Loading vulnerability…
CVE-2026-23270 is a use-after-free vulnerability in the Linux kernel networking scheduler's act_ct connection-tracking action. Packet classification can return TC_ACT_CONSUMED while the defragmentation engine still holds the current socket buffer. When act_ct is attached to an unsupported queueing discipline that does not correctly handle this return value, the packet can be freed before the defragmentation engine accesses it again. The vulnerability can cause a kernel crash and may permit privilege escalation. The fix restricts act_ct bindings to clsact/ingress queueing disciplines and shared blocks, preserving egress attachment through clsact.
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.
34 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability in Linux kernel traffic control involving act_ct and packet defragmentation. Unsupported queueing disciplines may mishandle TC_ACT_CONSUMED, allowing the defragmentation engine to access an already-freed packet. The fix restricts act_ct binding to clsact/ingress queueing disciplines and shared blocks. The reference assigns CVSS v3 severity of 7.8, with local access and low privileges required and potential high confidentiality, integrity, and availability impacts.
A use-after-free vulnerability in Linux kernel traffic control can occur when act_ct is attached to queueing disciplines that do not correctly handle TC_ACT_CONSUMED. The fix restricts act_ct binding to clsact/ingress qdiscs and shared blocks. The advisory identifies affected Google COS kernel packages and assigns a CVSS v3 base score of 7.8, with local access and low privileges required.
A Linux kernel use-after-free vulnerability in traffic control (act_ct) that may lead to denial of service or privilege escalation.
A Linux kernel use-after-free vulnerability in traffic control (act_ct) that may lead to denial of service or privilege escalation.
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.