CVE-2015-1593

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2015-03-16 · updated 2026-06-17
Weakness: CWE-264

Description

The stack randomization feature in the Linux kernel before 3.19.1 on 64-bit platforms uses incorrect data types for the results of bitwise left-shift operations, which makes it easier for attackers to bypass the ASLR protection mechanism by predicting the address of the top of the stack, related to the randomize_stack_top function in fs/binfmt_elf.c and the stack_maxrandom_size function in arch/x86/mm/mmap.c.

Affected products

Linux kernel: through 3.18.9

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4e7c22d447bb6d7e37bfe39ff658486ae78e8d77
http://hmarco.org/bugs/linux-ASLR-integer-overflow.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
http://rhn.redhat.com/errata/RHSA-2015-1137.html
http://rhn.redhat.com/errata/RHSA-2015-1138.html
http://rhn.redhat.com/errata/RHSA-2015-1221.html
http://www.debian.org/security/2015/dsa-3170
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.1
http://www.openwall.com/lists/oss-security/2015/02/13/13
http://www.securityfocus.com/bid/72607
http://www.ubuntu.com/usn/USN-2560-1

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