CVE-2016-8650

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-11-28 · updated 2026-06-17
Weakness: CWE-20

Description

The mpi_powm function in lib/mpi/mpi-pow.c in the Linux kernel through 4.8.11 does not ensure that memory is allocated for limb data, which allows local users to cause a denial of service (stack memory corruption and panic) via an add_key system call for an RSA key with a zero exponent.

Affected products

Linux kernel: through 4.8.11

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f5527fffff3f002b0a6b376163613b82f69de073
http://seclists.org/fulldisclosure/2016/Nov/76
http://www.openwall.com/lists/oss-security/2016/11/24/8
http://www.securityfocus.com/bid/94532
http://www.securitytracker.com/id/1037968
https://access.redhat.com/errata/RHSA-2017:0931
https://access.redhat.com/errata/RHSA-2017:0932
https://access.redhat.com/errata/RHSA-2017:0933
https://access.redhat.com/errata/RHSA-2018:1854
https://bugzilla.redhat.com/show_bug.cgi?id=1395187
https://github.com/torvalds/linux/commit/f5527fffff3f002b0a6b376163613b82f69de073
https://source.android.com/security/bulletin/2017-03-01.html

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