CVE-2025-21950

drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl

Description

In the Linux kernel, the following vulnerability has been resolved: drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl In the "pmcmd_ioctl" function, three memory objects allocated by kmalloc are initialized by "hcall_get_cpu_state", which are then copied to user space. The initializer is indeed implemented in "acrn_hypercall2" (arch/x86/include/asm/acrn.h). There is a risk of information leakage due to uninitialized bytes.

N/A

CVSS

Severity:

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120
https://git.kernel.org/stable/c/524f29d78c9bdeb49f31f5b0376a07d2fc5cf563
https://git.kernel.org/stable/c/d7e5031fe3f161c8eb5e84db1540bc4373ed861b
https://git.kernel.org/stable/c/1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083
https://git.kernel.org/stable/c/a4c21b878f0e237f45209a324c903ea7fb05247d
https://git.kernel.org/stable/c/819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb

Frequently Asked Questions

What is the severity of CVE-2025-21950?: CVE-2025-21950 has not yet been assigned a CVSS score.
How to fix CVE-2025-21950?: To fix CVE-2025-21950, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21950 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-21950 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21950?: CVE-2025-21950 affects Linux Linux, Linux Linux.

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