CVE-2026-98775

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98775", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.369Z", "datePublished": "2026-10-18T15:48:11.317Z", "dateUpdated": "2026-10-30T12:39:42.932Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:42.932Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnitro_enclaves: fix use-after-free on SLOT_ALLOC failure\n\nWhen ne_create_vm_ioctl() fails the SLOT_ALLOC request after\nanon_inode_getfile() has succeeded, the error path calls\nfput(enclave_file) and then frees ne_enclave.\n\nIn normal userspace context, fput() defers the final __fput() via\ntask_work. ne_enclave_release() therefore runs after ne_enclave has\nalready been freed and dereferences ne_enclave->slot_uid, causing a\nuse-after-free: KASAN: slab-use-after-free in ne_enclave_release.\n\nThe enclave has no slot allocated and is not yet linked into the\nenclaves list on this error path, so ne_enclave_release() is expected\nto return early when slot_uid is zero. However, reading slot_uid\nalready accesses the freed object.\n\nClear enclave_file->private_data before fput() on the error path.\nne_enclave_release() then returns immediately when private_data is\nNULL, leaving the ioctl error path as the sole owner of ne_enclave.\nThis is safe because the file has not been fd_install()'d yet.\n\nTested on an AWS EC2 m5.2xlarge with CONFIG_KASAN=y. Without the\npatch, the reproducer triggers a KASAN slab-use-after-free on every\nSLOT_ALLOC failure. With the patch, no KASAN report is produced and\nthe SLOT_ALLOC error is still returned. Normal enclave creation and\nteardown are unaffected."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/virt/nitro_enclaves/ne_misc_dev.c"], "versions": [{"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "718965a5fcea47f7ec6accff55306317aadc3af3", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "dac89ed976d9826eae4703281d0d51b062b58eef", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "8024c50b8763add7912b6d9830327ba73f994204", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "466041d14f26dc2babd606a2e85dce08774112a6", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "43f78b328f3907ca2f7424e15b7e45ffbf9fe21c", "status": "affected", "versionType": "git"}, {"version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "lessThan": "9bc184a2eda8b773c88ecbff934001ad649b9cc1", "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/virt/nitro_enclaves/ne_misc_dev.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "5.10", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/718965a5fcea47f7ec6accff55306317aadc3af3"}, {"url": "https://git.kernel.org/stable/c/dac89ed976d9826eae4703281d0d51b062b58eef"}, {"url": "https://git.kernel.org/stable/c/8024c50b8763add7912b6d9830327ba73f994204"}, {"url": "https://git.kernel.org/stable/c/8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2"}, {"url": "https://git.kernel.org/stable/c/466041d14f26dc2babd606a2e85dce08774112a6"}, {"url": "https://git.kernel.org/stable/c/f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84"}, {"url": "https://git.kernel.org/stable/c/43f78b328f3907ca2f7424e15b7e45ffbf9fe21c"}, {"url": "https://git.kernel.org/stable/c/9bc184a2eda8b773c88ecbff934001ad649b9cc1"}], "title": "nitro_enclaves: fix use-after-free on SLOT_ALLOC failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/virt/nitro_enclaves/ne_misc_dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "718965a5fcea47f7ec6accff55306317aadc3af3", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "dac89ed976d9826eae4703281d0d51b062b58eef", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "8024c50b8763add7912b6d9830327ba73f994204", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "466041d14f26dc2babd606a2e85dce08774112a6", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "43f78b328f3907ca2f7424e15b7e45ffbf9fe21c", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}, {"lessThan": "9bc184a2eda8b773c88ecbff934001ad649b9cc1", "status": "affected", "version": "9c8eb50fe9e2bb8a2e725979e052fbf592b6b799", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/virt/nitro_enclaves/ne_misc_dev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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\nnitro_enclaves: fix use-after-free on SLOT_ALLOC failure\n\nWhen ne_create_vm_ioctl() fails the SLOT_ALLOC request after\nanon_inode_getfile() has succeeded, the error path calls\nfput(enclave_file) and then frees ne_enclave.\n\nIn normal userspace context, fput() defers the final __fput() via\ntask_work. ne_enclave_release() therefore runs after ne_enclave has\nalready been freed and dereferences ne_enclave->slot_uid, causing a\nuse-after-free: KASAN: slab-use-after-free in ne_enclave_release.\n\nThe enclave has no slot allocated and is not yet linked into the\nenclaves list on this error path, so ne_enclave_release() is expected\nto return early when slot_uid is zero. However, reading slot_uid\nalready accesses the freed object.\n\nClear enclave_file->private_data before fput() on the error path.\nne_enclave_release() then returns immediately when private_data is\nNULL, leaving the ioctl error path as the sole owner of ne_enclave.\nThis is safe because the file has not been fd_install()'d yet.\n\nTested on an AWS EC2 m5.2xlarge with CONFIG_KASAN=y. Without the\npatch, the reproducer triggers a KASAN slab-use-after-free on every\nSLOT_ALLOC failure. With the patch, no KASAN report is produced and\nthe SLOT_ALLOC error is still returned. Normal enclave creation and\nteardown are unaffected."}], "id": "CVE-2026-98775", "lastModified": "2026-10-30T13:21:27.140", "metrics": {}, "published": "2026-10-18T16:17:31.437", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43f78b328f3907ca2f7424e15b7e45ffbf9fe21c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/466041d14f26dc2babd606a2e85dce08774112a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/718965a5fcea47f7ec6accff55306317aadc3af3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8024c50b8763add7912b6d9830327ba73f994204"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bde6f643ab6fe5e3e3f4c312f84ce327ecf39b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9bc184a2eda8b773c88ecbff934001ad649b9cc1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dac89ed976d9826eae4703281d0d51b062b58eef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nitro_enclaves: fix use-after-free on SLOT_ALLOC failure", "id": "2555087", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555087"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnitro_enclaves: fix use-after-free on SLOT_ALLOC failure\nWhen ne_create_vm_ioctl() fails the SLOT_ALLOC request after\nanon_inode_getfile() has succeeded, the error path calls\nfput(enclave_file) and then frees ne_enclave.\nIn normal userspace context, fput() defers the final __fput() via\ntask_work. ne_enclave_release() therefore runs after ne_enclave has\nalready been freed and dereferences ne_enclave->slot_uid, causing a\nuse-after-free: KASAN: slab-use-after-free in ne_enclave_release.\nThe enclave has no slot allocated and is not yet linked into the\nenclaves list on this error path, so ne_enclave_release() is expected\nto return early when slot_uid is zero. However, reading slot_uid\nalready accesses the freed object.\nClear enclave_file->private_data before fput() on the error path.\nne_enclave_release() then returns immediately when private_data is\nNULL, leaving the ioctl error path as the sole owner of ne_enclave.\nThis is safe because the file has not been fd_install()'d yet.\nTested on an AWS EC2 m5.2xlarge with CONFIG_KASAN=y. Without the\npatch, the reproducer triggers a KASAN slab-use-after-free on every\nSLOT_ALLOC failure. With the patch, no KASAN report is produced and\nthe SLOT_ALLOC error is still returned. Normal enclave creation and\nteardown are unaffected.", "A flaw was found in the Linux kernel's Nitro Enclaves driver. An error-handling defect during enclave creation allows memory to be accessed after it has already been freed. A local attacker could exploit this use-after-free condition to cause a system crash, resulting in a Denial of Service (DoS), or potentially escalate privileges."], "name": "CVE-2026-98775", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98775\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98775\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98775.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9c8eb50fe9e2bb8a2e725979e052fbf592b6b799,466041d14f26dc2babd606a2e85dce08774112a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9c8eb50fe9e2bb8a2e725979e052fbf592b6b799,f7fb6c2835ede1b8ad84cf7e78a528a9d0159b84)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9c8eb50fe9e2bb8a2e725979e052fbf592b6b799,43f78b328f3907ca2f7424e15b7e45ffbf9fe21c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9c8eb50fe9e2bb8a2e725979e052fbf592b6b799,9bc184a2eda8b773c88ecbff934001ad649b9cc1)"}}], "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": "5.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "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": "2026-10-19T12:15:14.276798+00:00", "updated": "2026-10-23T19:00:23.369495+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}