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CVE-2021-46909— ARM: footbridge: fix PCI interrupt mapping

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于每当探测 PCI 驱动程序时，PCI 代码都会调用 IRQ 映射函数。如果这些被标记为 __init，如果在内核初始化后加载或绑定 PCI 驱动程序，则会导致漏洞。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 30fdfb929e82450bbf3d0e0aba56efbc29b52b52< 532747fd5c7aaa17ee5cf79f3e947c31eb0e35cf affected
30fdfb929e82450bbf3d0e0aba56efbc29b52b52< 2643da6aa57920d9159a1a579fb04f89a2b0d29a affected
30fdfb929e82450bbf3d0e0aba56efbc29b52b52< 871b569a3e67f570df9f5ba195444dc7c621293b affected
30fdfb929e82450bbf3d0e0aba56efbc29b52b52< 1fc087fdb98d556b416c82ed6e3964a30885f47a affected
30fdfb929e82450bbf3d0e0aba56efbc29b52b52< c3efce8cc9807339633ee30e39882f4c8626ee1d affected
30fdfb929e82450bbf3d0e0aba56efbc29b52b52< 30e3b4f256b4e366a61658c294f6a21b8626dda7 affected
4.13 affected
< 4.13 unaffected
… +6 more rows
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I. Basic Information for CVE-2021-46909

Vulnerability Information
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Vulnerability Title
ARM: footbridge: fix PCI interrupt mapping
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ARM: footbridge: fix PCI interrupt mapping Since commit 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()"), the PCI code will call the IRQ mapping function whenever a PCI driver is probed. If these are marked as __init, this causes an oops if a PCI driver is loaded or bound after the kernel has initialised.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于每当探测 PCI 驱动程序时，PCI 代码都会调用 IRQ 映射函数。如果这些被标记为 __init，如果在内核初始化后加载或绑定 PCI 驱动程序，则会导致漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 30fdfb929e82450bbf3d0e0aba56efbc29b52b52 ~ 532747fd5c7aaa17ee5cf79f3e947c31eb0e35cf -
Linux Linux 4.13 -

II. Public POCs for CVE-2021-46909

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III. Intelligence Information for CVE-2021-46909

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Other References for CVE-2021-46909 (6)

Same Patch Batch · Linux · 2024-02-27 · 67 CVEs total

CVE-2021-46911 9.8 CRITICAL ch_ktls: Fix kernel panic
CVE-2021-46955 8.2 HIGH openvswitch: fix stack OOB read while fragmenting IPv4 packets
CVE-2021-46929 7.8 HIGH sctp: use call_rcu to free endpoint
CVE-2021-46922 7.8 HIGH KEYS: trusted: Fix TPM reservation for seal/unseal
CVE-2021-46921 7.8 HIGH locking/qrwlock: Fix ordering in queued_write_lock_slowpath()
CVE-2021-46958 7.8 HIGH btrfs: fix race between transaction aborts and fsyncs leading to use-after-free
CVE-2021-46925 7.8 HIGH net/smc: fix kernel panic caused by race of smc_sock
CVE-2021-46963 7.8 HIGH scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()
CVE-2021-46967 7.8 HIGH vhost-vdpa: fix vm_flags for virtqueue doorbell mapping
CVE-2021-46969 7.8 HIGH bus: mhi: core: Fix invalid error returning in mhi_queue
CVE-2021-46973 7.8 HIGH net: qrtr: Avoid potential use after free in MHI send
CVE-2021-46936 7.8 HIGH net: fix use-after-free in tw_timer_handler
CVE-2021-46913 7.8 HIGH netfilter: nftables: clone set element expression template
CVE-2021-46933 7.8 HIGH usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear.
CVE-2021-46960 7.5 HIGH cifs: Return correct error code from smb2_get_enc_key
CVE-2021-46948 7.5 HIGH sfc: farch: fix TX queue lookup in TX event handling
CVE-2021-46912 7.3 HIGH net: Make tcp_allowed_congestion_control readonly in non-init netns
CVE-2021-46974 7.1 HIGH bpf: Fix masking negation logic upon negative dst register
CVE-2021-46908 7.1 HIGH bpf: Use correct permission flag for mixed signed bounds arithmetic
CVE-2021-46910 7.0 HIGH ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-46909

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