Use-After-Free in FreeRDP (CVE-2026-24678)
Summary
Vulnerability in FreeRDP (CVE-2026-24678). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 3.22.0 or later.
Original description
The description as published by the source.
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, A capture thread sends sample responses using a freed channel callback after a device channel close, leading to a use after free in ecam_channel_write. This vulnerability is fixed in 3.22.0.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-24678 has been found in FreeRDP.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade FreeRDP to 3.22.0 or later.
If unsure, ask your IT team or search "FreeRDP CVE-2026-24678" on the vendor's site.
CVE-2026-24678 (FreeRDP) — CWE-416 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 3.22.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Use-after-free (CWE-416) exists in FreeRDP.
Check the vendor advisory for the affected versions of FreeRDP.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 3.22.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'FreeRDP' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'FreeRDP' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
FreeRDPを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade FreeRDP to 3.22.0ステージング環境で 3.22.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-24678 freerdp2
References
- advisory github.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory access.redhat.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- report bugzilla.redhat.com
- web security.access.redhat.com