Loading vulnerability…
CVE-2025-40170 is a synchronization flaw in the Linux kernel networking subsystem involving accesses to the destination entry's device pointer, dst->dev, without required read-copy-update (RCU) protection. The fix protects accesses in sk_setup_caps() and sk_dst_gso_max_size(), uses dst_dev_rcu() in ip6_dst_mtu_maybe_forward() and ip_dst_mtu_maybe_forward(), and uses dst_dev_net_rcu() in ip4_dst_hoplimit(). Improperly protected device-pointer accesses may cause memory-safety issues, race-triggered instability, or denial of service.
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 Linux kernel networking vulnerability addressed by using dst_dev_rcu() in sk_setup_caps(). The content does not specify its impact. Affected Rocky Linux 10.1 kernel packages have security updates under CIQ advisory crlsa-2026_1690.
A Linux kernel networking vulnerability involving insufficient RCU protection when accessing destination-device information. The fix adds protected access in several networking functions. The advisory identifies affected Google kernel packages and assigns a CVSS v3 base score of 7.8, with local access and low privileges required.
A Linux kernel networking vulnerability involving accesses to dst->dev that require RCU protection. The fix also updates related IPv4 and IPv6 helper functions. The advisory rates it High, with a CVSS v3 score of 7.8 and a vector indicating local exploitation requiring low privileges, with potentially high confidentiality, integrity, and availability impacts. Echo linux packages should be updated to version 6.12.69-1 or later.
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.