CVE-2025-37996
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-37996
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-37996.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-37996
- Downstream
- Published
- 2025-05-29T13:15:54Z
- Modified
- 2025-10-18T01:30:21.293411Z
- Summary
- KVM: arm64: Fix uninitialized memcache pointer in user_mem_abort()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Fix uninitialized memcache pointer in usermemabort()
Commit fce886a60207 ("KVM: arm64: Plumb the pKVM MMU in KVM") made the initialization of the local memcache variable in usermemabort() conditional, leaving a codepath where it is used uninitialized via kvmpgtablestage2_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.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfce886a6020734d6253c2c5a3bc285e385cc5496Fixeda26d50f8a4a5049e956984797b5d0dedea4bbb18
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfce886a6020734d6253c2c5a3bc285e385cc5496Fixed157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c
Affected versions
v6.*
v6.13
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.14
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.14.1
v6.14.2
v6.14.3
v6.14.4
v6.14.5
v6.14.6
v6.15-rc1
v6.15-rc2
v6.15-rc3
v6.15-rc4
Database specific
vanir_signatures
[
{
"signature_type": "Line",
"id": "CVE-2025-37996-203f51ad",
"target": {
"file": "arch/arm64/kvm/mmu.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c",
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
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]
},
"deprecated": false
},
{
"signature_type": "Function",
"id": "CVE-2025-37996-335c813d",
"target": {
"function": "user_mem_abort",
"file": "arch/arm64/kvm/mmu.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a26d50f8a4a5049e956984797b5d0dedea4bbb18",
"signature_version": "v1",
"digest": {
"function_hash": "123498371865048947309567115381901045016",
"length": 4059.0
},
"deprecated": false
},
{
"signature_type": "Function",
"id": "CVE-2025-37996-3a37f4c2",
"target": {
"function": "user_mem_abort",
"file": "arch/arm64/kvm/mmu.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@157dbc4a321f5bb6f8b6c724d12ba720a90f1a7c",
"signature_version": "v1",
"digest": {
"function_hash": "123498371865048947309567115381901045016",
"length": 4059.0
},
"deprecated": false
},
{
"signature_type": "Line",
"id": "CVE-2025-37996-b1be05b8",
"target": {
"file": "arch/arm64/kvm/mmu.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a26d50f8a4a5049e956984797b5d0dedea4bbb18",
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
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]
},
"deprecated": false
}
]