Linux Kernel up to 5.11.15 on ARM footbridge pci_assign_irq privilege escalation

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.11.15 on ARM. The impacted element is the function pci_assign_irq of the component footbridge. The manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2021-46909. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.11.15 on ARM (Operating System). Affected is the function pci_assign_irq of the component footbridge. The impact remains unknown. CVE summarizes:

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.

The weakness was shared 02/27/2024. The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2021-46909 since 02/25/2024. There are known technical details, but no exploit is available.

Upgrading to version 4.14.232, 4.19.189, 5.4.114, 5.10.32, 5.11.16 or 5.12 eliminates this vulnerability. Applying the patch 532747fd5c7a/2643da6aa579/871b569a3e67/1fc087fdb98d/c3efce8cc980/30e3b4f256b4 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.231
• 4.19.188
• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.4.113
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.10.22
• 5.10.23
• 5.10.24
• 5.10.25
• 5.10.26
• 5.10.27
• 5.10.28
• 5.10.29
• 5.10.30
• 5.10.31
• 5.11
• 5.11.0
• 5.11.1
• 5.11.2
• 5.11.3
• 5.11.4
• 5.11.5
• 5.11.6
• 5.11.7
• 5.11.8
• 5.11.9
• 5.11.10
• 5.11.11
• 5.11.12
• 5.11.13
• 5.11.14
• 5.11.15

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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