Buffer overflow in Linux Kernel

CVE-2015-3331

The __driver_rfc4106_decrypt function in arch/x86/crypto/aesni-intel_glue.c in the Linux kernel before 3.19.3 does not properly determine the memory locations used for encrypted data, which allows context-dependent attackers to cause a denial of service (buffer overflow and system crash) or possibly execute arbitrary code by triggering a crypto API call, as demonstrated by use of a libkcapi test program with an AF_ALG(aead) socket.

Vulnerability class: Buffer Overflow

Published 2015-05-27 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.101 (95.5th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.101 · newest: 0.101 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 12.04
Debian Linux — versions 7.0, 8.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.ubuntu.com/usn/USN-2631-1 (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html (vendor-advisory, Third Party Advisory, Issue Tracking)
lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html (vendor-advisory, Third Party Advisory, Issue Tracking)
www.ubuntu.com/usn/USN-2632-1 (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html (vendor-advisory, Third Party Advisory, Issue Tracking)
github.com/torvalds/linux/commit/ccfe8c3f7e52ae83155cb038753f4c75b774ca8a (Third Party Advisory)
www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html (Third Party Advisory)
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3 (Vendor Advisory)
bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
www.debian.org/security/2015/dsa-3237 (vendor-advisory, Third Party Advisory)