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CVE-2026-97437— ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： ntfs3：修复 ntfs_dir_emit() 和 hdr_find_e() 中的越界读取问题 中的边界检查将 （字符计数）与 （字节计数）进行比较，但未考虑 UTF-16LE 编码的每字符 2 字节大小，也未考虑 头的大小： 该计算等价于： 正确的检查必须考虑 头（名称之前有 66 字节）以及 UTF-16LE 字符的大小（每个字符 2 字节）： 该计算等价于： 正确的计算逻辑 已存在于 中，并被 、 和 使用，但在 路径中未被采用。 通过构造具有索引条目的 NTFS

CVSS 7.1 · High EPSS 0.14% · P3

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 4342306f0f0d5ff4315a204d315c1b51b914fca5< d1f98938e437732c0ecdfc8ee451e12a072f6d07 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 0505f1e7bb5b981b6ed62d98b26ddce76142865d affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< ed6da1abeec50db9060d714f03743fe0b63e4fe4 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 6a8149a20e46086c756c2a9202e377c0b649a0c3 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< aa1bdbb39f49c5bc9779316891c40005517842a5 affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-97437

Vulnerability Information
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Vulnerability Title
ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e() The bounds check in ntfs_dir_emit() compares fname->name_len (a character count) against e->size (a byte count) without accounting for the 2-byte-per-character UTF-16LE encoding or the ATTR_FILE_NAME header size: if (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size)) This computes: name_len + 16 > e_size The correct check must account for the ATTR_FILE_NAME header (66 bytes before the name) and the UTF-16LE character size (2 bytes each): sizeof(NTFS_DE) + offsetof(ATTR_FILE_NAME, name) + name_len * sizeof(short) > e_size Which computes: 16 + 66 + name_len * 2 > e_size The correct calculation already exists as fname_full_size() in ntfs.h and is used in cmp_fnames(), namei.c, and fslog.c, but was not used in the readdir path. A crafted NTFS image with an index entry containing a small e->size but large fname->name_len bypasses the current check, causing ntfs_utf16_to_nls() to read past the entry boundary. Additionally, add a key_size validation in hdr_find_e() to ensure the declared key_size does not exceed the available entry data, preventing comparison functions from reading past entry boundaries on the lookup path.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4342306f0f0d5ff4315a204d315c1b51b914fca5 ~ d1f98938e437732c0ecdfc8ee451e12a072f6d07 -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-97437

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III. Intelligence Information for CVE-2026-97437

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Patches & Fixes for CVE-2026-97437 (6)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask
CVE-2026-93282 8.1 HIGH ksmbd: fix maximum allowed access checks

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-97437

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