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CVE-2026-31411 is a Linux kernel ATM networking vulnerability in the signaling send path. The path from sendmsg() through vcc_sendmsg() to sigd_send() accepts a VCC pointer originating in userspace-controlled message data and dereferences it without establishing that it refers to a valid ATM VCC object. A local process acting as the ATM signaling daemon can return a forged pointer, causing an invalid kernel pointer dereference. The fix adds find_get_vcc(), which locates the supplied pointer in the VCC hash table and obtains a socket reference before use, preserving object lifetime during processing.
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10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel ATM networking flaw in sigd_send() caused by an unvalidated VCC pointer, which can lead to a crash.
A Linux kernel vulnerability in the net/atm subsystem involving an unvalidated vcc pointer in sigd_send() that can cause a crash.
A Linux kernel networking/ATM vulnerability that can cause a crash due to an unvalidated vcc pointer in sigd_send().
A Linux kernel ATM networking vulnerability that can cause a crash due to an unvalidated vcc pointer in sigd_send().
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.