CVE Explorer
CVE-2026-5818
Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW during a hitless update.
This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://github.com/chipsalliance/caliptra-sw","defaultStatus":"unaffected","modules":["ActivateFirmwareCmd::activate_fw"],"packageName":"Core Runtime Firmware","product":"Core Runtime Firmware","vendor":"Caliptra","versions":[{"lessThanOrEqual":"2.0.1","status":"affected","version":"2.0.0","versionType":"semver"},{"status":"affected","version":"2.1.0","versionType":"semver"},{"status":"unaffected","version":"2.0.2","versionType":"semver"},{"status":"unaffected","version":"2.1.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:8ef8a7232a0fb93afad854dade1f97129823da83b0d1f1436eed01045f176695 · sha256:7f67dbf66f593bae… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"ADJACENT","baseScore":7.2,"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:A/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:8ef8a7232a0fb93afad854dade1f97129823da83b0d1f1436eed01045f176695 · sha256:7f67dbf66f593bae… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-253","description":"CWE-253 Incorrect check of function return value","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:8ef8a7232a0fb93afad854dade1f97129823da83b0d1f1436eed01045f176695 · sha256:7f67dbf66f593bae… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-456r-gcjr-6rxq"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:8ef8a7232a0fb93afad854dade1f97129823da83b0d1f1436eed01045f176695 · sha256:7f67dbf66f593bae… · /containers/cna/references/0
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.