CVE catalog

CVE-2026-33977

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid

[CVE catalog]

Severity: Medium · CVSS 6.9
Published: Mar 25, 2026, 11:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.27% · Oct 27, 2026

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	freerdp2	bookworm	`2.11.7+dfsg1-6~deb12u1`	vulnerable
Cpe	freerdp2	Not reported	Not reported	vulnerable
Cpe	freerdp	Not reported	`3.24.2`	fixed
Cpe	freerdp3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	freerdp3-dev	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	freerdp3-shadow-x11	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	freerdp3-wayland	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	freerdp3-x11	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libfreerdp-client3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libfreerdp-server3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libfreerdp-shadow-subsystem3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libfreerdp-shadow3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libfreerdp3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libwinpr-tools3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libwinpr3-3	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	libwinpr3-dev	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Cpe	winpr3-utils	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Ubuntu	freerdp	16.04	`1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1`	vulnerable
Ubuntu	freerdp	16.04	`1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2`	vulnerable
Ubuntu	freerdp	16.04	`1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3`	vulnerable
Ubuntu	freerdp	16.04	`1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4`	vulnerable
Ubuntu	freerdp2	pro	`2.10.0+dfsg1-1.1ubuntu1`	vulnerable
Ubuntu	freerdp2	pro	`2.11.2+dfsg1-1`	vulnerable
Ubuntu	freerdp2	pro	`2.11.2+dfsg1-1build1`	vulnerable
Ubuntu	freerdp2	pro	`2.11.2+dfsg1-1build3`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1build1`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1build2`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm1`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm2`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm3`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm4`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm5`	vulnerable
Ubuntu	freerdp2	pro	`2.11.5+dfsg1-1ubuntu0.1~esm6`	vulnerable
Ubuntu	freerdp	18.04	`1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1`	vulnerable
Ubuntu	freerdp	18.04	`1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1`	vulnerable
Ubuntu	freerdp	18.04	`1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2`	vulnerable
Ubuntu	freerdp2	22.04	`2.3.0+dfsg1-2build1`	vulnerable
Ubuntu	freerdp2	22.04	`2.3.0+dfsg1-2ubuntu1`	vulnerable
Ubuntu	freerdp2	22.04	`2.3.0+dfsg1-2ubuntu2`	vulnerable
Ubuntu	freerdp2	22.04	`2.4.1+dfsg1-1`	vulnerable
Ubuntu	freerdp2	22.04	`2.4.1+dfsg1-1ubuntu1`	vulnerable
Ubuntu	freerdp2	22.04	`2.4.1+dfsg1-1ubuntu2`	vulnerable
Ubuntu	freerdp2	22.04	`2.5.0+dfsg1-1`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.0+dfsg1-1`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-1`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu1`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.1`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.2`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.3`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.4`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.5`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.6`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.7`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.8`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.9`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.10`	vulnerable
Ubuntu	freerdp2	22.04	`2.6.1+dfsg1-3ubuntu2.11`	vulnerable
Ubuntu	freerdp3	24.04	`3.4.0+dfsg1-0ubuntu2`	vulnerable
Ubuntu	freerdp3	24.04	`3.4.0+dfsg1-0ubuntu3`	vulnerable
Ubuntu	freerdp3	24.04	`3.4.0+dfsg1-0ubuntu4`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.0+dfsg1-0ubuntu1`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1.1`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1.2`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1.4`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1.5`	vulnerable
Ubuntu	freerdp3	24.04	`3.5.1+dfsg1-0ubuntu1.6`	vulnerable
Ubuntu	freerdp3	24.04	`3.30.0+dfsg-0ubuntu0.24.04.1`	fixed
Ubuntu	freerdp3	25.10	`3.14.0+dfsg-1ubuntu1`	vulnerable
Ubuntu	freerdp3	25.10	`3.15.0+dfsg-2.1`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-1ubuntu1`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-2`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-2ubuntu0.1`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-2ubuntu0.3`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-2ubuntu0.4`	vulnerable
Ubuntu	freerdp3	25.10	`3.16.0+dfsg-2ubuntu0.5`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	freerdp2	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	freerdp	cpe	Not reported	`3.24.2`	Not reported	Not reported	Not reported
Cpe	freerdp3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	freerdp3-dev	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	freerdp3-shadow-x11	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	freerdp3-wayland	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	freerdp3-x11	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libfreerdp-client3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libfreerdp-server3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libfreerdp-shadow-subsystem3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libfreerdp-shadow3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libfreerdp3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libwinpr-tools3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libwinpr3-3	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	libwinpr3-dev	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Cpe	winpr3-utils	cpe	Not reported	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Ubuntu	freerdp3	deb	24.04	`3.30.0+dfsg-0ubuntu0.24.04.1`	Not reported	UBUNTU-CVE-2026-33977	Not reported

Notes

[bookworm] freerdp2: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[freerdp2-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[freerdp2-shadow-x11]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[freerdp2-wayland]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[freerdp2-x11]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libfreerdp2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libfreerdp-client2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libfreerdp-server2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libfreerdp-shadow2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libfreerdp-shadow-subsystem2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libuwac0-0]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libuwac0-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libwinpr2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libwinpr2-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[libwinpr-tools2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
[winpr-utils]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm; nvd · freerdp2 · debian · 12

[Debian 13 (Trixie)]

[freerdp3-dev]Fixed
Source package: [freerdp3]
Details (4)
- 3.15.0+dfsg-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.15.0+dfsg-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
[freerdp3-proxy]Fixed
Source package: [freerdp3]
Details (4)
- 3.15.0+dfsg-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.15.0+dfsg-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
[freerdp3-proxy-modules]Fixed
Source package: [freerdp3]
Details (4)
- 3.15.0+dfsg-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.15.0+dfsg-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
[freerdp3-sdl]Fixed
Source package: [freerdp3]
Details (4)
- 3.15.0+dfsg-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.15.0+dfsg-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
[freerdp3-shadow-x11]Fixed
Source package: [freerdp3]
Details (4)
- 3.15.0+dfsg-2.1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.15.0+dfsg-2.1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13
- 3.30.0+dfsg-1~bpo13+1 · all · trixie-backports
  Fixed · Fixed: 3.15.0+dfsg-2.1+deb13u2
  nvd · freerdp3 · debian · 13

Next results

Observed: Oct 23, 2026, 10:37:13 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]