Type confusion in Entr'ouvert Lasso
Priority MEDIUM 45CWE-843Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 20 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-843 and the CVSS impact.
Summary
A type confusion vulnerability exists in the lasso_node_impl_init_from_xml functionality of Entr'ouvert Lasso 2.5.1 and 2.8.2. A specially crafted SAML response can lead to an arbitrary code execution. An attacker can send a malformed SAML response to trigger this vulnerability.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01093 65th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Red Hat: 11 advisoriesRed Hat: 20 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Entr'ouvert | Lasso | 2.5.1; 2.8.2 | — | No fix listed | CNA |
- Lasso VendorEntr'ouvert Affected 2.5.1; 2.8.2 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:entrouvert:lasso:2.5.1:*:*:*:*:*:*:* | 2.5.1 | Vulnerable | Entr'ouvert |
| cpe:2.3:a:entrouvert:lasso:2.8.2:*:*:*:*:*:*:* | 2.8.2 | Vulnerable | Entr'ouvert |
- cpe:2.3:a:entrouvert:lasso:2.5.1:*:*:*:*:*:*:* Versions 2.5.1 Vulnerable ·Entr'ouvert
- cpe:2.3:a:entrouvert:lasso:2.8.2:*:*:*:*:*:*:* Versions 2.8.2 Vulnerable ·Entr'ouvert
Remediation
Red Hat 11 advisories
- RHSA-2025:21628 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream (v. 8) lasso-2.6.0-14.el8_10, python3-lasso-2.6.0-14.el8_10
- Red Hat Enterprise Linux CRB (v. 8) lasso-devel-2.6.0-14.el8_10
- RHSA-2025:21462 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream (v. 9) lasso-2.7.0-11.el9_7.3, python3-lasso-2.7.0-11.el9_7.3
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) lasso-devel-2.7.0-11.el9_7.3
- RHSA-2025:21452 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat CodeReady Linux Builder EUS (v.9.6) lasso-devel-2.7.0-11.el9_6.2
- Red Hat Enterprise Linux AppStream EUS (v.9.6) lasso-2.7.0-11.el9_6.2, python3-lasso-2.7.0-11.el9_6.2
Show 8 more Red Hat advisories
- RHSA-2025:21403 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat CodeReady Linux Builder EUS (v.9.4) lasso-devel-2.7.0-11.el9_4.1
- Red Hat Enterprise Linux AppStream EUS (v.9.4) lasso-2.7.0-11.el9_4.1, python3-lasso-2.7.0-11.el9_4.1
- RHSA-2025:21406 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) lasso-2.7.0-11.el9_2.1, python3-lasso-2.7.0-11.el9_2.1
- RHSA-2025:21404 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux Server (v. 7 ELS) lasso-2.5.1-8.el7_9.1, lasso-2.5.1-8.el7_9.1.ppc, lasso-python-2.5.1-8.el7_9.1
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) lasso-devel-2.5.1-8.el7_9.1, lasso-devel-2.5.1-8.el7_9.1.ppc
- RHSA-2025:21400 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream E4S (v.8.8) lasso-2.6.0-13.el8_8.1, python3-lasso-2.6.0-13.el8_8.1
- Red Hat Enterprise Linux AppStream TUS (v.8.8) lasso-2.6.0-13.el8_8.1, python3-lasso-2.6.0-13.el8_8.1
- RHSA-2025:21405 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) lasso-2.7.0-9.el9_0.1
- RHSA-2025:21401 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) lasso-2.6.0-12.el8_6.1
- Red Hat Enterprise Linux AppStream E4S (v.8.6) lasso-2.6.0-12.el8_6.1
- Red Hat Enterprise Linux AppStream TUS (v.8.6) lasso-2.6.0-12.el8_6.1
- RHSA-2025:21402 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) lasso-2.6.0-8.el8_4.1
- Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) lasso-2.6.0-8.el8_4.1
- RHSA-2025:21399 Released 2025-11-17 · Red Hat rating Criticallasso security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) lasso-2.6.0-8.el8_2.1
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Fixed | RHSA-2025:21403 |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2025:21452 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2025:21628 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2025:21462 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2025:21399 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2025:21402 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2025:21401 |
| Red Hat Enterprise Linux AppStream E4S (v.8.6) | Fixed | RHSA-2025:21401 |
| Red Hat Enterprise Linux AppStream E4S (v.8.8) | Fixed | RHSA-2025:21400 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:21405 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:21406 |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Fixed | RHSA-2025:21403 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2025:21452 |
| Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) | Fixed | RHSA-2025:21402 |
| Red Hat Enterprise Linux AppStream TUS (v.8.6) | Fixed | RHSA-2025:21401 |
| Red Hat Enterprise Linux AppStream TUS (v.8.8) | Fixed | RHSA-2025:21400 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2025:21628 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2025:21462 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:21404 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2025:21404 |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-47151
- 2026-10-03 Alias added: GHSA-j9px-r24r-fm3p
References
More Entr'ouvert Lasso vulnerabilities
- TI-2015-01601 The prefix variable in the get_or_define_ns function in Lasso before commit… CVSS 3.0HIGH 7.5
- TI-2021-09336 Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature. CVSS 3.1HIGH 7.5
- TI-2025-29429 Memory leak in Entr'ouvert Lasso CVSS 3.1HIGH 7.5
- TI-2025-29376 Reachable assertion in Entr'ouvert Lasso CVSS 3.1HIGH 7.5
- TI-2025-29125 NULL pointer dereference in Entr'ouvert Lasso CVSS 3.1HIGH 7.5
- TI-2009-00048 Lasso 2.2.1 and earlier does not properly check the return value from the OpenSSL… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2025-47151 · CVE Program
- CVE-2025-47151 · NVD
- FIRST EPSS
- GHSA-j9px-r24r-fm3p · GitHub Advisory Database · CC BY 4.0
- CVE-2025-47151 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences