CVE-2026-53027

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53027", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.379Z", "datePublished": "2026-06-24T16:29:35.740Z", "dateUpdated": "2026-10-30T12:26:33.290Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:26:33.290Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()\n\nWhen a compressed or sparse attribute has its clusters frame-aligned,\nvcn is rounded down to the frame start using cmask, which can result\nin vcn != vcn0. In this case, vcn and vcn0 may reside in different\nattribute segments.\n\nThe code already handles the case where vcn is in a different segment\nby loading its runs before allocation. However, it fails to load runs\nfor vcn0 when vcn0 resides in a different segment than vcn. This causes\nrun_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was\nnever loaded into the in-memory run list, triggering the WARN_ON(1).\n\nFix this by adding a missing check for vcn0 after the existing vcn\nsegment check. If vcn0 falls outside the current segment range\n[svcn, evcn1), find and load the attribute segment containing vcn0\nbefore performing the run lookup.\n\nThe following scenario triggers the bug:\n attr_data_get_block_locked()\n vcn = vcn0 & cmask <- vcn != vcn0 after frame alignment\n load runs for vcn segment <- vcn0 segment not loaded!\n attr_allocate_clusters() <- allocation succeeds\n run_lookup_entry(vcn0) <- vcn0 not in run -> SPARSE_LCN\n WARN_ON(1) <- bug fires here!"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/attrib.c"], "versions": [{"version": "406a037d93b769bca248476bd14bbe548dc1ec35", "lessThan": "543093f65318d012850e548b241f85381b14d643", "status": "affected", "versionType": "git"}, {"version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "lessThan": "ea59d9dbc5504e29d420ac4aab774cbce39b0e69", "status": "affected", "versionType": "git"}, {"version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "lessThan": "d68a14450783ecc5fddae957ac4e1c546dfcfb73", "status": "affected", "versionType": "git"}, {"version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "lessThan": "08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147", "status": "affected", "versionType": "git"}, {"version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "lessThan": "2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54", "status": "affected", "versionType": "git"}, {"version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "lessThan": "d7ea8495fd307b58f8867acd81a1b40075b1d3ba", "status": "affected", "versionType": "git"}, {"version": "6.1.132", "lessThan": "6.1.191", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/attrib.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.1.132", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/543093f65318d012850e548b241f85381b14d643"}, {"url": "https://git.kernel.org/stable/c/ea59d9dbc5504e29d420ac4aab774cbce39b0e69"}, {"url": "https://git.kernel.org/stable/c/d68a14450783ecc5fddae957ac4e1c546dfcfb73"}, {"url": "https://git.kernel.org/stable/c/08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147"}, {"url": "https://git.kernel.org/stable/c/2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54"}, {"url": "https://git.kernel.org/stable/c/d7ea8495fd307b58f8867acd81a1b40075b1d3ba"}], "title": "fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs3/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "543093f65318d012850e548b241f85381b14d643", "status": "affected", "version": "406a037d93b769bca248476bd14bbe548dc1ec35", "versionType": "git"}, {"lessThan": "ea59d9dbc5504e29d420ac4aab774cbce39b0e69", "status": "affected", "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "versionType": "git"}, {"lessThan": "d68a14450783ecc5fddae957ac4e1c546dfcfb73", "status": "affected", "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "versionType": "git"}, {"lessThan": "08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147", "status": "affected", "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "versionType": "git"}, {"lessThan": "2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54", "status": "affected", "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "versionType": "git"}, {"lessThan": "d7ea8495fd307b58f8867acd81a1b40075b1d3ba", "status": "affected", "version": "c380b52f6c5702cc4bdda5e6d456d6c19a201a0b", "versionType": "git"}, {"lessThan": "6.1.191", "status": "affected", "version": "6.1.132", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs3/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.96", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.39", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8480507E-6181-45AC-88A3-8D7117A658F4", "versionEndExcluding": "6.2", "versionStartIncluding": "6.1.132", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5F8F4699-C05C-4ED7-8D26-696EEB5FFB09", "versionEndExcluding": "7.0.10", "versionStartIncluding": "6.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()\n\nWhen a compressed or sparse attribute has its clusters frame-aligned,\nvcn is rounded down to the frame start using cmask, which can result\nin vcn != vcn0. In this case, vcn and vcn0 may reside in different\nattribute segments.\n\nThe code already handles the case where vcn is in a different segment\nby loading its runs before allocation. However, it fails to load runs\nfor vcn0 when vcn0 resides in a different segment than vcn. This causes\nrun_lookup_entry() to return SPARSE_LCN for vcn0 since its segment was\nnever loaded into the in-memory run list, triggering the WARN_ON(1).\n\nFix this by adding a missing check for vcn0 after the existing vcn\nsegment check. If vcn0 falls outside the current segment range\n[svcn, evcn1), find and load the attribute segment containing vcn0\nbefore performing the run lookup.\n\nThe following scenario triggers the bug:\n attr_data_get_block_locked()\n vcn = vcn0 & cmask <- vcn != vcn0 after frame alignment\n load runs for vcn segment <- vcn0 segment not loaded!\n attr_allocate_clusters() <- allocation succeeds\n run_lookup_entry(vcn0) <- vcn0 not in run -> SPARSE_LCN\n WARN_ON(1) <- bug fires here!"}], "id": "CVE-2026-53027", "lastModified": "2026-10-30T13:19:09.193", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-24T17:17:14.087", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08fad5d5a26cc55c0ecb68ac59ba3be5e31f4147"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/543093f65318d012850e548b241f85381b14d643"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d68a14450783ecc5fddae957ac4e1c546dfcfb73"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d7ea8495fd307b58f8867acd81a1b40075b1d3ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea59d9dbc5504e29d420ac4aab774cbce39b0e69"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: fs/ntfs3: fix missing run load for vcn0 in attr_data_get_block_locked()", "id": "2492462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492462"}, "csaw": false, "cwe": "CWE-166", "details": ["A flaw was found in the Linux kernel's `fs/ntfs3` component. When handling compressed or sparse attributes with frame-aligned clusters, a missing run load for `vcn0` can occur if `vcn0` resides in a different attribute segment. This oversight can lead to a kernel warning (`WARN_ON(1)`) during a run lookup, potentially causing system instability or a Denial of Service (DoS). A local user could trigger this condition."], "name": "CVE-2026-53027", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "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"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53027\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53027\nhttps://lore.kernel.org/linux-cve-announce/2026062453-CVE-2026-53027-fbe3@gregkh/T"]}

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