Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4, < 5.4.299 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/26e84445f02ce6b2fe5f3e0e28ff7add77f35e08Patch
- https://git.kernel.org/stable/c/5b7ae04969f822283a95c866967e42b4d75e0eefPatch
- https://git.kernel.org/stable/c/6854476d9e1aeaaf05ebc98d610061c2075db07dPatch
- https://git.kernel.org/stable/c/912c4b66bef713a20775cfbf3b5e9bd71525c716Patch
- https://git.kernel.org/stable/c/a8bb681e879ca3c9f722aa08d3d7ae41c42a8807Patch
- https://git.kernel.org/stable/c/a97a9791e455bb0cd5e7a38b5abcb05523d4e21cPatch
- https://git.kernel.org/stable/c/b7d08929178c16398278613df07ad65cf63cce9dPatch
- https://git.kernel.org/stable/c/ff040562c10a540b8d851f7f4145fa112977f853Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing ListThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html
FAQ
What is CVE-2025-39864?
CVE-2025-39864 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 hid...
How severe is CVE-2025-39864?
CVE-2025-39864 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-39864?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.