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CVE-2026-25959

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_cliprdr_provide_data_` passes freed `pDstData` to `XChangeProperty` because the cliprdr channel thread calls `xf_cliprdr_server_format_data_response` which converts and uses the clipboard data without holding any lock, while the X11 event thread concurrently calls `xf_cliprdr_clear_cached_data` → `HashTable_Clear` which frees the same data via `xf_cached_data_free`, triggering a heap use after free. Ver
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:741972c96eeb49866f6309e211f1d837a4448b2a9f9a8e3ff2a6b243af4b4aec
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.23.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.5,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"CWE-416: Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/problemTypes/0/descriptions/0

Source references

10 source assertions
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1229-L1243","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1229-L1243"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/2
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1337-L1344","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1337-L1344"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/3
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L200-L208","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L200-L208"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/4
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2295","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2295"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/5
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2323-L2334","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2323-L2334"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/6
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2363","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L2363"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/7
{"name":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L933","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L933"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/8
{"name":"https://github.com/FreeRDP/FreeRDP/commit/d3e8b3b9365be96a4f11dda149d71b3287227d0a","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/commit/d3e8b3b9365be96a4f11dda149d71b3287227d0a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78xg-v4p2-4w3c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78xg-v4p2-4w3c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78xg-v4p2-4w3c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0e08e33fc10e432eddfd9573be13bfe1f91a1eb651c16427cb56363a2a2cf547 · sha256:dfcbe34ba7d89b26… · /containers/adp/0/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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