What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

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]

Affected products

• Linux kernel: 5.3 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/442b7f2a093b4a75f8963aaa7cbb2b8df35a6ac3
• https://git.kernel.org/stable/c/4b69c63cc247fc0f499fbd11076fee9c2a6e6fd7
• https://git.kernel.org/stable/c/7cbb8f2750d91e64caff89e164ac8280bb80bedc
• https://git.kernel.org/stable/c/a8759c8ac48c0419f5899e95a6ffc611b07c965b
• https://git.kernel.org/stable/c/c0cd65906e5f7e293ef2568c9524cc0a918333c3
• https://git.kernel.org/stable/c/cf9d84d1b6a7c3f3780c043df220a7e9e38137eb
• https://git.kernel.org/stable/c/fc462f1bdeaea9789928cbfdf5e069ee559c7642

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