High 8.8Published Sep 19, 2025

CVE-2025-39849wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()

Updated under an hour ago (Oct 27, 2026, 12:50 AM ET)

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It affects Linux and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from dd43f8f90206054e7da7593de0a334fb2cd0ea88 before 8e751d46336205abc259ed3990e850a9843fb649; from c38c701851011c94ce3be1ccb3593678d2933fd8 before e472f59d02c82b511bc43a3f96d62ed08bf4537f; from c38c701851011c94ce3be1ccb3593678d2933fd8 before 31229145e6ba5ace3e9391113376fa05b7831ede; from c38c701851011c94ce3be1ccb3593678d2933fd8 before 5cb7cab7adf9b1e6a99e2081b0e30e9e59d07523; from c38c701851011c94ce3be1ccb3593678d2933fd8 before 62b635dcd69c4fde7ce1de4992d71420a37e51e3; bf3c348c5fdcf00a7eeed04a1b83e454d2dca2e5; from 6.1.16 before 6.1.151; from 6.2.3 before 6.3	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
linux linux_kernel linux:linux_kernel	from 6.1.16 before 6.1.151; from 6.2.3 before 6.6.105; from 6.7 before 6.12.46; from 6.13 before 6.16.6; 6.17; 6.17; 6.17; 6.17	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/8e751d46336205abc259ed3990e850a9843fb649	patch
https://git.kernel.org/stable/c/e472f59d02c82b511bc43a3f96d62ed08bf4537f	patch
https://git.kernel.org/stable/c/31229145e6ba5ace3e9391113376fa05b7831ede	patch
https://git.kernel.org/stable/c/5cb7cab7adf9b1e6a99e2081b0e30e9e59d07523	patch
https://git.kernel.org/stable/c/62b635dcd69c4fde7ce1de4992d71420a37e51e3	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	mailing-list, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.