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NVD / CVE Program· CNA openssl

CVE-2025-15468: NULL dereference in SSL_CIPHER_find() function on unknown cipher ID

Noroxi assessment

Priority: Monitor (action score 23/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.81% (FIRST EPSS); higher than 57.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: OpenSSL OpenSSL 3.3.6, 3.4.4, 3.5.5; azl3 openvmm 0.2.0-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to OpenSSL OpenSSL 3.3.6, 3.4.4, 3.5.5; azl3 openvmm 0.2.0-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.9 · v3.1—No exploit Fix available
Published
Jan 27, 2026
Updated
Jun 17, 2026
EPSS
0.8% · 57th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-15468

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opensslopenssl

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openssl openssl3.3.0 and later · before 3.3.6
  • openssl openssl3.4.0 and later · before 3.4.4
  • openssl openssl3.5.0 and later · before 3.5.5
  • openssl openssl3.6.0 and later · before 3.6.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (openssl). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenSSL OpenSSL

    • 3.6.0 and later · before 3.6.1affected · semver
    • 3.5.0 and later · before 3.5.5affected · semver
    • 3.4.0 and later · before 3.4.4affected · semver
    • 3.3.0 and later · before 3.3.6affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10opensslbefore 1:3.5.1-7.el10_1.alma.11:3.5.1-7.el10_1.alma.1
AlmaLinux:10openssl-develbefore 1:3.5.1-7.el10_1.alma.11:3.5.1-7.el10_1.alma.1
AlmaLinux:10openssl-libsbefore 1:3.5.1-7.el10_1.alma.11:3.5.1-7.el10_1.alma.1
AlmaLinux:10openssl-perlbefore 1:3.5.1-7.el10_1.alma.11:3.5.1-7.el10_1.alma.1
AlmaLinux:9opensslbefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
AlmaLinux:9openssl-develbefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
AlmaLinux:9openssl-libsbefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
AlmaLinux:9openssl-perlbefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
Alpine:v3.20opensslfrom 3.3.0 · before 3.3.6-r03.3.6-r0
Alpine:v3.22opensslfrom 3.3.0 · before 3.5.5-r03.5.5-r0
Debian:13opensslbefore 3.5.4-1~deb13u23.5.4-1~deb13u2
Debian:14opensslbefore 3.5.5-13.5.5-1
openSUSE:Leap 16.0openssl-3before 3.5.0-160000.5.13.5.0-160000.5.1
openSUSE:Tumbleweedopenssl-3before 3.5.3-2.13.5.3-2.1
Red Hat:enterprise_linux:10.1opensslbefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-debuginfobefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-debugsourcebefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-develbefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-libsbefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-libs-debuginfobefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:10.1openssl-perlbefore 1:3.5.1-7.el10_11:3.5.1-7.el10_1
Red Hat:enterprise_linux:9::appstreamopenssl-debuginfobefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
Red Hat:enterprise_linux:9::appstreamopenssl-debugsourcebefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7
Red Hat:enterprise_linux:9::appstreamopenssl-develbefore 1:3.5.1-7.el9_71:3.5.1-7.el9_7

+17

Same product

openssl: all records

Other highest-scoring records for the same primary product.

  • CVE-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV
    90Now
  • CVE-2021-3711SM2 Decryption Buffer Overflow
    65This week
  • CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code
    65This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-9230Sep 30, 2025 · Out-of-bounds read & write in RFC 3211 KEK Unwrap
    30Monitor
  • ← EarlierCVE-2025-11187Jan 27, 2026 · Improper validation of PBMAC1 parameters in PKCS#12 MAC verification
    26Monitor
  • Later →CVE-2025-15469Jan 27, 2026 · 'openssl dgst' one-shot codepath silently truncates inputs >16MB
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenSSL OpenSSL3.3.6Vendor (CNA)
OpenSSL OpenSSL3.4.4Vendor (CNA)
OpenSSL OpenSSL3.5.5Vendor (CNA)
OpenSSL OpenSSL3.6.1Vendor (CNA)
azl3 openvmm 0.2.0-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
almalinux:openssl1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssl-devel1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssl-libs1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:openssl-perl1:3.5.1-7.el10_1.alma.1 · AlmaLinux:10Package registry (OSV)
alpine:openssl3.3.6-r0 · Alpine:v3.20Package registry (OSV)
debian:openssl3.5.4-1~deb13u2 · Debian:13Package registry (OSV)
opensuse:openssl-33.5.3-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:openssl1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-config-fips0:3.5.6-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssl-debuginfo1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-debugsource1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-devel1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-devel-engine0:3.5.6-0.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:openssl-libs1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-libs-debuginfo1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:openssl-perl1:3.5.1-7.el10_1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
rocky linux:openssl1:3.5.1-7.el10_1 · Rocky Linux:10Package registry (OSV)
suse:openssl-33.5.0-160000.5.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:openssl-3-livepatches0.3-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-694210 days apartNULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex function
    30Monitor
  • CVE-2026-2838870 days apartNULL Pointer Dereference When Processing a Delta CRL
    30Monitor
  • CVE-2026-2838970 days apartPossible NULL Dereference When Processing CMS KeyAgreeRecipientInfo
    30Monitor
  • CVE-2026-2839070 days apartPossible NULL Dereference When Processing CMS KeyTransportRecipientInfo
    30Monitor
  • CVE-2026-42764133 days apartNULL Pointer Dereference in QUIC Server Initial Packet Handling
    30Monitor
  • CVE-2026-42765133 days apartNULL Dereference in Certificate Verification with OCSP Checking
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records