Issue summary: If an application using the SSL_CIPHER_find() function in a QUIC protocol client or server receives an unknown cipher suite from the peer, a NULL dereference occurs. Impact summary: A NULL pointer dereference leads to abnormal termination of the running process causing Denial of Service. Some applications call SSL_CIPHER_find() from the client_hello_cb callback on the cipher ID received from the peer. If this is done with an SSL object implementing the QUIC protocol, NULL pointer dereference will happen if the examined cipher ID is unknown or unsupported. As it is not very common to call this function in applications using the QUIC protocol and the worst outcome is Denial of Service, the issue was assessed as Low severity. The vulnerable code was introduced in the 3.2 version with the addition of the QUIC protocol support. The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue, as the QUIC implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue. OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Conclusion & alert: CVE-2025-15468 is rated Moderate Risk (41.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.75%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.02% | 0.75% | +0.73% |
| 2 | 2026-03-21 | 0.05% | 0.02% | -0.03% |
| 3 | 2026-02-28 | — | 0.05% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-15468: 1 source package rows (openssl); 59 state rows across 5 repos (3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 5, open 54. | https://security.alpinelinux.org/vuln/CVE-2025-15468 |
debian
|
unimportant | CVE-2025-15468 unimportant priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-15468 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2025-15468 |
suse
|
high | CVE-2025-15468 severity important: SUSE including 310 source package names (16.3-1.20:libopenssl-3-fips-provider-3.5.0-160000.5.1, 16.3-1.20:libopenssl3-3.5.0-160000.5.1, …), 758 product×package rows across 92 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sles/16.0/toolbox, … (92 product lines)): Known Not Affected 328, Known Affected 231, Fixed 191, First Fixed 8. | https://www.suse.com/security/cve/CVE-2025-15468/ |
ubuntu
|
low | CVE-2025-15468 low priority: Ubuntu including 4 source packages (edk2, nodejs, openssl, openssl1.0), 32 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): not-affected 18, needs-triage 5, DNE 4, ignored 2, released 2, needed 1. | https://ubuntu.com/security/CVE-2025-15468 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| openssl | openssl | >= 3.3.0, < 3.3.6 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.4.0, < 3.4.4 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.5.0, < 3.5.5 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.6.0, < 3.6.1 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |