CVE-2025-39849

wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()

HIGH

7.8

CVSS Score

Published: September 19, 2025 at 03:26 PM UTC

Updated: October 19, 2026 at 09:10 PM UTC

3 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC CN 4100

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

6.1.16 ≤ v < 6.1.1516.13 ≤ v < 6.16.66.2.3 ≤ v < 6.6.1056.7 ≤ v < 6.12.466.1.16 6.17 6.17 rc1 6.17 rc2 6.17 rc3 6.17 rc4 6.2.3bf3c348c5fdcf00a7eeed04a1b83e454d2dca2e5c38c701851011c94ce3be1ccb3593678d2933fd8dd43f8f90206054e7da7593de0a334fb2cd0ea88

Vendor states this is fixed in 31229145e6ba5ace3e9391113376fa05b7831ede (fixed)

Vendor states this is fixed in 5cb7cab7adf9b1e6a99e2081b0e30e9e59d07523 (fixed)

Vendor states this is fixed in 62b635dcd69c4fde7ce1de4992d71420a37e51e3 (fixed)

Vendor states this is fixed in 8e751d46336205abc259ed3990e850a9843fb649 (fixed)

Vendor states this is fixed in e472f59d02c82b511bc43a3f96d62ed08bf4537f (fixed)

Vendor states this is fixed in 6.1.151 (unaffected)

Vendor states this is fixed in 6.12.46 (unaffected)

Vendor states this is fixed in 6.16.6 (unaffected)

Vendor states this is fixed in 6.17 (unaffected)

Vendor states this is fixed in 6.3 (unaffected)

Vendor states this is fixed in 6.6.105 (unaffected)

SIMATIC CN 4100 · Siemens