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CVE-2026-5747

An out-of-bounds write issue in the virtio PCI transport in Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and aarch64 might allow a local guest user with root privileges to crash the Firecracker VMM process or potentially execute arbitrary code on the host via modification of virtio queue configuration registers after device activation. Achieving code execution on the host requires additional preconditions, such as the use of a custom guest kernel or specific snapshot configurations. T
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6d55ead61d310788de3eeb5902ae055906cb7eb15998d72f519698769a8a8ec0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:H/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:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/metrics/0/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-369","description":"CWE-369 Divide by zero","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Firecracker","vendor":"AWS","versions":[{"lessThanOrEqual":"1.14.3","status":"affected","version":"1.13.0","versionType":"custom"},{"status":"affected","version":"1.15.0"},{"status":"unaffected","version":"1.14.4"},{"status":"unaffected","version":"1.15.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:H/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:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-369","description":"CWE-369 Divide by zero","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"tags":["vendor-advisory"],"url":"https://aws.amazon.com/security/security-bulletins/2026-015-aws/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:29e92f0bb5b8519906bfa58545f7fcdabea3356d7b629f0bcf0855ce8a2a4358 · sha256:27e491690aef0ca4… · /containers/cna/references/3

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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