CVE-2015-5291 Memory corruption in n/a

What is CVE-2015-5291?

CVE-2015-5291 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 2 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap-based buffer overflow in PolarSSL 1.x before 1.2.17 and ARM mbed TLS (formerly PolarSSL) 1.3.x before 1.3.14 and 2.x before 2.1.2 allows remote SSL servers to cause a denial of service (client crash) and possibly execute arbitrary code via a long hostname to the server name indication (SNI) extension, which is not properly handled when creating a ClientHello message. NOTE: this identifier has been SPLIT per ADT3 due to different affected version ranges. See CVE-2015-8036 for the session ticket issue that was introduced in 1.3.0.

Weakness: CWE-119

Which versions are affected by CVE-2015-5291?

It affects 6 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Opensuse Opensuse, Polarssl Polarssl, Trustedfirmware Mbed Tls.

How do I fix CVE-2015-5291?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2015-5291 being exploited?

There is no known exploitation of CVE-2015-5291 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DLA-331-1, GHSA-hhcq-g9mx-qpfg.