vulnerability
Ubuntu: (Multiple Advisories) (CVE-2025-37996): Linux kernel vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | May 29, 2025 | Jun 26, 2025 | Nov 19, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
May 29, 2025
Added
Jun 26, 2025
Modified
Nov 19, 2025
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.
Solutions
ubuntu-upgrade-linux-image-6-14-0-1010-azureubuntu-upgrade-linux-image-6-14-0-1010-oemubuntu-upgrade-linux-image-6-14-0-1010-realtimeubuntu-upgrade-linux-image-6-14-0-1011-awsubuntu-upgrade-linux-image-6-14-0-1011-aws-64kubuntu-upgrade-linux-image-6-14-0-1011-oracleubuntu-upgrade-linux-image-6-14-0-1011-oracle-64kubuntu-upgrade-linux-image-6-14-0-1012-raspiubuntu-upgrade-linux-image-6-14-0-1014-gcpubuntu-upgrade-linux-image-6-14-0-1014-gcp-64kubuntu-upgrade-linux-image-6-14-0-28-genericubuntu-upgrade-linux-image-6-14-0-28-generic-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-6-14ubuntu-upgrade-linux-image-aws-64kubuntu-upgrade-linux-image-aws-64k-6-14ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-6-14ubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-6-14ubuntu-upgrade-linux-image-gcp-64kubuntu-upgrade-linux-image-gcp-64k-6-14ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-6-14ubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-6-14ubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oem-24-04cubuntu-upgrade-linux-image-oem-6-14ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-6-14ubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-oracle-64k-6-14ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-6-14ubuntu-upgrade-linux-image-realtimeubuntu-upgrade-linux-image-realtime-6-14ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-6-14ubuntu-upgrade-linux-image-virtual-hwe-24-04
References
- CVE-2025-37996
- https://attackerkb.com/topics/CVE-2025-37996
- CWE-908
- UBUNTU-USN-7699-1
- UBUNTU-USN-7699-2
- UBUNTU-USN-7721-1
- URL-https://git.kernel.org/linus/157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c
- URL-https://git.kernel.org/stable/c/157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c
- URL-https://git.kernel.org/stable/c/a26d50f8a4a5049e956984797b5d0dedea4bbb18
- URL-https://ubuntu.com/security/notices/USN-7699-1
- URL-https://www.cve.org/CVERecord?id=CVE-2025-37996
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