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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (4.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-37996: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Linux — versions fce886a6020734d6253c2c5a3bc285e385cc5496, 6.14, 0
  • Linux Kernel — versions 6.15

Weakness classification (CWE)

References

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.