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CVE-2023-39193 is an out-of-bounds read vulnerability in the Linux kernel Netfilter Xtables SCTP packet-matching implementation. The SCTP match validation routine, sctp_mt_check(), fails to validate the flag_count field before match_flags() processes it, permitting a crafted SCTP xtables rule configuration to read beyond intended kernel-memory bounds. The affected functionality is associated with the xt_sctp kernel module.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel xtables SCTP out-of-bounds read vulnerability.
Linux kernel xtables SCTP out-of-bounds read in match_flags.
Linux kernel xtables SCTP out-of-bounds-read vulnerability.
Linux kernel Netfilter xtables SCTP out-of-bounds-read vulnerability.
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.