Vulnerability in Kernel package: s390/pci: fix zpci_zdev_put() on reserve
Summary
GSD-2021-1002118: s390/pci: fix zpci_zdev_put() on reserve. Affects Kernel versions >= 2a671f77ee49f3e78997b77fdee139467ff6a598, < 4e5d794a2743f5a1e13ee1066ce37711f2696044. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system, responsible for managing the system's core functionality. It provides essential services and interfaces for hardware devices, memory management, process scheduling, and more. The s390/pci module within the Kernel package specifically handles PCI device management for IBM System z architectures. This vulnerability affects the zpci_zdev_put() function in the s390/pci module, which is used to release a reserved PCI device. The vulnerability allows an attacker to exploit a flaw in the function, potentially leading to unauthorized access, privilege escalation, or denial of service.
Vulnerability Detail
The vulnerability arises from a coding error in the zpci_zdev_put() function of the s390/pci module. When attempting to release a reserved PCI device, the function fails to properly handle certain conditions, allowing an attacker to trigger a use-after-free or double-free vulnerability. This could result in the execution of arbitrary code, system crashes, or other malicious activities. The vulnerability was introduced in version v5.14 of the Linux Kernel and has been fixed in version v5.14.15.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the official fix by updating the Kernel package to the recommended version.
Conclusion
The vulnerability in the Kernel package's s390/pci module could allow an attacker to execute arbitrary code, gain unauthorized access, escalate privileges, or cause denial of service. It is recommended to update the Kernel package to version v5.14.15 or later to address this vulnerability. For further support or assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could allow an attacker to execute arbitrary code, gain unauthorized access, escalate privileges, or cause denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
No, only versions starting from v5.14 up to v5.14.14 are affected. The vulnerability has been fixed in version v5.14.15.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over a network.
There is no evidence of active exploitation of this vulnerability at the time of this report. However, it is crucial to apply the fix promptly to mitigate any potential risks.
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