CVE-2026-90199— fs/ntfs3: reject out-of-range evcn in mi_enum_attr()
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，以下漏洞已得到修复： fs/ntfs3：在 mi_enum_attr() 中拒绝超出范围的 evcn 在 中，针对非驻留属性（non-resident attributes）的起始/结束 VCN 校验逻辑为： 当 的值为 时，表达式 会发生整数回绕（wrap around），结果变为 0，导致任意 都能通过该检查。对于接近但不等于 的 值，右侧表达式仍是一个无意义的、接近回绕的上界，因此一个磁盘上格式错误的属性（ 且 接近 ）可能未被 拒绝而通过验证。 VCN（Virtual Cluster
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1140 · Deobfuscate/Decode Files or InformationAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 013ff63b649475f0ee134e2c8d0c8e65284ede50< 0441e34ce098c19185a7b52c5b8b89a8a5b26888 |
affected |
013ff63b649475f0ee134e2c8d0c8e65284ede50< 7ab69cef49ebdfee288287d62641b24ab1445ecc |
affected | ||
013ff63b649475f0ee134e2c8d0c8e65284ede50< ce9a619c432b9a4044fee115c5483fbed946c131 |
affected | ||
013ff63b649475f0ee134e2c8d0c8e65284ede50< 2b9a0e57bfd365e2096706b19ae34dce3b4a884b |
affected | ||
013ff63b649475f0ee134e2c8d0c8e65284ede50< 20fd9f64c0050658f2031e6bd5d552c6f0c8f7e3 |
affected | ||
a7accf181a4709a6e380360372150cc4a1b6b89a |
affected | ||
3dfd727873c3e8da74a2e3907120ff052c5f0bcc |
affected | ||
1d7dd485108d4f633b543c9c14071cc325b68ae5 |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-90199
Vulnerability Information
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Vulnerability Title
fs/ntfs3: reject out-of-range evcn in mi_enum_attr()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: reject out-of-range evcn in mi_enum_attr()
In mi_enum_attr(), the start/end VCN validation for non-resident
attributes is:
if (svcn > evcn + 1) goto out;
When evcn is U64_MAX the "evcn + 1" expression wraps to 0 and any svcn
passes the check. For evcn values close to U64_MAX (but not equal to it)
the right-hand side is still a meaningless near-wrap upper bound, so a
malformed on-disk attribute with svcn == 0 and evcn near U64_MAX can pass
mi_enum_attr() unrejected.
VCN (virtual cluster number) is a cluster index, so any valid evcn is
bounded by the volume's total cluster count, which ntfs3 holds in
sbi->used.bitmap.nbits (set up in ntfs_init_from_boot() before any caller
of mi_enum_attr() runs). Reject evcn values that fall outside this range.
However, an empty non-resident attribute (no allocated clusters) is
legitimately encoded with svcn == 0 and evcn == -1 (U64_MAX), e.g. via
attr->nres.evcn = cpu_to_le64((u64)vcn - 1) with vcn == 0. That sentinel
must keep passing, so exclude evcn == U64_MAX from the range check. The
existing "svcn > evcn + 1" test still tolerates the sentinel ("0 > 0" is
false) and continues to require svcn == 0 for it, while the range check
rejects every other out-of-range evcn and thereby also defuses the
"evcn + 1" wraparound.
svcn does not need its own bound: once evcn < nbits, "svcn > evcn + 1"
implies svcn <= nbits.
[almaz.alexandrovich@paragon-software.com: fixed evcn check]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-90199
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-90199 (5)
Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total
| CVE-2026-90104 | 9.8 CRITICAL | NFSv4.1: zero referring call lists before decoding |
| CVE-2026-90151 | 9.8 CRITICAL | NFSv4: remove callback IDR entry on client allocation failure |
| CVE-2026-90173 | 9.8 CRITICAL | smb: smbdirect: free completion queues with ib_free_cq() |
| CVE-2026-92489 | 9.8 CRITICAL | xfrm: Fix skb double-free in xfrm_dev_direct_output() |
| CVE-2026-90235 | 9.8 CRITICAL | sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE |
| CVE-2026-90110 | 9.4 CRITICAL | inetpeer: randomize RB-tree node comparison using SipHash |
| CVE-2026-90414 | 9.1 CRITICAL | IB/isert: reject PDUs declaring more data than was received |
| CVE-2026-90230 | 9.1 CRITICAL | nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate() |
| CVE-2026-90413 | 9.1 CRITICAL | IB/isert: reject login PDUs declaring more data than was received |
| CVE-2026-90329 | 8.8 HIGH | HID: synchronize input before cleaning up a failed probe |
| CVE-2026-90381 | 8.8 HIGH | wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx() |
| CVE-2026-90425 | 8.8 HIGH | iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID |
| CVE-2026-90380 | 8.8 HIGH | wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete |
| CVE-2026-90286 | 8.8 HIGH | drm/amdgpu/gfx6: Use PFP on the compute queues too |
| CVE-2026-90379 | 8.8 HIGH | wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash |
| CVE-2026-90256 | 8.8 HIGH | Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind |
| CVE-2026-90255 | 8.8 HIGH | Bluetooth: hci_conn: fix the SCO setup context lifetime |
| CVE-2026-90371 | 8.8 HIGH | wifi: mt76: fix RXDMAD_C buffer recycling race |
| CVE-2026-93189 | 8.8 HIGH | HID: core: quiesce input in hid_hw_stop() to prevent use-after-free |
| CVE-2026-93042 | 8.8 HIGH | dmaengine: dw-edma: Terminate all descriptors without callbacks |
Showing top 20 of 600 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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V. Comments for CVE-2026-90199
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