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CVE-2026-63941

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor ZCR_EL2 can be updated by a VHE guest hypervisor either using ZCR_EL2 (which traps) or ZCR_EL1 (which does not trap). KVM handles both in different way: - on ZCR_EL2 trap, ZCR_EL2.LEN is immediately capped at the VM's own VL limit. This has the potential to break existing SW that relies on the full LEN field to be stateful. - on ZCR_EL1 access, we do absolu
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1db69e651584567e6719f372c8670ae764b820ac3492c4b86b3edc39077ec42f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_host.h","arch/arm64/kvm/hyp/include/hyp/switch.h","arch/arm64/kvm/nested.c","arch/arm64/kvm/sys_regs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_host.h","arch/arm64/kvm/hyp/include/hyp/switch.h","arch/arm64/kvm/nested.c","arch/arm64/kvm/sys_regs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"742a9b5ccd8c46caf983ca90c94f855466968e34","status":"affected","version":"b3d29a8230998b36afecf494b199211d26052785","versionType":"git"},{"lessThan":"83726330748981372bde86ed5411d7b306612991","status":"affected","version":"b3d29a8230998b36afecf494b199211d26052785","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_host.h","arch/arm64/kvm/hyp/include/hyp/switch.h","arch/arm64/kvm/nested.c","arch/arm64/kvm/sys_regs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_host.h","arch/arm64/kvm/hyp/include/hyp/switch.h","arch/arm64/kvm/nested.c","arch/arm64/kvm/sys_regs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"742a9b5ccd8c46caf983ca90c94f855466968e34","status":"affected","version":"b3d29a8230998b36afecf494b199211d26052785","versionType":"git"},{"lessThan":"83726330748981372bde86ed5411d7b306612991","status":"affected","version":"b3d29a8230998b36afecf494b199211d26052785","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/742a9b5ccd8c46caf983ca90c94f855466968e34"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/83726330748981372bde86ed5411d7b306612991"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fe63a555a3424321e97e1aa5737632aab37faa40cb90b5669c8f5f504a364a1d · sha256:60ef8046907cdc17… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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