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CVE-2017-16939 is a use-after-free vulnerability in the Linux kernel IPsec/XFRM policy-dump implementation in net/xfrm/xfrm_user.c, affecting kernels before 4.13.11. When CONFIG_XFRM_USER is enabled, cleanup of an XFRM Netlink socket in xfrm_dump_policy_done can mishandle the lifetime of policy-dump state. A local process can trigger the flaw using a crafted SO_RCVBUF setsockopt call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel IPsec/XFRM use-after-free privilege-escalation vulnerability.
Linux kernel IPsec/XFRM use-after-free that can result in privilege escalation.
A Linux kernel IPsec/XFRM use-after-free vulnerability that can potentially enable privilege escalation.
A use-after-free vulnerability in the Linux kernel IPsec XFRM subsystem that can potentially enable 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.