CVE-2026-93238

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93238", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.095Z", "datePublished": "2026-09-24T15:34:11.543Z", "dateUpdated": "2026-10-19T09:07:49.811Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:07:49.811Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap\n\nThe DECLARE_BITMAP(apm_filtered, AP_DEVICES) macro allocates the bitmap\non the stack without zero-initializing it.\n\nIn vfio_ap_mdev_hot_plug_cfg(), the vfio_ap_mdev_filter_matrix() function\nis only called to initialize and populate apm_filtered if either\nfilter_adapters or filter_domains is true. If the hot plug configuration\nchange only adds control domains (meaning filter_cdoms is true, but\nfilter_adapters and filter_domains are both false),\nvfio_ap_mdev_filter_matrix() is bypassed.\n\nConsequently, apm_filtered is passed to reset_queues_for_apids() with\nuninitialized stack garbage. This can cause reset_queues_for_apids() to\ninterpret arbitrary stack garbage bits as valid APIDs to reset, potentially\nperforming unintended guest hardware queue resets.\n\nFix this by zero-initializing the apm_filtered bitmap at the beginning of\nvfio_ap_mdev_hot_plug_cfg() using bitmap_zero()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "versions": [{"version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "lessThan": "4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2", "status": "affected", "versionType": "git"}, {"version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "lessThan": "f73db632524320d2b93bc8534be8ea875053502d", "status": "affected", "versionType": "git"}, {"version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "lessThan": "6d554f2571e6b4db242593ba561efd6a6d1f99a9", "status": "affected", "versionType": "git"}, {"version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "lessThan": "09548edc6114f1eb1035b30795e893204ef45b85", "status": "affected", "versionType": "git"}, {"version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "lessThan": "bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7", "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/s390/crypto/vfio_ap_ops.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2"}, {"url": "https://git.kernel.org/stable/c/f73db632524320d2b93bc8534be8ea875053502d"}, {"url": "https://git.kernel.org/stable/c/6d554f2571e6b4db242593ba561efd6a6d1f99a9"}, {"url": "https://git.kernel.org/stable/c/09548edc6114f1eb1035b30795e893204ef45b85"}, {"url": "https://git.kernel.org/stable/c/bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7"}], "title": "s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2", "status": "affected", "version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "versionType": "git"}, {"lessThan": "f73db632524320d2b93bc8534be8ea875053502d", "status": "affected", "version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "versionType": "git"}, {"lessThan": "6d554f2571e6b4db242593ba561efd6a6d1f99a9", "status": "affected", "version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "versionType": "git"}, {"lessThan": "09548edc6114f1eb1035b30795e893204ef45b85", "status": "affected", "version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "versionType": "git"}, {"lessThan": "bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7", "status": "affected", "version": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/s390/crypto/vfio_ap_ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap\n\nThe DECLARE_BITMAP(apm_filtered, AP_DEVICES) macro allocates the bitmap\non the stack without zero-initializing it.\n\nIn vfio_ap_mdev_hot_plug_cfg(), the vfio_ap_mdev_filter_matrix() function\nis only called to initialize and populate apm_filtered if either\nfilter_adapters or filter_domains is true. If the hot plug configuration\nchange only adds control domains (meaning filter_cdoms is true, but\nfilter_adapters and filter_domains are both false),\nvfio_ap_mdev_filter_matrix() is bypassed.\n\nConsequently, apm_filtered is passed to reset_queues_for_apids() with\nuninitialized stack garbage. This can cause reset_queues_for_apids() to\ninterpret arbitrary stack garbage bits as valid APIDs to reset, potentially\nperforming unintended guest hardware queue resets.\n\nFix this by zero-initializing the apm_filtered bitmap at the beginning of\nvfio_ap_mdev_hot_plug_cfg() using bitmap_zero()."}], "id": "CVE-2026-93238", "lastModified": "2026-10-19T10:17:14.913", "metrics": {}, "published": "2026-09-24T16:17:19.563", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/09548edc6114f1eb1035b30795e893204ef45b85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d554f2571e6b4db242593ba561efd6a6d1f99a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f73db632524320d2b93bc8534be8ea875053502d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eeb386aeb5b7c8d2dae6a3ba49255d8a97803182,4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eeb386aeb5b7c8d2dae6a3ba49255d8a97803182,f73db632524320d2b93bc8534be8ea875053502d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eeb386aeb5b7c8d2dae6a3ba49255d8a97803182,6d554f2571e6b4db242593ba561efd6a6d1f99a9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eeb386aeb5b7c8d2dae6a3ba49255d8a97803182,09548edc6114f1eb1035b30795e893204ef45b85)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eeb386aeb5b7c8d2dae6a3ba49255d8a97803182,bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7)"}}], "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": "semver", "value": "[6.0,6.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-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": "2026-09-25T04:45:15.897655+00:00", "updated": "2026-09-25T10:45:18.258091+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-457"]}