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TI-2026-46126 Aliases CVE-2026-64562GHSA-mc77-r35g-cpmm

KVM: nVMX: Hide shadow VMCS right after VMCLEAR

Priority LOW 39CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR. The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00162 5th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.265, 5.15.216, 6.1.183 +5Red Hat: 8 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.9 and later5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2Patch availableCNA
  • Linux VendorLinux Affected 4.9 and later Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2

Red Hat 8 advisories

  • RHSA-2026:68131 Released 2026-09-16 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.214.1.el8_6, kernel-4.18.0-372.214.1.el8_6, kernel-abi-stablelists-4.18.0-372.214.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.214.1.el8_6, kernel-4.18.0-372.214.1.el8_6, kernel-abi-stablelists-4.18.0-372.214.1.el8_6 +14
  • RHSA-2026:59091 Released 2026-08-24 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.201.1.el8_4, kernel-4.18.0-305.201.1.el8_4, kernel-abi-stablelists-4.18.0-305.201.1.el8_4 +14
  • RHSA-2026:51603 Released 2026-08-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.186.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.186.1.el9_2, kernel-64k-devel-5.14.0-284.186.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.186.1.el9_2, kernel-5.14.0-284.186.1.el9_2, kernel-64k-5.14.0-284.186.1.el9_2 +29
Show 5 more Red Hat advisories
  • RHSA-2026:51604 Released 2026-08-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-core-5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-5.14.0-284.186.1.rt14.471.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-core-5.14.0-284.186.1.rt14.471.el9_2, kernel-rt-debug-5.14.0-284.186.1.rt14.471.el9_2 +11
  • RHSA-2026:49031 Released 2026-07-31 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.131.1.el9_6, libperf-5.14.0-570.131.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.131.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.131.1.el9_6, kernel-64k-devel-5.14.0-570.131.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.131.1.el9_6, kernel-64k-5.14.0-570.131.1.el9_6, kernel-64k-core-5.14.0-570.131.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.131.1.el9_6, kernel-rt-64k-5.14.0-570.131.1.el9_6, kernel-rt-64k-core-5.14.0-570.131.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.131.1.el9_6, kernel-rt-core-5.14.0-570.131.1.el9_6, kernel-rt-debug-5.14.0-570.131.1.el9_6 +11
  • RHSA-2026:49030 Released 2026-07-31 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.94.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.94.1.el10_0, kernel-64k-devel-6.12.0-55.94.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.94.1.el10_0, kernel-64k-6.12.0-55.94.1.el10_0, kernel-64k-core-6.12.0-55.94.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.94.1.el10_0, libperf-6.12.0-55.94.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.94.1.el10_0, kernel-rt-64k-6.12.0-55.94.1.el10_0, kernel-rt-64k-core-6.12.0-55.94.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.94.1.el10_0, kernel-rt-core-6.12.0-55.94.1.el10_0, kernel-rt-debug-6.12.0-55.94.1.el10_0 +11
  • RHSA-2026:48386 Released 2026-07-31 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.141.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.141.1.el9_4, kernel-64k-devel-5.14.0-427.141.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.141.1.el9_4, kernel-5.14.0-427.141.1.el9_4, kernel-64k-5.14.0-427.141.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.141.1.el9_4, kernel-rt-core-5.14.0-427.141.1.el9_4, kernel-rt-debug-5.14.0-427.141.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.141.1.el9_4, kernel-rt-core-5.14.0-427.141.1.el9_4, kernel-rt-debug-5.14.0-427.141.1.el9_4 +11
  • RHSA-2026:47869 Released 2026-07-29 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.156.1.el8_8, kernel-4.18.0-477.156.1.el8_8, kernel-abi-stablelists-4.18.0-477.156.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.156.1.el8_8, kernel-4.18.0-477.156.1.el8_8, kernel-abi-stablelists-4.18.0-477.156.1.el8_8 +14

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:49031
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:51603
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:48386
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:49030
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:49031
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:68131
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:47869
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:51603
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:48386
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:49030
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:49031
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:59091
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:68131
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:47869
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:49030
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:51604
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:48386
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:49030
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:49031
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:51604
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:48386
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:49030
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:49031
Not affected: 7 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-64562
  2. 2026-10-03 Alias added: GHSA-mc77-r35g-cpmm
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-20 Weakness changed · CISA ADP
  5. 2026-10-30 Affected versions changed · Red Hat
  6. 2026-10-30 Affected versions changed · Red Hat
  7. 2026-11-04 Fix available: RHSA-2026:51603 · Red Hat
  8. 2026-11-04 Fix available: RHSA-2026:51604 · Red Hat
  9. 2026-11-04 Fix available: RHSA-2026:49031 · Red Hat
  10. 2026-11-04 Fix available: RHSA-2026:59091 · Red Hat
  11. 2026-11-04 Fix available: RHSA-2026:48386 · Red Hat
  12. 2026-11-04 Fix available: RHSA-2026:47869 · Red Hat
  13. 2026-11-04 Fix available: RHSA-2026:49030 · Red Hat
  14. 2026-11-04 Fix available: RHSA-2026:68131 · Red Hat
  15. 2026-11-04 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4) +21 · Red Hat

References

Other 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences