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CVE-2026-31411 is an untrusted pointer dereference vulnerability in the Linux kernel ATM networking subsystem. The sendmsg() → vcc_sendmsg() → sigd_send() path reads a VCC pointer from userspace-controlled msg->vcc and dereferences it without validating that it identifies an existing VCC. During normal operation, the ATM signaling daemon returns pointers previously supplied by the kernel through sigd_enq(). A malicious signaling daemon can instead submit an arbitrary pointer, causing a kernel crash. The flaw was introduced in Linux 2.6.12.
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What an attacker gets, and what they’ve been doing with it.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel ATM networking vulnerability that can cause a crash due to an unvalidated VCC pointer in sigd_send().
A Linux kernel network/ATM flaw in sigd_send() caused by an unvalidated vcc pointer, which can result in a crash and availability impact.
A Linux kernel ATM networking flaw that can cause a crash because sigd_send() uses an unvalidated vcc pointer.
Linux kernel ATM networking flaw in sigd_send() caused by an unvalidated VCC pointer, which can lead to a crash.
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.