CVE-2025-37996

KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort()

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort() Commit fce886a60207 ("KVM: arm64: Plumb the pKVM MMU in KVM") made the initialization of the local memcache variable in user_mem_abort() conditional, leaving a codepath where it is used uninitialized via kvm_pgtable_stage2_map(). This can fail on any path that requires a stage-2 allocation without transition via a permission fault or dirty logging. Fix this by making sure that memcache is always valid.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/a26d50f8a4a5049e956984797b5d0dedea4bbb18
https://git.kernel.org/stable/c/157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c

Frequently Asked Questions

What is the severity of CVE-2025-37996?: CVE-2025-37996 has not yet been assigned a CVSS score.
How to fix CVE-2025-37996?: To fix CVE-2025-37996, 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-2025-37996 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-37996 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-2025-37996?: CVE-2025-37996 affects Linux Linux, Linux Linux.

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