CVE-2021-47617— PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
Affected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a8cc52270f3d8e8f4faf01ffd6c4a95bbfb55ba4< ff27f7d0333cff89ec85c419f431aca1b38fb16a | affected |
4667358dab9cc07da044d5bc087065545b1000df< 464da38ba827f670deac6500a1de9a4f0f44c41d | affected | ||
8edf5332c39340b9583cf9cba659eb7ec71f75b5< 3b4c966fb156ff3e70b2526d964952ff7c1574d9 | affected | ||
8edf5332c39340b9583cf9cba659eb7ec71f75b5< 1db58c6584a72102e98af2e600ea184ddaf2b8af | affected | ||
8edf5332c39340b9583cf9cba659eb7ec71f75b5< 6d6f1f0dac3e3441ecdb1103d4efb11b9ed24dd5 | affected | ||
8edf5332c39340b9583cf9cba659eb7ec71f75b5< 23584c1ed3e15a6f4bfab8dc5a88d94ab929ee12 | affected | ||
5.7 | affected | ||
< 5.7 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2021-47617
Vulnerability Information
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Vulnerability Title
PCI: pciehp: Fix infinite loop in IRQ handler upon power fault
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: pciehp: Fix infinite loop in IRQ handler upon power fault The Power Fault Detected bit in the Slot Status register differs from all other hotplug events in that it is sticky: It can only be cleared after turning off slot power. Per PCIe r5.0, sec. 6.7.1.8: If a power controller detects a main power fault on the hot-plug slot, it must automatically set its internal main power fault latch [...]. The main power fault latch is cleared when software turns off power to the hot-plug slot. The stickiness used to cause interrupt storms and infinite loops which were fixed in 2009 by commits 5651c48cfafe ("PCI pciehp: fix power fault interrupt storm problem") and 99f0169c17f3 ("PCI: pciehp: enable software notification on empty slots"). Unfortunately in 2020 the infinite loop issue was inadvertently reintroduced by commit 8edf5332c393 ("PCI: pciehp: Fix MSI interrupt race"): The hardirq handler pciehp_isr() clears the PFD bit until pciehp's power_fault_detected flag is set. That happens in the IRQ thread pciehp_ist(), which never learns of the event because the hardirq handler is stuck in an infinite loop. Fix by setting the power_fault_detected flag already in the hardirq handler.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 PCI:pciehp 模块电源故障时 IRQ 处理程序会发生无限循环。
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
II. Public POCs for CVE-2021-47617
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2024-06-20 · 67 CVEs total
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| CVE-2022-48768 | tracing/histogram: Fix a potential memory leak for kstrdup() | |
| CVE-2022-48769 | efi: runtime: avoid EFIv2 runtime services on Apple x86 machines | |
| CVE-2022-48757 | net: fix information leakage in /proc/net/ptype | |
| CVE-2022-48756 | drm/msm/dsi: invalid parameter check in msm_dsi_phy_enable | |
| CVE-2022-48755 | powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06 | |
| CVE-2022-48754 | phylib: fix potential use-after-free | |
| CVE-2022-48753 | block: fix memory leak in disk_register_independent_access_ranges | |
| CVE-2022-48752 | powerpc/perf: Fix power_pmu_disable to call clear_pmi_irq_pending only if PMI is pending | |
| CVE-2022-48758 | scsi: bnx2fc: Flush destroy_work queue before calling bnx2fc_interface_put() | |
| CVE-2022-48750 | hwmon: (nct6775) Fix crash in clear_caseopen | |
| CVE-2022-48748 | net: bridge: vlan: fix memory leak in __allowed_ingress | |
| CVE-2022-48749 | drm/msm/dpu: invalid parameter check in dpu_setup_dspp_pcc | |
| CVE-2022-48747 | block: Fix wrong offset in bio_truncate() | |
| CVE-2022-48745 | net/mlx5: Use del_timer_sync in fw reset flow of halting poll | |
| CVE-2022-48746 | net/mlx5e: Fix handling of wrong devices during bond netevent | |
| CVE-2022-48744 | net/mlx5e: Avoid field-overflowing memcpy() | |
| CVE-2022-48743 | net: amd-xgbe: Fix skb data length underflow | |
| CVE-2022-48742 | rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink() |
Showing top 20 of 67 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
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liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
V. Comments for CVE-2021-47617
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