{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-72193", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72193", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T05:53:53.381Z", "updatedAt": "2026-08-17T05:10:01.666Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ntfs3: cap RESTART_TABLE free-chain walker at rt->used", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: cap RESTART_TABLE free-chain walker at rt->used\n\nA crafted NTFS3 disk image triggers an in-kernel infinite loop at\nmount time, hanging the mounting thread and firing the soft-lockup\nwatchdog within ~22s on multi-CPU hosts (panic with\nkernel.softlockup_panic=1). The bug is reachable from desktop USB\nauto-mount on distributions where udisks2 routes the NTFS signature\nto the in-tree ntfs3 driver (Arch family and an increasing fraction\nof Fedora / openSUSE / RHEL deployments); CAP_SYS_ADMIN-class manual\nmount elsewhere.\n\ncheck_rstbl()'s second walker iterates the free-entry singly-linked\nlist headed by rt->first_free with no upper bound on iteration count:\n\n for (off = ff; off;) {\n if (off == RESTART_ENTRY_ALLOCATED)\n return false;\n off = le32_to_cpu(*(__le32 *)Add2Ptr(rt, off));\n if (off > ts - sizeof(__le32))\n return false;\n }\n\nThe existing guards cover three exits: end-of-list (off == 0), the\nin-use marker (off == RESTART_ENTRY_ALLOCATED), and out-of-bounds\n(off > ts - sizeof(__le32)). None of the three prevents an\nin-bounds cycle.\n\nA crafted on-disk RESTART_TABLE whose free chain contains a\nself-loop or A->B->A cycle whose offsets satisfy:\n\n - in range [sizeof(struct RESTART_TABLE), ts - sizeof(__le32)]\n - (off - sizeof(struct RESTART_TABLE)) % rsize == 0\n\npasses all existing guards and spins the mount-time thread forever.\nReproduced in UML by hand-forging a 2 MB NTFS3 image whose journal\nRESTART_TABLE first_free = 0x18 and whose entry at offset 0x18\nstores 0x18 as its next pointer; mount of the forged image with\nthe in-tree ntfs3 driver never returns.\n\nBound the walker by rt->used. Each entry on a legitimate free\nchain is unique, and the total slot count is ne = le16_to_cpu\n(rt->used). A traversal that visits more than ne slots is by\nconstruction malformed; reject it as a corrupt RESTART_TABLE.\n\nAfter this patch, mount of the forged image returns with -EINVAL\nand a log_replay failure message, and mkntfs-produced legitimate\nimages mount cleanly (verified in the same UML harness).", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "8128bec895075253c779d67afdc90ae513265fca" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "7972df425687daa70d971fe6ed415e78683133dd" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "7ac4c86915c24c208a0f0611b71d9676686fe756" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "29b86dbe88cbbef53bb9aaec2e279359f8c450f8" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "0fad25687d4d3fa1fdd313d31b9cb5817c425029" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "d313416280d41bea272f02a6034dfa88008692a0" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "status": "affected", "versionType": "git", "lessThan": "9611f644302c07d21bc8af97e3e06a3d30064253" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.15" }, { "version": "5.15.212", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.178", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.145", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.97", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }