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CVE-2026-31607 is a heap out-of-bounds write vulnerability in the Linux kernel USB/IP client. When processing a RET_SUBMIT response, usbip_pack_ret_submit() overwrites the URB's number_of_packets with an unvalidated network-supplied value. The replacement value becomes the loop bound in usbip_recv_iso() and usbip_pad_iso(), although the iso_frame_desc flexible array was allocated using the original CMD_SUBMIT packet count. A malicious USB/IP server can inflate the response packet count, causing usbip_recv_iso() to write beyond the allocated array. KASAN confirmed a four-byte write immediately beyond a 320-byte allocation on kernel 7.0.0-rc5.
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22 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the referenced CentOS 7/TuxCare advisory; no technical flaw details are provided.
A vulnerability tracked as CVE-2026-31607 affecting Unity Linux/UOS Server packages; the provided CVSS v3 vector characterizes it as a local, low-complexity issue requiring low privileges, with high confidentiality and availability impact and low integrity impact.
A Linux kernel USB/IP vulnerability caused by insufficient validation of number_of_packets in usbip_pack_ret_submit().
A Linux kernel vulnerability in usbip_pack_ret_submit() related to insufficient validation of number_of_packets.
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.