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CVE-2026-66401

FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 extension-unit parser that fails to validate descriptor length before accessing the GUID field. A local attacker with a malicious USB video camera can trigger a heap read beyond allocated bounds during camera stream setup, causing denial of service.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:99ec4688dc98b201a9fe3c95403e4ce9fcda47cb72232086522090c9bf4b0ac1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":2.4,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"PHYSICAL","availabilityImpact":"LOW","baseScore":2.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"FreeRDP","vendor":"FreeRDP","versions":[{"lessThan":"3.29.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.29.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":2.4,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"PHYSICAL","availabilityImpact":"LOW","baseScore":2.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/FreeRDP/FreeRDP/commit/5044d5390035c6fd9a36ad885192d97d21e8a92d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/references/1
{"name":"GitHub Security Advisory (GHSA-8jj2-67pg-j6mg)","tags":["vendor-advisory"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/adp/0/references/0
{"name":"VulnCheck Advisory: FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f94b1efc373542f1e970deb31d3291029e4b5640557e7b5f7ce081c933a02746 · sha256:120674401337d345… · /containers/cna/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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