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CVE-2026-93821— PCI: altera: Protect root bus removal with rescan lock

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： PCI: Altera：使用重扫描锁保护根总线移除操作 在停止和移除根总线期间，需持有 锁，以避免与通过 sysfs 触发的并发重扫描或热插拔操作发生竞态条件。此类竞态条件可能导致 Use-After-Free（使用后释放）问题或系统崩溃。 [bhelgaas：提交日志]

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< cf9d84d1b6a7c3f3780c043df220a7e9e38137eb affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< fc462f1bdeaea9789928cbfdf5e069ee559c7642 affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< 442b7f2a093b4a75f8963aaa7cbb2b8df35a6ac3 affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< 4b69c63cc247fc0f499fbd11076fee9c2a6e6fd7 affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< c0cd65906e5f7e293ef2568c9524cc0a918333c3 affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< 7cbb8f2750d91e64caff89e164ac8280bb80bedc affected
ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22< a8759c8ac48c0419f5899e95a6ffc611b07c965b affected
5.3 affected
… +8 more rows
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I. Basic Information for CVE-2026-93821

Vulnerability Information
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Vulnerability Title
PCI: altera: Protect root bus removal with rescan lock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: altera: Protect root bus removal with rescan lock Hold the pci_rescan_remove_lock lock while stopping and removing a root bus to avoid racing with concurrent rescan or hotplug operations triggered via sysfs. Such races may lead to use-after-free issues or system crashes. [bhelgaas: 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 ec15c4d0d5d2e431169fbdf6c6bcf0c8ff71ef22 ~ cf9d84d1b6a7c3f3780c043df220a7e9e38137eb -
Linux Linux 5.3 -

II. Public POCs for CVE-2026-93821

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III. Intelligence Information for CVE-2026-93821

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Patches & Fixes for CVE-2026-93821 (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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