5.5

CVE-2025-37996

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.14 < 6.14.7
Linux ≫ Linux Kernel Version 6.15 Update rc1
Linux ≫ Linux Kernel Version 6.15 Update rc2
Linux ≫ Linux Kernel Version 6.15 Update rc3
Linux ≫ Linux Kernel Version 6.15 Update rc4
Linux ≫ Linux Kernel Version 6.15 Update rc5
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.044
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

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