmd_set_migratable() at probe\n\nDedicated storage units:\n\n mdev_detach: written in the VF attach/detach event notifier\n mlx5fv_vf_event() at runtime\n log_active: written in mlx5vf_start_page_tracker()/\n mlx5vf_stop_page_tracker() during runtime dirty tracking\n deferred_reset: written in mlx5vf_state_mutex_unlock()/\n mlx5vf_pci_aer_reset_done() during runtime reset handling\n is_err: set by tracker error handling and dirty-log polling at runtime\n object_changed: set by tracker event handling and cleared by dirty-log\n polling at runtime"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vfio/pci/mlx5/cmd.h"], "versions": [{"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "1dd99b8f4e143592e12e5a77e7b538bc698116cb", "status": "affected", "versionType": "git"}, {"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "f1db80a67da928a92ba460ede1be52d8941f46be", "status": "affected", "versionType": "git"}, {"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "399d806f998f7a25405fc1b97227e579aead24af", "status": "affected", "versionType": "git"}, {"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "7ed120b1a007bace57c461805519d70e1af44e59", "status": "affected", "versionType": "git"}, {"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "39d163627b51886492bf31f66cb02c94613d2287", "status": "affected", "versionType": "git"}, {"version": "61a2f1460fd03285ea34c1a235f2f50f71e13a1f", "lessThan": "f2365a63b02ddea32e7db78b742c2503ec7b81f1", "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/vfio/pci/mlx5/cmd.h"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "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-rc2", "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": "5.19", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.2-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1dd99b8f4e143592e12e5a77e7b538bc698116cb"}, {"url": "https://git.kernel.org/stable/c/f1db80a67da928a92ba460ede1be52d8941f46be"}, {"url": "https://git.kernel.org/stable/c/399d806f998f7a25405fc1b97227e579aead24af"}, {"url": "https://git.kernel.org/stable/c/7ed120b1a007bace57c461805519d70e1af44e59"}, {"url": "https://git.kernel.org/stable/c/39d163627b51886492bf31f66cb02c94613d2287"}, {"url": "https://git.kernel.org/stable/c/f2365a63b02ddea32e7db78b742c2503ec7b81f1"}], "title": "vfio/mlx5: Fix racy bitfields and tighten struct layout", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: vfio/mlx5: Fix racy bitfields and tighten struct layout", "id": "2507207", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507207"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-663", "details": ["A flaw was found in the Linux kernel's vfio/mlx5 subsystem. This vulnerability arises from non-atomic bitfield operations, where multiple updates to shared data structures can occur concurrently. This race condition may lead to unexpected behavior or data corruption due to inconsistent state, potentially impacting system stability or integrity."], "name": "CVE-2026-64472", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64472\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64472\nhttps://lore.kernel.org/linux-cve-announce/2026072546-CVE-2026-64472-265d@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,1dd99b8f4e143592e12e5a77e7b538bc698116cb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,f1db80a67da928a92ba460ede1be52d8941f46be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,399d806f998f7a25405fc1b97227e579aead24af)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,7ed120b1a007bace57c461805519d70e1af44e59)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,39d163627b51886492bf31f66cb02c94613d2287)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[61a2f1460fd03285ea34c1a235f2f50f71e13a1f,f2365a63b02ddea32e7db78b742c2503ec7b81f1)"}}], "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": "5.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0]"}}, {"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-rc2,*]"}}], "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": "2026-07-25T20:00:04.763313+00:00", "updated": "2026-08-02T12:30:05.807565+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}