CVE-2025-39784— PCI: Fix link speed calculation on retrain failure
Affected Version Matrix 6
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I. Basic Information for CVE-2025-39784
Vulnerability Information
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Vulnerability Title
PCI: Fix link speed calculation on retrain failure
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: Fix link speed calculation on retrain failure When pcie_failed_link_retrain() fails to retrain, it tries to revert to the previous link speed. However it calculates that speed from the Link Control 2 register without masking out non-speed bits first. PCIE_LNKCTL2_TLS2SPEED() converts such incorrect values to PCI_SPEED_UNKNOWN (0xff), which in turn causes a WARN splat in pcie_set_target_speed(): pci 0000:00:01.1: [1022:14ed] type 01 class 0x060400 PCIe Root Port pci 0000:00:01.1: broken device, retraining non-functional downstream link at 2.5GT/s pci 0000:00:01.1: retraining failed WARNING: CPU: 1 PID: 1 at drivers/pci/pcie/bwctrl.c:168 pcie_set_target_speed RDX: 0000000000000001 RSI: 00000000000000ff RDI: ffff9acd82efa000 pcie_failed_link_retrain pci_device_add pci_scan_single_device Mask out the non-speed bits in PCIE_LNKCTL2_TLS2SPEED() and PCIE_LNKCAP_SLS2SPEED() so they don't incorrectly return PCI_SPEED_UNKNOWN. [bhelgaas: commit log, add details from https://lore.kernel.org/r/1c92ef6bcb314ee6977839b46b393282e4f52e74.1750684771.git.lukas@wunner.de]
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，该漏洞源于未正确屏蔽非速度位，可能导致链接速度计算错误。
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-2025-39784
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Same Patch Batch · Linux · 2025-09-11 · 54 CVEs total
| CVE-2025-39773 | net: bridge: fix soft lockup in br_multicast_query_expired() | |
| CVE-2025-39791 | dm: dm-crypt: Do not partially accept write BIOs with zoned targets | |
| CVE-2025-39785 | drm/hisilicon/hibmc: fix irq_request()'s irq name variable is local | |
| CVE-2025-39788 | scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE | |
| CVE-2025-39787 | soc: qcom: mdt_loader: Ensure we don't read past the ELF header | |
| CVE-2025-39786 | iio: adc: ad7173: fix channels index for syscalib_mode | |
| CVE-2025-39789 | crypto: x86/aegis - Add missing error checks | |
| CVE-2025-39776 | mm/debug_vm_pgtable: clear page table entries at destroy_args() | |
| CVE-2025-39775 | mm/mremap: fix WARN with uffd that has remap events disabled | |
| CVE-2025-39774 | iio: adc: rzg2l_adc: Set driver data before enabling runtime PM | |
| CVE-2025-39777 | crypto: acomp - Fix CFI failure due to type punning | |
| CVE-2025-39772 | drm/hisilicon/hibmc: fix the hibmc loaded failed bug | |
| CVE-2025-39771 | regulator: pca9450: Use devm_register_sys_off_handler | |
| CVE-2025-39770 | net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM | |
| CVE-2025-39769 | bnxt_en: Fix lockdep warning during rmmod | |
| CVE-2025-39768 | net/mlx5: HWS, fix complex rules rehash error flow | |
| CVE-2025-39766 | net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit | |
| CVE-2025-39767 | LoongArch: Optimize module load time by optimizing PLT/GOT counting | |
| CVE-2025-39765 | ALSA: timer: fix ida_free call while not allocated | |
| CVE-2025-39764 | netfilter: ctnetlink: remove refcounting in expectation dumpers |
Showing top 20 of 54 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: 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
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
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