CVE-2026-90391

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90391", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.810Z", "datePublished": "2026-09-17T16:09:25.083Z", "dateUpdated": "2026-10-19T09:02:55.602Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:02:55.602Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib/test_hmm: fail dmirror_fault() when the mirrored mm is gone\n\ndmirror_fault() is called from the dmirror_read() and dmirror_write()\nretry loops after dmirror_do_read() or dmirror_do_write() finds a missing\ndevice page table entry.\n\nIf the mirrored mm has already exited, mmget_not_zero() fails. The\ncurrent code returns 0 in that case, which tells the caller that faulting\nsucceeded even though no page was faulted and no device page table entry\nwas installed. The caller then retries the same address, hits -ENOENT\nagain, and can loop forever without making progress.\n\nReturn -EFAULT instead, so the ioctl fails when the mirrored mm is no\nlonger faultable."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/test_hmm.c"], "versions": [{"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "50606ced303782f8715e2d0b98ca374ea498fa29", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "541a67f21ab807c8dbc0ea88d5a2eb73b2618090", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "d8e64ffab01e032ae29159d27230ace8cf8bdc80", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "2636569ea7c19d9a40db4a1e8d0a027bdacf1569", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "701347e31aa607f3782403151a3125729d685275", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "a2074f86fc9653831e4fb7b711bb715db330f182", "status": "affected", "versionType": "git"}, {"version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "lessThan": "6a8024511ddf4877435c34fb3d6028aa8e590649", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/test_hmm.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "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": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "5.8", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/50606ced303782f8715e2d0b98ca374ea498fa29"}, {"url": "https://git.kernel.org/stable/c/541a67f21ab807c8dbc0ea88d5a2eb73b2618090"}, {"url": "https://git.kernel.org/stable/c/d8e64ffab01e032ae29159d27230ace8cf8bdc80"}, {"url": "https://git.kernel.org/stable/c/2636569ea7c19d9a40db4a1e8d0a027bdacf1569"}, {"url": "https://git.kernel.org/stable/c/701347e31aa607f3782403151a3125729d685275"}, {"url": "https://git.kernel.org/stable/c/af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655"}, {"url": "https://git.kernel.org/stable/c/a2074f86fc9653831e4fb7b711bb715db330f182"}, {"url": "https://git.kernel.org/stable/c/6a8024511ddf4877435c34fb3d6028aa8e590649"}], "title": "lib/test_hmm: fail dmirror_fault() when the mirrored mm is gone", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["lib/test_hmm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "50606ced303782f8715e2d0b98ca374ea498fa29", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "541a67f21ab807c8dbc0ea88d5a2eb73b2618090", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "d8e64ffab01e032ae29159d27230ace8cf8bdc80", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "2636569ea7c19d9a40db4a1e8d0a027bdacf1569", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "701347e31aa607f3782403151a3125729d685275", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "a2074f86fc9653831e4fb7b711bb715db330f182", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}, {"lessThan": "6a8024511ddf4877435c34fb3d6028aa8e590649", "status": "affected", "version": "b2ef9f5a5cb37643ca5def3516c546457074b882", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["lib/test_hmm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "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": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\nlib/test_hmm: fail dmirror_fault() when the mirrored mm is gone\n\ndmirror_fault() is called from the dmirror_read() and dmirror_write()\nretry loops after dmirror_do_read() or dmirror_do_write() finds a missing\ndevice page table entry.\n\nIf the mirrored mm has already exited, mmget_not_zero() fails. The\ncurrent code returns 0 in that case, which tells the caller that faulting\nsucceeded even though no page was faulted and no device page table entry\nwas installed. The caller then retries the same address, hits -ENOENT\nagain, and can loop forever without making progress.\n\nReturn -EFAULT instead, so the ioctl fails when the mirrored mm is no\nlonger faultable."}], "id": "CVE-2026-90391", "lastModified": "2026-10-19T09:19:33.150", "metrics": {}, "published": "2026-09-17T17:17:38.653", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2636569ea7c19d9a40db4a1e8d0a027bdacf1569"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/50606ced303782f8715e2d0b98ca374ea498fa29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/541a67f21ab807c8dbc0ea88d5a2eb73b2618090"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a8024511ddf4877435c34fb3d6028aa8e590649"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/701347e31aa607f3782403151a3125729d685275"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a2074f86fc9653831e4fb7b711bb715db330f182"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d8e64ffab01e032ae29159d27230ace8cf8bdc80"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,50606ced303782f8715e2d0b98ca374ea498fa29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,541a67f21ab807c8dbc0ea88d5a2eb73b2618090)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,d8e64ffab01e032ae29159d27230ace8cf8bdc80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,2636569ea7c19d9a40db4a1e8d0a027bdacf1569)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,701347e31aa607f3782403151a3125729d685275)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,af7a6d6ec36a16a583ba2e4e9984c3cf1fe34655)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,a2074f86fc9653831e4fb7b711bb715db330f182)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2ef9f5a5cb37643ca5def3516c546457074b882,6a8024511ddf4877435c34fb3d6028aa8e590649)"}}], "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": "[5.8,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"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": "[7.2.6,7.3.0)"}}, {"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": "2026-09-19T14:00:15.418031+00:00", "title": "Kernel Denial of Service from Improper Mirror Fault Handling", "updated": "2026-09-19T17:45:17.268535+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-754"]}