CVE-2026-31883

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Source
https://cve.org/CVERecord?id=CVE-2026-31883
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31883.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-31883
Aliases
  • GHSA-85x9-4xxp-xhm5
Downstream
Related
Published
2026-03-13T17:35:17.411Z
Modified
2026-04-06T17:59:23.703062740Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
FreeRDP has a `size_t` underflow in ADPCM decoder leads to heap-buffer-overflow write
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a sizet 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 sizet variable without checking for underflow. When nBlockAlign (received from the server) is set such that size % blocksize == 0 triggers the header parsing at a point where size is smaller than the header (4 or 8 bytes), the subtraction wraps size to ~SIZEMAX. The while (size > 0) loop then continues for an astronomical number of iterations. This vulnerability is fixed in 3.24.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31883.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-122",
        "CWE-191"
    ]
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b00402d3258402c868224b6ffed04182cbed78d9

Affected versions

1.*
1.0-beta1
1.0-beta2
1.0-beta3
1.0-beta4
1.0-beta5
1.0.0
1.0.1
1.0.2
1.0.2-rc1
1.0.2-rc2
1.1.0-beta+2013071101
1.1.0-beta1
1.1.0-beta1+android2
1.1.0-beta1+android3
1.1.0-beta1+android4
1.1.0-beta1+android5
1.1.0-beta1+ios1
1.1.0-beta1+ios2
1.1.0-beta1+ios3
1.1.0-beta1+ios4
1.2.0-beta1+android7
1.2.0-beta1+android9
2.*
2.0.0
2.0.0-beta1+android10
2.0.0-beta1+android11
2.0.0-rc0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
2.1.0
2.1.1
2.1.2
2.10.0
2.11.0
2.11.1
2.11.2
2.11.3
2.11.4
2.11.5
2.11.6
2.11.7
2.11.8
2.2.0
2.3.0
2.3.1
2.3.2
2.4.1
2.5.0
2.6.0
2.6.1
2.7.0
2.8.0
2.8.1
2.9.0
3.*
3.0.0
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-rc0
3.1.0
3.10.0
3.10.1
3.10.2
3.10.3
3.11.0
3.11.1
3.12.0
3.13.0
3.14.0
3.14.1
3.15.0
3.16.0
3.17.0
3.17.1
3.17.2
3.18.0
3.19.0
3.19.1
3.2.0
3.20.0
3.20.1
3.20.2
3.21.0
3.22.0
3.23.0
3.3.0
3.4.0
3.5.0
3.5.1
3.6.0
3.6.1
3.6.2
3.6.3
3.7.0
3.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31883.json"