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CVE-2009-1897 is a local privilege-escalation vulnerability in the Linux kernel TUN/TAP subsystem affecting Linux kernel 2.6.30 and 2.6.30.1. In tun_chr_poll, the tun pointer is dereferenced before it is checked for NULL. When the kernel is built without GCC's -fno-delete-null-pointer-checks option, compiler optimization can remove the later NULL check. A local user can trigger the condition through operations involving /dev/net/tun, including mapping it, and exploit a mapped zero page to turn the NULL-pointer dereference into privilege escalation.
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No valid public exploits. Mallory filtered out 2 candidates 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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.