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CVE-2026-43133

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) nSVM module. When a nested virtual machine (L2 guest) executes VMSAVE/VMLOAD instructions, and these are not intercepted by the first-level hypervisor (L1), KVM incorrectly uses `vmcb02` instead of `vmcb01` for managing guest state. This incorrect Virtual Machine Control Block (VMCB) handling could lead to unexpected behavior or state corruption within the virtualized environment.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ac8198c5b898e0f343777d91d1c3874cbe01d795e18b4849523fce4953826012
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 12 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/9

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/7

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/0

{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"10063e1251c1485034a018236080792ad083dcc5","status":"affected","version":"cc3ed80ae69f454c3d904af9f65394a540099723","versionType":"git"},{"lessThan":"c3b7015000988ba35ecd5648f4b2283960f00543","status":"affected","version":"cc3ed80ae69f454c3d904af9f65394a540099723","versionType":"git"},{"lessThan":"3880e331b0b31d0d5d3702b124f6c93539cd478a","status":"affected","version":"cc3ed80ae69f454c3d904af…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"libkrun","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/6

{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThan…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unknown","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/8
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.9,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/metrics/1/cvssV3_1

{"metric":{"baseScore":7.9,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

12 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/9
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/7
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"kernel","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/0
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"10063e1251c1485034a018236080792ad083dcc5","status":"affected","version":"cc3ed80ae69f454c3d904af9f65394a540099723","versionType":"git"},{"lessThan":"c3b7015000988ba35ecd5648f4b2283960f00543","status":"affected","version":"cc3ed80ae69f454c3d904af9f65394a540099723","versionType":"git"},{"lessThan":"3880e331b0b31d0d5d3702b124f6c93539cd478a","status":"affected","version":"cc3ed80ae69f454c3d904af…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"unaffected","packageName":"libkrun","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/6
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThan…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unaffected","packageName":"kernel","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unknown","packageName":"kernel-rt","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/affected/8

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.9,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/metrics/1/cvssV3_1
{"metric":{"baseScore":7.9,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-628","description":"Function Call with Incorrectly Specified Arguments","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

10 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-43133"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/references/0
{"name":"RHBZ#2467065","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467065"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/references/1
{"url":"https://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/cna/references/3
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43133.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cdb6042c5968cc88906e80e77938ce2beab3586b86b6be3dcc8fb14712699ff2 · sha256:d72a464dfa6263c9… · /containers/adp/0/references/2

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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