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Fencer Vulns
high 8.8

CVE-2025-37849 json

KVM: arm64: Tear down vGIC on failed vCPU creation

published 2025-05-09 18 mo ago modified 2026-08-05 3 mo ago also EUVD-2025-14143

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Tear down vGIC on failed vCPU creation

If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor, we propagate the error back to the ioctl but leave the vGIC vCPU data initialised. Note only does this leak the corresponding memory when the vCPU is destroyed but it can also lead to use-after-free if the redistributor device handling tries to walk into the vCPU.

Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the vGIC vCPU structures are destroyed on error.

Patch / fix

  • Linux Linux 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3, 6.15
  • linux Debian 12 6.1.135-1
  • linux Debian 14, Debian 13 6.12.25-1

debian advisories DEBIAN-CVE-2025-37849

  • linux Ubuntu 22.04 LTS 5.15.0-174.184
  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1104.111
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1104.113
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1100.106
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48

ubuntu advisories UBUNTU-CVE-2025-37849

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-611.5.1.el9_7
  • rv RHEL 9 5.14.0-611.5.1.el9_7
  • perf RHEL 9 5.14.0-611.5.1.el9_7
  • rtla RHEL 9 5.14.0-611.5.1.el9_7
  • libperf RHEL 9 5.14.0-611.5.1.el9_7
  • kernel-rt RHEL 9 5.14.0-611.5.1.el9_7
  • kernel-64k RHEL 9 5.14.0-611.5.1.el9_7
  • kernel-core RHEL 9 5.14.0-611.5.1.el9_7

red hat advisories RHSA-2026:6193RHSA-2026:1495RHSA-2026:1494RHSA-2026:1443RHSA-2026:1441RHSA-2026:0917

  • kernel-rt Linux Micro 6.2 6.12.0-160000.6.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.6.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1.160000.2.4
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-obs-qa SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1

suse advisories SUSE-SU-2025:21074-1SUSE-SU-2025:21139-1SUSE-SU-2026:20560-1SUSE-SU-2025:21179-1SUSE-SU-2025:02923-1SUSE-SU-2025:02333-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.6.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall openSUSE Leap 16.0 6.12.0-160000.6.1

opensuse advisories openSUSE-SU-2025:20081-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-37849 updated cvss 7.0

kernel: KVM: arm64: Tear down vGIC on failed vCPU creation

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.107.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.107.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.107.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.107.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.107.1.el9_4
    fixed: vendor fix RHSA-2026:0917
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.79.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.79.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.79.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.79.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.79.1.el9_6
    fixed: vendor fix RHSA-2026:0804
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.5.1.el9_7, perf 5.14.0-611.5.1.el9_7, rtla 5.14.0-611.5.1.el9_7, python3-perf 5.14.0-611.5.1.el9_7, kernel-devel-matched 5.14.0-611.5.1.el9_7, kernel-64k-devel-matched 5.14.0-611.5.1.el9_7, +7 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.8.1.el10_1, perf 6.12.0-124.8.1.el10_1, rtla 6.12.0-124.8.1.el10_1, python3-perf 6.12.0-124.8.1.el10_1, kernel-devel-matched 6.12.0-124.8.1.el10_1, kernel-64k-devel-matched 6.12.0-124.8.1.el10_1, +7 more
    fixed: vendor fix RHSA-2025:20095
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.163.1.el9_0, kernel-devel-matched 5.14.0-70.163.1.el9_0, kernel-debug-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.163.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.163.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:1494
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.154.1.el9_2, rtla 5.14.0-284.154.1.el9_2, kernel-devel-matched 5.14.0-284.154.1.el9_2, kernel-64k-devel-matched 5.14.0-284.154.1.el9_2, kernel-debug-devel-matched 5.14.0-284.154.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.154.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:1441
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.65.1.el10_0, perf 6.12.0-55.65.1.el10_0, rtla 6.12.0-55.65.1.el10_0, python3-perf 6.12.0-55.65.1.el10_0, kernel-devel-matched 6.12.0-55.65.1.el10_0, kernel-64k-devel-matched 6.12.0-55.65.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:6193
show 27 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.107.1.el9_4, perf 5.14.0-427.107.1.el9_4, rtla 5.14.0-427.107.1.el9_4, kernel-devel-matched 5.14.0-427.107.1.el9_4, kernel-64k-devel-matched 5.14.0-427.107.1.el9_4, kernel-debug-devel-matched 5.14.0-427.107.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:0917
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.79.1.el9_6, perf 5.14.0-570.79.1.el9_6, rtla 5.14.0-570.79.1.el9_6, python3-perf 5.14.0-570.79.1.el9_6, kernel-devel-matched 5.14.0-570.79.1.el9_6, kernel-64k-devel-matched 5.14.0-570.79.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:0804
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.5.1.el9_7, kernel-64k 5.14.0-611.5.1.el9_7, kernel-core 5.14.0-611.5.1.el9_7, kernel-tools 5.14.0-611.5.1.el9_7, kernel-modules 5.14.0-611.5.1.el9_7, kernel-64k-core 5.14.0-611.5.1.el9_7, +27 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.8.1.el10_1, kernel-64k 6.12.0-124.8.1.el10_1, kernel-core 6.12.0-124.8.1.el10_1, kernel-tools 6.12.0-124.8.1.el10_1, kernel-modules 6.12.0-124.8.1.el10_1, kernel-64k-core 6.12.0-124.8.1.el10_1, +28 more
    fixed: vendor fix RHSA-2025:20095
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.163.1.el9_0, bpftool 5.14.0-70.163.1.el9_0, kernel-core 5.14.0-70.163.1.el9_0, kernel-tools 5.14.0-70.163.1.el9_0, python3-perf 5.14.0-70.163.1.el9_0, kernel-modules 5.14.0-70.163.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:1494
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.154.1.el9_2, kernel 5.14.0-284.154.1.el9_2, kernel-64k 5.14.0-284.154.1.el9_2, kernel-core 5.14.0-284.154.1.el9_2, kernel-tools 5.14.0-284.154.1.el9_2, python3-perf 5.14.0-284.154.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:1441
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.65.1.el10_0, kernel-64k 6.12.0-55.65.1.el10_0, kernel-core 6.12.0-55.65.1.el10_0, kernel-tools 6.12.0-55.65.1.el10_0, kernel-modules 6.12.0-55.65.1.el10_0, kernel-64k-core 6.12.0-55.65.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.107.1.el9_4, kernel 5.14.0-427.107.1.el9_4, kernel-64k 5.14.0-427.107.1.el9_4, kernel-core 5.14.0-427.107.1.el9_4, kernel-tools 5.14.0-427.107.1.el9_4, python3-perf 5.14.0-427.107.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:0917
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.79.1.el9_6, kernel-64k 5.14.0-570.79.1.el9_6, kernel-core 5.14.0-570.79.1.el9_6, kernel-tools 5.14.0-570.79.1.el9_6, kernel-modules 5.14.0-570.79.1.el9_6, kernel-64k-core 5.14.0-570.79.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:0804
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.5.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.5.1.el9_7
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.8.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.8.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.8.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.8.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.8.1.el10_1
    fixed: vendor fix RHSA-2025:20095
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.65.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.65.1.el10_0
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, +4 more
    fixed: vendor fix RHSA-2026:1495
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.5.1.el9_7, kernel-rt-64k 5.14.0-611.5.1.el9_7, kernel-rt-core 5.14.0-611.5.1.el9_7, kernel-rt-modules 5.14.0-611.5.1.el9_7, kernel-rt-64k-core 5.14.0-611.5.1.el9_7, kernel-rt-debug-core 5.14.0-611.5.1.el9_7, +14 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.8.1.el10_1, kernel-rt-64k 6.12.0-124.8.1.el10_1, kernel-rt-core 6.12.0-124.8.1.el10_1, kernel-rt-modules 6.12.0-124.8.1.el10_1, kernel-rt-64k-core 6.12.0-124.8.1.el10_1, kernel-rt-debug-core 6.12.0-124.8.1.el10_1, +14 more
    fixed: vendor fix RHSA-2025:20095
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules-extra 5.14.0-70.163.1.rt21.235.el9_0, +2 more
    fixed: vendor fix RHSA-2026:1495
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-core 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-modules 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-core 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-modules-core 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-modules 5.14.0-284.154.1.rt14.439.el9_2, +4 more
    fixed: vendor fix RHSA-2026:1443
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.65.1.el10_0, kernel-rt-64k 6.12.0-55.65.1.el10_0, kernel-rt-core 6.12.0-55.65.1.el10_0, kernel-rt-modules 6.12.0-55.65.1.el10_0, kernel-rt-64k-core 6.12.0-55.65.1.el10_0, kernel-rt-debug-core 6.12.0-55.65.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.107.1.el9_4, kernel-rt-core 5.14.0-427.107.1.el9_4, kernel-rt-modules 5.14.0-427.107.1.el9_4, kernel-rt-debug-core 5.14.0-427.107.1.el9_4, kernel-rt-modules-core 5.14.0-427.107.1.el9_4, kernel-rt-debug-modules 5.14.0-427.107.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:0917
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.79.1.el9_6, kernel-rt-64k 5.14.0-570.79.1.el9_6, kernel-rt-core 5.14.0-570.79.1.el9_6, kernel-rt-modules 5.14.0-570.79.1.el9_6, kernel-rt-64k-core 5.14.0-570.79.1.el9_6, kernel-rt-debug-core 5.14.0-570.79.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:0804
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.5.1.el9_7, kernel-rt-core 5.14.0-611.5.1.el9_7, kernel-rt-modules 5.14.0-611.5.1.el9_7, kernel-rt-debug-core 5.14.0-611.5.1.el9_7, kernel-rt-modules-core 5.14.0-611.5.1.el9_7, kernel-rt-debug-modules 5.14.0-611.5.1.el9_7, +4 more
    fixed: vendor fix RHSA-2025:20518
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.8.1.el10_1, kernel-rt-core 6.12.0-124.8.1.el10_1, kernel-rt-modules 6.12.0-124.8.1.el10_1, kernel-rt-debug-core 6.12.0-124.8.1.el10_1, kernel-rt-modules-core 6.12.0-124.8.1.el10_1, kernel-rt-debug-modules 6.12.0-124.8.1.el10_1, +4 more
    fixed: vendor fix RHSA-2025:20095
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-kvm 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-core 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-modules 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-kvm 5.14.0-284.154.1.rt14.439.el9_2, kernel-rt-debug-core 5.14.0-284.154.1.rt14.439.el9_2, +6 more
    fixed: vendor fix RHSA-2026:1443
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.65.1.el10_0, kernel-rt-kvm 6.12.0-55.65.1.el10_0, kernel-rt-core 6.12.0-55.65.1.el10_0, kernel-rt-modules 6.12.0-55.65.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.65.1.el10_0, kernel-rt-debug-core 6.12.0-55.65.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:6193
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.107.1.el9_4, kernel-rt-kvm 5.14.0-427.107.1.el9_4, kernel-rt-core 5.14.0-427.107.1.el9_4, kernel-rt-modules 5.14.0-427.107.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.107.1.el9_4, kernel-rt-debug-core 5.14.0-427.107.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:0917
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.79.1.el9_6, kernel-rt-kvm 5.14.0-570.79.1.el9_6, kernel-rt-core 5.14.0-570.79.1.el9_6, kernel-rt-modules 5.14.0-570.79.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.79.1.el9_6, kernel-rt-debug-core 5.14.0-570.79.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:0804
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.