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CVE-2026-92522— ACPI: processor: validate MADT IOAPIC entry bounds

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： ACPI: processor: 验证 MADT IOAPIC 条目的边界 IOAPIC 热插拔查找逻辑会直接解析 MADT 和 _MAT 记录。 此前，MADT 遍历逻辑在仅定位到通用表头后，便使用该子表声明的长度来推进游标。同样地，_MAT 路径也将一个通用表头传给了 IOAPIC 辅助函数。 修复措施： 验证当前记录是否具有完整的通用表头； 验证其声明的长度是否包含在可用的记录范围内； 在读取 IOAPIC 类型记录的字段之前，验证该记录是否包含完整的固定 IOAPI

CVSS 7.3 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1195.002 · Compromise Software Supply Chain

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ecf5636dcd59cd5508641f995cc4c2bafedbb995< 5601bd81bc290a724ed47797d22c16cba4d7ed9f affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< ff82e3374e9103d046b2a82f4315d9a422ff097d affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 2a5520065e76000f8c979d3d7b3d861ccaaecf1e affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 8e67b58c04990817ac2dbf8ae03353be6a358cd4 affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 74d84320f8e37955eb286a7777843d554e6e75b2 affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 4d8ecaa332c163f2b44aa5027bf061950b71b5f3 affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 355bee5f11acb116cd256588631b4028ca562646 affected
ecf5636dcd59cd5508641f995cc4c2bafedbb995< 2c50ffdc73f3a70d745d249f509fc290754121e6 affected
… +10 more rows
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I. Basic Information for CVE-2026-92522

Vulnerability Information
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Vulnerability Title
ACPI: processor: validate MADT IOAPIC entry bounds
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: validate MADT IOAPIC entry bounds The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper. Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 ecf5636dcd59cd5508641f995cc4c2bafedbb995 ~ 5601bd81bc290a724ed47797d22c16cba4d7ed9f -
Linux Linux 4.0 -

II. Public POCs for CVE-2026-92522

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III. Intelligence Information for CVE-2026-92522

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Patches & Fixes for CVE-2026-92522 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

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-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
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-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
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

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-92522

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