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CVE-2026-31883

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a size_t underflow in the IMA-ADPCM and MS-ADPCM audio decoders leads to heap-buffer-overflow write via the RDPSND audio channel. In libfreerdp/codec/dsp.c, the IMA-ADPCM and MS-ADPCM decoders subtract block header sizes from a size_t variable without checking for underflow. When nBlockAlign (received from the server) is set such that size % block_size == 0 triggers the header parsing at a point where size is small
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cc44a59258af593fc3e231457b4c99fd34d15f2dc810fff254c33049ab42d18a
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-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"FreeRDP","vendor":"FreeRDP","versions":[{"status":"affected","version":"< 3.24.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-191","description":"CWE-191: Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/FreeRDP/FreeRDP/commit/16df2300e1e3f5a51f68fb1626429e58b531b7c8","tags":["x_refsource_MISC"],"url":"https://github.com/FreeRDP/FreeRDP/commit/16df2300e1e3f5a51f68fb1626429e58b531b7c8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/references/1
{"name":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-85x9-4xxp-xhm5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-85x9-4xxp-xhm5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-85x9-4xxp-xhm5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f79588b80696bf9ff7819b67b0abd2477f0f3103165b6fec565a90e045cf19f9 · sha256:8f992e9a6517d896… · /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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