Loading vulnerability…
CVE-2025-39864 is a use-after-free vulnerability in the Linux kernel cfg80211 Wi-Fi configuration subsystem, affecting BSS comparison handling in cmp_bss(). The flaw results from lifetime management of beacon-frame elements associated with hidden-SSID BSS entries. Under the affected bss_free() behavior, cfg80211_update_known_bss() could free final beacon-frame elements while those elements remained shared through the associated hidden_beacon_bss reference. The upstream correction frees the elements only when they are not shared through that reference.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free flaw in the Linux kernel cfg80211 Wi-Fi subsystem's cmp_bss() function.
Linux kernel cfg80211 Wi-Fi subsystem use-after-free vulnerability in cmp_bss().
A use-after-free vulnerability in the Linux kernel cfg80211 Wi-Fi subsystem's cmp_bss() handling, fixed by this kernel-rt update.
A use-after-free vulnerability in the Linux kernel cfg80211 Wi-Fi subsystem's cmp_bss() handling.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.