CVE-2025-39864
What it is
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix use-after-free in cmp_bss() Following bss_free() quirk introduced in commit 776b3580178f ("cfg80211: track hidden SSID networks properly"), adjust cfg80211_update_known_bss() to free the last beacon frame elements only if they're not shared via the corresponding 'hidden_beacon_bss' pointer.
At a glance
- Exploitability
- Can be exploited from the same network segment without logging in. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-416 · Use after free
- Record status
- Modified
Affected
- Linux Kernel < 5.4.299
- Linux Kernel < 5.10.243
- Linux Kernel < 5.15.192
- Linux Kernel < 6.1.151
- Linux Kernel < 6.6.105
- Linux Kernel < 6.12.46
- Linux Kernel < 6.16.6
- Linux Kernel 6.17
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-39864.md and follow it. Check whether this project is affected by CVE-2025-39864. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/26e84445f02ce6b2fe5f3e0e28ff7add77f35e08
- https://git.kernel.org/stable/c/5b7ae04969f822283a95c866967e42b4d75e0eef
- https://git.kernel.org/stable/c/6854476d9e1aeaaf05ebc98d610061c2075db07d
- https://git.kernel.org/stable/c/912c4b66bef713a20775cfbf3b5e9bd71525c716
- https://git.kernel.org/stable/c/a8bb681e879ca3c9f722aa08d3d7ae41c42a8807
- https://git.kernel.org/stable/c/a97a9791e455bb0cd5e7a38b5abcb05523d4e21c
- https://git.kernel.org/stable/c/b7d08929178c16398278613df07ad65cf63cce9d
- https://git.kernel.org/stable/c/ff040562c10a540b8d851f7f4145fa112977f853
References
- https://git.kernel.org/stable/c/26e84445f02ce6b2fe5f3e0e28ff7add77f35e08
- https://git.kernel.org/stable/c/5b7ae04969f822283a95c866967e42b4d75e0eef
- https://git.kernel.org/stable/c/6854476d9e1aeaaf05ebc98d610061c2075db07d
- https://git.kernel.org/stable/c/912c4b66bef713a20775cfbf3b5e9bd71525c716
- https://git.kernel.org/stable/c/a8bb681e879ca3c9f722aa08d3d7ae41c42a8807
- https://git.kernel.org/stable/c/a97a9791e455bb0cd5e7a38b5abcb05523d4e21c
- https://git.kernel.org/stable/c/b7d08929178c16398278613df07ad65cf63cce9d
- https://git.kernel.org/stable/c/ff040562c10a540b8d851f7f4145fa112977f853
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html