{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72194", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.911Z", "datePublished": "2026-08-15T05:53:54.125Z", "dateUpdated": "2026-08-17T05:41:20.799Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:20.799Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow\n\nindx_find_buffer() recursively descends the B+ tree index with no depth\nlimit. A crafted NTFS image with circular index node references causes\nunbounded recursion, overflowing the kernel stack and panicking the\nsystem.\n\nThis is reachable by mounting a malicious NTFS filesystem (e.g. from a\nUSB drive via desktop automount) and deleting a file whose index entry\ntriggers the rebalancing fallback path in indx_delete_entry().\n\nAdd a depth parameter and bail out with -EINVAL when it reaches the\nfnd->nodes array bound, matching the constraint already enforced by\nfnd_push() in indx_find().\n\nThe related function indx_find() was previously patched for a similar\ninfinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was\nmissed." } ], "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 - ntfs3 registers export_operations; on NAS/hybrid servers exporting an NTFS volume via nfsd or ksmbd, a remote client's unlink reaches vfs_unlink→ntfs_unlink_inode→ni_remove_name→indx_delete_entry→indx_find_buffer without any local syscall from the attacker.\nAC:L - The attacker fully controls on-disk INDEX_ENTRY VCN pointers and can craft circular B+ tree references so indx_find_buffer() recurses deterministically until stack exhaustion; no race, special heap layout, or other uncontrollable condition is required beyond presenting the image and issuing unlink.\nPR:N - Exploitation requires only supplying a malicious NTFS image later mounted by root/udisks2/automount, or write permission on an NFS/SMB-exported NTFS share (including guest/anonymous write); no init-namespace root, CAP_SYS_ADMIN, or other elevated host credentials are needed on the trigger path.\nUI:N - Once an administrator has mounted and optionally exported the NTFS volume—or desktop/kiosk automount has attached removable media—the attacker issues unlink directly; no further victim clicks, file opens, or cooperative actions beyond that standing configuration are required.\nS:U - Impact is kernel stack overflow and panic within the host kernel's security authority; this is standard local or network filesystem exploitation, not a VM escape, IOMMU bypass, or cross-scope sandbox breakout.\nC:H - Unbounded recursion overflows the kernel stack, corrupting stack memory before the guard-page fault; under overestimation guidance, kernel stack corruption is treated as potentially enabling arbitrary kernel memory disclosure or information leakage via control-data overwrite.\nI:H - Recursive stack exhaustion corrupts return addresses and adjacent stack frames on the kernel stack, plausibly enabling control-flow hijack or arbitrary kernel modification even though the immediate failure mode is a panic.\nA:H - The fix commit and call path confirm unbounded recursion overflows the kernel stack and panics the system; any kernel oops, stack guard fault, or panic from this path scores Availability High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/index.c" ], "versions": [ { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "99031d4f63c785d2a985b6a4c64c4256f7117052", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "65357a81f64cb3fbe13b4b937586755e4b3a072f", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "78612f478f9fadcec4f9b3b089970da67ffb47e9", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "908c9243ba309997b73cbda3e4c563d0fb345ee9", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "fdf50c788e0991e42a187ff75479a0df7fb752f1", "status": "affected", "versionType": "git" }, { "version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd", "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/ntfs3/index.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "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": "5.15", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/99031d4f63c785d2a985b6a4c64c4256f7117052" }, { "url": "https://git.kernel.org/stable/c/65357a81f64cb3fbe13b4b937586755e4b3a072f" }, { "url": "https://git.kernel.org/stable/c/96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34" }, { "url": "https://git.kernel.org/stable/c/78612f478f9fadcec4f9b3b089970da67ffb47e9" }, { "url": "https://git.kernel.org/stable/c/908c9243ba309997b73cbda3e4c563d0fb345ee9" }, { "url": "https://git.kernel.org/stable/c/fdf50c788e0991e42a187ff75479a0df7fb752f1" }, { "url": "https://git.kernel.org/stable/c/1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd" } ], "title": "fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow", "x_generator": { "engine": "bippy-1.2.0" } } } }