CVE-2025-22081

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Fix it by using size_add()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable parser only runs against on-disk NTFS metadata, so the attacker must get a crafted image mounted locally (attacker-supplied removable media auto-mounted by udisks2/autofs, a loop-mounted image, or a privileged container) and then reach `hdr_find_e()` with a local `stat()`/`open()` on a path inside the malicious directory. No remote peer or network protocol touches this code.\nAC:L - The wrap is deterministic and fully attacker-authored: setting `de_off` to `0xFFFFFFF0` in the crafted index root defeats both `index_hdr_check()` and `hdr_find_e()`'s gate every time, and the resulting `offs[0] = 0xFFF0` entry is reached by the very first binary-search step. No race, no timing window, and the 32-bit kernel is a property of the targeted deployment (i686 distros, ARM32 embedded/industrial, 32-bit Android) rather than a condition the attacker must win.\nPR:L - Mounting `ntfs3` nominally needs `CAP_SYS_ADMIN` (no `FS_USERNS_MOUNT`), but on desktop, kiosk and shared-workstation deployments an ordinary logged-in user gets attacker-supplied media mounted for them by udisks2/polkit, and every step that actually drives the bug \u2014 the path lookup, the file write that triggers `ni_update_parent()` \u2014 is an unprivileged file operation. Scoring the lower-privilege reachable path.\nUI:N - No second user has to act: the automounter mounts the attacker's own device without any victim interaction, and the attacker then performs the triggering `stat()`, `ftruncate()` and writeback themselves. In the loop-mount and privileged-container variants the attacker likewise performs the mount directly.\nS:U - The out-of-bounds reads and the `indx_update_dup()` write all land in kernel slab memory and stay within the kernel's own security authority \u2014 no hypervisor, IOMMU, or container/VM boundary is crossed.\nC:H - `Add2Ptr(hdr, offs[mid_idx])` yields a pointer 65520 bytes past a 1 KB MFT record or 4 KB index buffer, and that OOB memory is then interpreted as a directory entry \u2014 its `ref` field is passed to `ntfs_iget5()`, and `cmp_fnames()` compares its name bytes against the attacker's lookup string, giving a repeatable oracle that lets the attacker read back adjacent kernel heap contents byte by byte.\nI:H - The out-of-bounds entry pointer returned by `hdr_find_e()` flows into `indx_update_dup()`, whose `memcpy(&e_fname->dup, dup, sizeof(*dup))` performs a 0x38-byte heap write ~64 KB out of bounds with content the attacker chooses (`data_size`/`alloc_size` via `ftruncate`, four timestamps via `utimensat`) \u2014 a controlled OOB write suitable for corrupting adjacent slab objects and hijacking control flow.\nA:H - A read 65520 bytes past a small kmalloc allocation reliably faults on unmapped memory or trips KASAN/KFENCE, and the `WARN_ON(!e)` in `indx_insert_into_root()` fires on the same corrupted pointer, so a single `stat()` on the crafted mount oopses or panics the kernel."}]}], "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": "0922d86a7a6032cb1694eab0b44b861bd33ba8d5", "status": "affected", "versionType": "git"}, {"version": "82cae269cfa953032fbb8980a7d554d60fb00b17", "lessThan": "1a14e9718a19d2e88de004a1360bfd7a86ed1395", "status": "affected", "versionType": "git"}, {"version": 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Fix it by using size_add()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/ntfs3: Se corrigen un par de desbordamientos de enteros en sistemas de 32 bits. En sistemas de 32 bits, la adici\u00f3n \"off + sizeof(struct NTFS_DE)\" puede causar un problema de ajuste de enteros. Se soluciona con size_add()."}], "id": "CVE-2025-22081", "lastModified": "2026-07-30T06:22:11.270", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-22081", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T16:15:26.291199Z", "version": "2.0.3"}}]}, "published": "2025-04-16T15:16:02.310", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0538f52410b619737e663167b6a2b2d0bc1a589d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0922d86a7a6032cb1694eab0b44b861bd33ba8d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0dfe700fbd3525f30a36ffbe390a5b9319bd009a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1a14e9718a19d2e88de004a1360bfd7a86ed1395"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/284c9549386e9883855fb82b730303bb2edea9de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4d0f4f42922a832388a0c2fe5204c0a1037ff786"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5ad414f4df2294b28836b5b7b69787659d6aa708"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: fs/ntfs3: Fix a couple integer overflows on 32bit systems", "id": "2360253", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360253"}, "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-190", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nfs/ntfs3: Fix a couple integer overflows on 32bit systems\nOn 32bit systems the \"off + sizeof(struct NTFS_DE)\" addition can\nhave an integer wrapping issue. Fix it by using size_add()."], "name": "CVE-2025-22081", "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": "2025-04-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-22081\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-22081\nhttps://lore.kernel.org/linux-cve-announce/2025041614-CVE-2025-22081-47ac@gregkh/T"], "threat_severity": "Moderate"}

{}