{"apiVersion":"1.0","identifier":"CVE-2026-72195","description":"In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound attr_off in UpdateResidentValue against data_off In do_action()-s UpdateResidentValue case (fslog.c:3307), lrh->attr_off and lrh->redo_len come from the on-disk LRH. When they satisfy aoff + dlen < attr->res.data_off, the assignment attr->res.data_size = cpu_to_le32(aoff + dlen - data_off); underflows to ~4 GiB (e.g. 0xFFFFFFF9 when aoff=0x10, dlen=1, data_off=0x18). Subsequent code that reads attr->res.data_size to walk the resident attribute payload would then read up to 4 GiB past the 1024-byte MFT record allocation. The existing mi_enum_attr() defense in fs/ntfs3/record.c:287 catches the corrupted data_size on the next attribute walk and fails the mount, but only on the path that walks all attributes. A read site that picks an attribute by name and reads its data_size without re-validating is not covered. Validate aoff against data_off and asize at the source. Reproduced under UML+KASAN on mainline 8d90b09e6741 via pr_warn-only probe: with aoff=0x10 and data_off=0x18, the post-assignment data_size is 0xfffffff9 (mount then fails at -22 from mi_enum_attr). [almaz.alexandrovich@paragon-software.com: clang-formatted the changes]","publishedAt":"2026-08-15T06:21:38","lastModifiedAt":"2026-08-17T06:18:20","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72195","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00169,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72195","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72195","en":"https://www.redsauce.net/en/cves/CVE-2026-72195","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72195","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72195","de":"https://www.redsauce.net/de/cves/CVE-2026-72195","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72195","el":"https://www.redsauce.net/el/cves/CVE-2026-72195"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72195"}}