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CVE-2026-22851

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6f80320e7cc3541eb2a65454e5e777b4d5cd3ab4d0dfaa2a258332597f3b3113
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-416","description":"CWE-416: Use After Free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.20.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-416","description":"CWE-416: Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /containers/cna/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g87-6pvc-wh99","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g87-6pvc-wh99"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:58b8147bc413787f2d3fd56b83c98d30f99d3caf28b77beb5f6d197b1008cf2e · sha256:4acdb9ca3658f1b1… · /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.

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