What is CVE-2025-37996?

CVE-2025-37996 is a high-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 8.8/10. Published 2025-05-29.

How severe is CVE-2025-37996?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Linux

CVE-2025-37996

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.

EPSS: 0.001 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Linux — versions fce886a6020734d6253c2c5a3bc285e385cc5496, 6.14, 0
Linux Linux_kernel — versions 6.15

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-37996?: CVE-2025-37996 is a high-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 8.8/10. Published 2025-05-29.
How severe is CVE-2025-37996?: High severity. CVSS v3 base score is 8.8 out of 10.