CVE-2026-64555KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops()
- 8.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops() kvm_hyp_handle_mops() resets the single-step state machine as part of rewinding state for a MOPS exception by modifying vcpu_cpsr() and writing the result directly into hardware. In the case of nested virtualization, vcpu_cpsr() is a synthetic value such that the rest of KVM can deal with vEL2 cleanly. That means the value requires translation before being written into hardware, which is unfortunately missing from the MOPS handler. Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state altogether, which will be resynchronized on the next 'full' exit back to KVM.
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 21 days later
· 21 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 2de451a329cf662beeba71f63c7f83ee24ca6642 – < 10a568010e827108d149779908850afaec898846
- affected 2de451a329cf662beeba71f63c7f83ee24ca6642 – < 884b44256041ec6b2dcbe8e6a67384d26145cba1
- affected 2de451a329cf662beeba71f63c7f83ee24ca6642 – < dd3b237eb7780d65eae296d3d3a70012b6e7a02f
- affected 2de451a329cf662beeba71f63c7f83ee24ca6642 – < ff1022c3de46753eb7eba2f6efd990569e66ff95
- affected 6.7
- unaffected < 6.7
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/10a568010e827108d149779908850afaec898846 (opens in a new tab)
- https://git.kernel.org/stable/c/884b44256041ec6b2dcbe8e6a67384d26145cba1 (opens in a new tab)
- https://git.kernel.org/stable/c/dd3b237eb7780d65eae296d3d3a70012b6e7a02f (opens in a new tab)
- https://git.kernel.org/stable/c/ff1022c3de46753eb7eba2f6efd990569e66ff95 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49606 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64555)Record last updated .