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Vulnerabilities

Vulnerability · CVE-2026-121958

FreeRDP through 3.32.1 Heap Out-of-Bounds Write via RDPGFX HashTable_GetKeys

Published Nov 4, 2026 · catalog updated Nov 5, 2026 · FreeRDP FreeRDP

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-121958. EPSS is 0.30%. Act only if a listed version of FreeRDP FreeRDP is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Advisory link
Affected products
Debian:12 freerdp2 · Debian:13 freerdp3 · Debian:14 freerdp3 · vendor FreeRDP FreeRDP

FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE PDUs, and then sending ENDFRAME or RESETGRAPHICS.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 freerdp22.10.0+dfsg1-1, 2.10.0+dfsg1-1.1, 2.11.2+dfsg1-1
  • Debian:13 freerdp33.15.0+dfsg-2.1, 3.15.0+dfsg-2.1+deb13u1, 3.15.0+dfsg-2.1+deb13u2
  • Debian:14 freerdp30 → 3.32.2+dfsg-1
  • vendor FreeRDP FreeRDPversion unspecified

How to fix CVE-2026-121958

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-121958. EPSS is 0.30%. Act only if a listed version of FreeRDP FreeRDP is installed.

Which versions are affected?

Compare what you have installed with 2.10.0+dfsg1-1, 2.10.0+dfsg1-1.1, 2.11.2+dfsg1-1, 3.15.0+dfsg-2.1, 3.15.0+dfsg-2.1+deb13u1, 3.15.0+dfsg-2.1+deb13u2, 0 → 3.32.2+dfsg-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow. EPSS 0.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Detected

  2. Nov 5, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    freerdp3 fixed in 3.32.2+dfsg-1

  3. Nov 5, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    freerdp3 fixed in 3.32.2+dfsg-1

  4. Nov 5, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    The description or metadata changed.

Sources

  • CVE.orgVulnerability recordCVE-2026-121958

    FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-121958

    30-day exploitation probability 0.30%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-121958
    osv.dev

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgNov 5, 2026
  • OpenSSF OSV / OSV ScannerNov 5, 2026