CVE-2026-72185

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72185", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.911Z", "datePublished": "2026-08-15T05:53:47.388Z", "dateUpdated": "2026-08-17T05:41:15.234Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:15.234Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()\n\nWhen ntfs_map_runlist_nolock() needs to look up the attribute extent\ncontaining a target VCN (ctx_needs_reset == true), it calls\nntfs_attr_lookup() and then expects the result to be a non-resident\nattribute, since only non-resident attributes have a mapping pairs\narray to decompress.\n\nA crafted NTFS image can place a resident attribute where a non-resident\none is expected, causing ntfs_attr_lookup() to succeed but return a\nresident attribute record. Previously this was caught only by a\nWARN_ON(), which does not stop execution. The code then falls through to\nread a->data.non_resident.highest_vcn from what is actually a resident\nattribute, accessing the wrong union member and corrupting the VCN range\ncheck.\n\nThe caller path triggering this warning during mount is:\n\n ntfs_map_runlist_nolock\n ntfs_empty_logfile\n load_system_files\n ntfs_fill_super\n\nIn this path ctx is NULL, so ntfs_map_runlist_nolock() allocates a\ntemporary search context internally and sets ctx_needs_reset = true.\nThe existing resident-attribute guard in the ctx != NULL branch already\nreturns -EIO silently for the same condition; make the ctx_needs_reset\npath consistent by replacing the WARN_ON() with the same -EIO error\nreturn.\n\nThis causes the crafted image to be rejected with a mount error instead\nof triggering a kernel warning."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in fs/ntfs runlist mapping reached from ntfs_fill_super\u2192ntfs_empty_logfile on mount and from VFS read/iomap paths (ntfs_attr_vcn_to_rl\u2192ntfs_map_runlist_nolock); when a classic NTFS volume is exported via ksmbd or nfsd, a remote client read triggers the same mapping code on the server without local shell access.\nAC:L - An attacker fully controls the crafted NTFS image: placing a resident $DATA extent where a non-resident one is expected makes ntfs_attr_lookup() succeed, bypasses the old WARN_ON-only guard, and deterministically drives the wrong union reads and mapping-pairs decompression with no races or victim-specific memory layout.\nPR:N - Exploitation needs only a malicious NTFS image and access to have it parsed\u2014no root on the target\u2014via udev/systemd automount of attacker USB media, CAP_SYS_ADMIN mount of a loop image, or a remote ksmbd/nfsd client with guest/anonymous read (or write) on an already-exported NTFS share.\nUI:N - Once the crafted volume is mounted (automounter, admin, or server export), a single attacker-initiated mount or remote file read that maps an affected non-resident extent triggers the bug; no further victim clicks, prompts, or confirmation are required beyond supplying the image.\nS:U - Union confusion and forged runlist handling corrupt kernel heap metadata and can issue attacker-influenced block-device writes within the same host OS security domain; impact is local privilege escalation or disk corruption, not VM/hypervisor, IOMMU, or container sandbox escape.\nC:H - WARN_ON does not stop execution; the code reads non_resident.highest_vcn and mapping_pairs_offset from a resident attribute union, then ntfs_mapping_pairs_decompress() scans attacker-controlled bytes as mapping pairs, yielding out-of-bounds kernel reads and disclosure/corruption primitives beyond a simple warning.\nI:H - Successful decompression installs an attacker-forged runlist; on rw mount ntfs_empty_logfile() uses those LCNs to write 0xff-filled clusters via ntfs_bdev_write() to arbitrary disk offsets, and heap runlist allocation from forged mapping pairs enables arbitrary kernel memory corruption and potential control-flow hijack.\nA:H - The vulnerable path continues after WARN_ON instead of returning -EIO, so malformed mapping-pair decompression and use of a corrupted runlist can provoke kernel warnings, I/O errors, oops, or panic during mount or subsequent NTFS I/O, causing high availability impact even when full exploitation is not attempted."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs/attrib.c"], "versions": [{"version": "495e90fa334828d4119061e2726af51d0a0fb4ed", "lessThan": "b397b1238a217264bb02f963a1a1eadf71906375", "status": "affected", "versionType": "git"}, {"version": "495e90fa334828d4119061e2726af51d0a0fb4ed", "lessThan": "b8d6c528e9d57d263fee1a648409f84a68b2561d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs/attrib.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "7.1", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b397b1238a217264bb02f963a1a1eadf71906375"}, {"url": "https://git.kernel.org/stable/c/b8d6c528e9d57d263fee1a648409f84a68b2561d"}], "title": "ntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b397b1238a217264bb02f963a1a1eadf71906375", "status": "affected", "version": "495e90fa334828d4119061e2726af51d0a0fb4ed", "versionType": "git"}, {"lessThan": "b8d6c528e9d57d263fee1a648409f84a68b2561d", "status": "affected", "version": "495e90fa334828d4119061e2726af51d0a0fb4ed", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()\n\nWhen ntfs_map_runlist_nolock() needs to look up the attribute extent\ncontaining a target VCN (ctx_needs_reset == true), it calls\nntfs_attr_lookup() and then expects the result to be a non-resident\nattribute, since only non-resident attributes have a mapping pairs\narray to decompress.\n\nA crafted NTFS image can place a resident attribute where a non-resident\none is expected, causing ntfs_attr_lookup() to succeed but return a\nresident attribute record. Previously this was caught only by a\nWARN_ON(), which does not stop execution. The code then falls through to\nread a->data.non_resident.highest_vcn from what is actually a resident\nattribute, accessing the wrong union member and corrupting the VCN range\ncheck.\n\nThe caller path triggering this warning during mount is:\n\n ntfs_map_runlist_nolock\n ntfs_empty_logfile\n load_system_files\n ntfs_fill_super\n\nIn this path ctx is NULL, so ntfs_map_runlist_nolock() allocates a\ntemporary search context internally and sets ctx_needs_reset = true.\nThe existing resident-attribute guard in the ctx != NULL branch already\nreturns -EIO silently for the same condition; make the ctx_needs_reset\npath consistent by replacing the WARN_ON() with the same -EIO error\nreturn.\n\nThis causes the crafted image to be rejected with a mount error instead\nof triggering a kernel warning."}], "id": "CVE-2026-72185", "lastModified": "2026-08-17T06:18:19.080", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:36.870", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b397b1238a217264bb02f963a1a1eadf71906375"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8d6c528e9d57d263fee1a648409f84a68b2561d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()", "id": "2516379", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516379"}, "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-843", "details": ["A flaw was found in the Linux kernel's NTFS filesystem driver. A specially crafted NTFS image could cause the system to incorrectly process attribute data during mounting. This could lead to a kernel warning and corruption of internal data structures, potentially resulting in system instability or a denial of service (DoS) by preventing the image from being mounted."], "name": "CVE-2026-72185", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72185\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72185\nhttps://lore.kernel.org/linux-cve-announce/2026081540-CVE-2026-72185-c4f6@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[495e90fa334828d4119061e2726af51d0a0fb4ed,b397b1238a217264bb02f963a1a1eadf71906375)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[495e90fa334828d4119061e2726af51d0a0fb4ed,b8d6c528e9d57d263fee1a648409f84a68b2561d)"}}], "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": "[7.1,7.1]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "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": "2026-08-15T16:15:03.395292+00:00", "updated": "2026-08-18T19:45:03.305490+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}