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CVE

CVE-2026-33986

FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write
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CVE

CVE-2026-33986

FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in yuvensurebuffer() in libfreerdp/codec/h264.c, h264->width and h264->height are updated before the reallocation loop. If any winpralignedrecalloc() call fails, the function returns FALSE but width/height are already inflated. This issue has been patched in version 3.24.2.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33986.json, https://github.com/FreeRDP/FreeRDP/commit/f6e43e208958140074ae9bb93cd0c9045a371c77, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h6qw-wxvm-hf97, https://nvd.nist.gov/vuln/detail/CVE-2026-33986

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00048%
EPSS Percentile
0.1527%
Introduced Version
0
Fix Available
3028b706908f81767d9b9c744a90778c28f57d61,3.15.0+dfsg-2.1+deb13u2,3.24.2-r0,2:2.11.7-1.amzn2.0.10,2:3.6.3-1.amzn2023.0.10

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