CVE-2015-3194

CVE-2015-3194 is a high-severity vulnerability in Openssl with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 44% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-476.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 44% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-476
• Affected product: Openssl
• Published: 2015-12-06
• Last modified: 2026-06-17

Description

crypto/rsa/rsa_ameth.c in OpenSSL 1.0.1 before 1.0.1q and 1.0.2 before 1.0.2e allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an RSA PSS ASN.1 signature that lacks a mask generation function parameter.

Frequently asked questions

What is CVE-2015-3194?

crypto/rsa/rsa_ameth.c in OpenSSL 1.0.1 before 1.0.1q and 1.0.2 before 1.0.2e allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an RSA PSS ASN.1 signature that lacks a mask generation function parameter.

How severe is CVE-2015-3194?

CVE-2015-3194 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2015-3194 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 44% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3194?

CVE-2015-3194 primarily affects Openssl. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-3194?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-3194 published?

CVE-2015-3194 was published on 2015-12-06 and last updated on 2026-06-17.

References

• http://fortiguard.com/advisory/openssl-advisory-december-2015
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
• http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
• http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173801.html
• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00053.html
• http://lists.opensuse.org/opensuse-updates/2015-12/msg00070.html
• http://lists.opensuse.org/opensuse-updates/2015-12/msg00071.html
• http://lists.opensuse.org/opensuse-updates/2015-12/msg00087.html
• http://marc.info/?l=bugtraq&m=145382583417444&w=2
• http://openssl.org/news/secadv/20151203.txt
• http://rhn.redhat.com/errata/RHSA-2015-2617.html
• http://rhn.redhat.com/errata/RHSA-2016-2957.html
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl
• http://www.debian.org/security/2015/dsa-3413
• http://www.fortiguard.com/advisory/openssl-advisory-december-2015
• http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
• http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
• http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
• http://www.securityfocus.com/bid/78623
• http://www.securityfocus.com/bid/91787
• http://www.securitytracker.com/id/1034294
• http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583
• http://www.ubuntu.com/usn/USN-2830-1
• https://bugzilla.redhat.com/show_bug.cgi?id=1288320
• https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
• https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=c394a488942387246653833359a5c94b5832674e
• https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=d8541d7e9e63bf5f343af24644046c8d96498c17

Affected products (30)

• cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1f:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1g:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1h:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1i:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1j:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1k:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1l:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1m:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1n:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1o:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.1p:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:*
• cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:*
• cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*

More vulnerabilities in Openssl

• CVE-2009-3245 — Critical (CVSS 10.0): OpenSSL before 0.9.8m does not check for a NULL return value from bn_wexpand function calls in (1) crypto/bn/bn_div.c,…
• CVE-2006-3738 — Critical (CVSS 10.0): Buffer overflow in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier…
• CVE-2026-31789 — Critical (CVSS 9.8): Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer…
• CVE-2022-2274 — Critical (CVSS 9.8): The OpenSSL 3.0.4 release introduced a serious bug in the RSA implementation for X86_64 CPUs supporting the AVX512IFMA…
• CVE-2021-3711 — Critical (CVSS 9.8): In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt().…
• CVE-2016-6309 — Critical (CVSS 9.8): statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote…

All CVEs affecting Openssl →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

• CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
• CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
• CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
• CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
• CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
• CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

• 218.4.91.163 (ipv4-addr)
• 200.77.172.159 (ipv4-addr)
• 200.196.50.91 (ipv4-addr)
• 166.62.41.190 (ipv4-addr)
• 50.62.22.47 (ipv4-addr)
• 191.101.33.225 (ipv4-addr)
• 122.3.106.113 (ipv4-addr)