CVE-2026-98223

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98223", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.327Z", "datePublished": "2026-10-06T08:44:58.472Z", "dateUpdated": "2026-10-19T09:15:55.143Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:15:55.143Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: filemap: retain mapped dropbehind folios\n\nFault-around can map ready dropbehind folios without going through the\nnormal page-cache lookup that clears dropbehind. A mapping represents a\ncompeting cached user, so retain the folio instead of forcibly unmapping\nit when writeback completes.\n\nFor a mapped folio, folio_unmap_invalidate() can call\nunmap_mapping_folio(), which takes i_mmap_rwsem and may sleep. Retaining\nmapped folios avoids this path when folio_end_dropbehind() runs in\nnon-preemptible task context.\n\nTal was able to trigger a sleeping-in-atomic warning due to this [1].\n\nUnmapped dropbehind folios continue through the existing invalidation path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/filemap.c"], "versions": [{"version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "lessThan": "2897601dffe576fcd87a4259102f41f7fb0cbfc8", "status": "affected", "versionType": "git"}, {"version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "lessThan": "77c0fade37c80e8aa16ac048a9828249055e3f66", "status": "affected", "versionType": "git"}, {"version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "lessThan": "848d2ce2fce15fbdc083fbf9691bfa72911033c4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/filemap.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "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": "6.14", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2897601dffe576fcd87a4259102f41f7fb0cbfc8"}, {"url": "https://git.kernel.org/stable/c/77c0fade37c80e8aa16ac048a9828249055e3f66"}, {"url": "https://git.kernel.org/stable/c/848d2ce2fce15fbdc083fbf9691bfa72911033c4"}], "title": "mm: filemap: retain mapped dropbehind folios", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["mm/filemap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2897601dffe576fcd87a4259102f41f7fb0cbfc8", "status": "affected", "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "versionType": "git"}, {"lessThan": "77c0fade37c80e8aa16ac048a9828249055e3f66", "status": "affected", "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "versionType": "git"}, {"lessThan": "848d2ce2fce15fbdc083fbf9691bfa72911033c4", "status": "affected", "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["mm/filemap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "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\nmm: filemap: retain mapped dropbehind folios\n\nFault-around can map ready dropbehind folios without going through the\nnormal page-cache lookup that clears dropbehind. A mapping represents a\ncompeting cached user, so retain the folio instead of forcibly unmapping\nit when writeback completes.\n\nFor a mapped folio, folio_unmap_invalidate() can call\nunmap_mapping_folio(), which takes i_mmap_rwsem and may sleep. Retaining\nmapped folios avoids this path when folio_end_dropbehind() runs in\nnon-preemptible task context.\n\nTal was able to trigger a sleeping-in-atomic warning due to this [1].\n\nUnmapped dropbehind folios continue through the existing invalidation path."}], "id": "CVE-2026-98223", "lastModified": "2026-10-19T10:18:23.073", "metrics": {}, "published": "2026-10-06T09:18:09.290", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2897601dffe576fcd87a4259102f41f7fb0cbfc8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/77c0fade37c80e8aa16ac048a9828249055e3f66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/848d2ce2fce15fbdc083fbf9691bfa72911033c4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: mm: filemap: retain mapped dropbehind folios", "id": "2546455", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546455"}, "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-821", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm: filemap: retain mapped dropbehind folios\nFault-around can map ready dropbehind folios without going through the\nnormal page-cache lookup that clears dropbehind. A mapping represents a\ncompeting cached user, so retain the folio instead of forcibly unmapping\nit when writeback completes.\nFor a mapped folio, folio_unmap_invalidate() can call\nunmap_mapping_folio(), which takes i_mmap_rwsem and may sleep. Retaining\nmapped folios avoids this path when folio_end_dropbehind() runs in\nnon-preemptible task context.\nTal was able to trigger a sleeping-in-atomic warning due to this [1].\nUnmapped dropbehind folios continue through the existing invalidation path.", "A flaw was found in the Linux kernel's memory management component. When dropbehind memory pages are mapped during read-ahead fault operations, the kernel can mistakenly attempt to execute a sleepable operation while running in an atomic, non-preemptible context upon writeback completion. A local user could exploit this flaw to cause a kernel crash, resulting in a denial of service (DoS)."], "name": "CVE-2026-98223", "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": "Out of support scope", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98223\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98223\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98223.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fb7d3bc4149395c1ae99029c852eab6c28fc3c88,2897601dffe576fcd87a4259102f41f7fb0cbfc8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fb7d3bc4149395c1ae99029c852eab6c28fc3c88,77c0fade37c80e8aa16ac048a9828249055e3f66)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fb7d3bc4149395c1ae99029c852eab6c28fc3c88,848d2ce2fce15fbdc083fbf9691bfa72911033c4)"}}], "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": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T12:15:15.079142+00:00", "updated": "2026-10-10T04:30:17.962191+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}