7.8

CVE-2025-37849

KVM: arm64: Tear down vGIC on failed vCPU creation

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Tear down vGIC on failed vCPU creation

If kvm_arch_vcpu_create() fails to share the vCPU page with the
hypervisor, we propagate the error back to the ioctl but leave the
vGIC vCPU data initialised. Note only does this leak the corresponding
memory when the vCPU is destroyed but it can also lead to use-after-free
if the redistributor device handling tries to walk into the vCPU.

Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the
vGIC vCPU structures are destroyed on error.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 6.1.135
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.88
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.24
Linux ≫ Linux Kernel Version >= 6.13 < 6.13.12
Linux ≫ Linux Kernel Version >= 6.14 < 6.14.3
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.155
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e
Patch
https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5
Patch
https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73
Patch
https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52
Patch
https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299
Patch
https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672
Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
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