'openssl dgst' one-shot codepath silently truncates inputs >16MB
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 10 fixed, 7 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-347.
Summary
Issue summary: The 'openssl dgst' command-line tool silently truncates input data to 16MB when using one-shot signing algorithms and reports success instead of an error. Impact summary: A user signing or verifying files larger than 16MB with one-shot algorithms (such as Ed25519, Ed448, or ML-DSA) may believe the entire file is authenticated while trailing data beyond 16MB remains unauthenticated. When the 'openssl dgst' command is used with algorithms that only support one-shot signing (Ed25519, Ed448, ML-DSA-44, ML-DSA-65, ML-DSA-87), the input is buffered with a 16MB limit. If the input exceeds this limit, the tool silently truncates to the first 16MB and continues without signaling an error, contrary to what the documentation states. This creates an integrity gap where trailing bytes can be modified without detection if both signing and verification are performed using the same affected codepath. The issue affects only the command-line tool behavior. Verifiers that process the full message using library APIs will reject the signature, so the risk primarily affects workflows that both sign and verify with the affected 'openssl dgst' command. Streaming digest algorithms for 'openssl dgst' and library users are unaffected. The FIPS modules in 3.5 and 3.6 are not affected by this issue, as the command-line tools are outside the OpenSSL FIPS module boundary. OpenSSL 3.5 and 3.6 are vulnerable to this issue. OpenSSL 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA OpenSSL (OpenSSL) Fixed in 3.6.1, 3.5.5
Red Hat 12 advisories
- RHSA-2026:82857 Released 2026-10-14 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-bundle
- RHSA-2026:82372 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
- RHSA-2026:82354 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
Show 9 more Red Hat advisories
- RHSA-2026:82347 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.18.2
- Cert Manager support for Red Hat OpenShift release 1.18 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
- RHSA-2026:7261 Released 2026-04-09 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images openssl-3.5.6-0.1.hum1@aarch64, openssl-3.5.6-0.1.hum1@src, openssl-3.5.6-0.1.hum1@x86_64 +10
- RHSA-2026:4943 Released 2026-03-18 · Red Hat rating ImportantRed Hat Update Infrastructure 5.1 security update
- Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
- RHSA-2026:3228 Released 2026-02-24 · Red Hat rating ImportantCost Management Metrics Operator Update
- Cost Management 4 registry.redhat.io/costmanagement/costmanagement-metrics-rhel9-operator
- RHSA-2026:2563 Released 2026-02-11 · Red Hat rating ImportantRed Hat Update Infrastructure 5 security update
- Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9, registry.redhat.io/rhui5/installer-rhel9 +1
- RHSA-2026:2485 Released 2026-02-10 · Red Hat rating ImportantInsights proxy Container Image
- Red Hat Insights proxy 1.5 registry.redhat.io/insights-proxy/insights-proxy-container-rhel9
- RHSA-2026:1736 Released 2026-02-02 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2026:1473 Released 2026-01-28 · Red Hat rating Importantopenssl security update
- Red Hat Enterprise Linux AppStream (v. 9) openssl-devel-1:3.5.1-7.el9_7, openssl-perl-1:3.5.1-7.el9_7
- Red Hat Enterprise Linux BaseOS (v. 9) openssl-1:3.5.1-7.el9_7, openssl-libs-1:3.5.1-7.el9_7
- RHSA-2026:1472 Released 2026-01-28 · Red Hat rating Importantopenssl security update
- Red Hat Enterprise Linux AppStream (v. 10) openssl-devel-1:3.5.1-7.el10_1, openssl-perl-1:3.5.1-7.el10_1
- Red Hat Enterprise Linux BaseOS (v. 10) openssl-1:3.5.1-7.el10_1, openssl-libs-1:3.5.1-7.el10_1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
OpenSSL — openssl-library.org/news/secadv/20260127.txt
12 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsingPriority CRITICAL 85
- TI-2025-10249 Improper validation of PBMAC1 parameters in PKCS#12 MAC verificationPriority MEDIUM 62
- TI-2025-42864 NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex functionPriority MEDIUM 41
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Core Services | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Cert Manager support for Red Hat OpenShift release 1.18 | Fixed | RHSA-2026:82347, RHSA-2026:82354, RHSA-2026:82372, RHSA-2026:82857 |
| Cost Management 4 | Fixed | RHSA-2026:3228 |
| Red Hat Discovery 2 | Fixed | RHSA-2026:1736 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:1472 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:1473 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:1472 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:1473 |
| Red Hat Hardened Images | Fixed | RHSA-2026:7261 |
| Red Hat Insights proxy 1.5 | Fixed | RHSA-2026:2485 |
| Red Hat Update Infrastructure 5 | Fixed | RHSA-2026:2563, RHSA-2026:4943 |
Not affected: 2 products
- Cost Management 4
- Red Hat Update Infrastructure 5
Timeline
- 2026-10-02 Threatist record created from CVE-2025-15469
- 2026-10-03 Alias added: GHSA-v2vr-926q-29fr
- 2026-10-14 Fix available: RHSA-2026:82372 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82354 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82347 · Red Hat
- 2026-10-15 Fix available: RHSA-2026:82857 · Red Hat
- 2026-10-16 Fix available: Cert Manager support for Red Hat OpenShift release 1.18 · Red Hat
References
Advisory 1
More Openssl vulnerabilities
- TI-2022-01915 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
- TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
- TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
- TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
- TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
- TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsing CVSS 3.1HIGH 8.8
Sources
- CVE-2025-15469 · CVE Program
- CVE-2025-15469 · NVD
- FIRST EPSS
- GHSA-v2vr-926q-29fr · GitHub Advisory Database · CC BY 4.0
- CVE-2025-15469 · 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