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CVE-2026-97441— ata: ahci: fail probe if BAR too small for claimed ports

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： ata: ahci：如果 BAR 大小不足以容纳所声称的端口数，则探测失败 当 AHCI 控制器在 BIOS 中被禁用时，其 HOST_CAP 寄存器可能包含无效值，例如 0xFFFFFFFF。 由于 CAP.NP（端口数量）是一个基于零的五位寄存器字段，值 0x1f 表示 32 个端口。如果 CAP.NP 所声称的端口数超过可映射的 BAR 区域所能容纳的物理端口数，则访问超出 BAR 边界范围的端口寄存器会导致内核恐慌（kernel panic）。 在 ahci_i

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 533a08ea11217100cec7a0ed903cb9b9c892d6f1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c717b20100ef8cd06b5237af70ea2cb692e058ce affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ff0ab535f8febbd32afa5832f8d2d9b06a8d5060 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6d29b91164424256a759ddabc8f2de1ae09bd3f1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< df262c828b616450eb351349e91c63447551bd01 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f2e291043c37a896d7f9797e25a356dceb030177 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c4086c6e1af757e1ff26fa2d2926b3ec0195de79 affected
2.6.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-97441

Vulnerability Information
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Vulnerability Title
ata: ahci: fail probe if BAR too small for claimed ports
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ata: ahci: fail probe if BAR too small for claimed ports When an AHCI controller is disabled in BIOS, its HOST_CAP register may contain a bogus value, e.g. 0xFFFFFFFF. Since CAP.NP (Number of Ports) is a zeroes based 5-bit register field, a value of 0x1f means 32 ports. If CAP.NP claims more ports than can physically fit within the mapped BAR region, accessing port registers beyond the BAR boundary causes a kernel panic. Add validation in ahci_init_one() to check that the BAR size is sufficient for the number of ports claimed in CAP.NP. The check calculates the required MMIO size as: required_size = 0x100 (global registers) + max_ports * 0x80 If required_size exceeds the actual BAR size, the probe fails with -ENODEV, preventing the panic and providing a clear error message. [cassel: commit log]
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 533a08ea11217100cec7a0ed903cb9b9c892d6f1 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-97441

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III. Intelligence Information for CVE-2026-97441

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Patches & Fixes for CVE-2026-97441 (7)

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-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
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-2026-97455 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-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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