{"id":"DEBIAN-CVE-2026-80781","details":"In the Linux kernel, the following vulnerability has been resolved:  HID: core: fix OOB read of field-\u003eusage in hid_set_field()  hid_set_field() hands field-\u003eusage + offset to hid_dump_input() before the guard that bounds offset:  \thid_dump_input(field-\u003ereport-\u003edevice, field-\u003eusage + offset, value);  \tif (offset \u003e= field-\u003ereport_count) { \t\thid_err(...); \t\treturn -1; \t}  Under CONFIG_DEBUG_FS hid_dump_input() dereferences that pointer, with buf = hid_resolv_usage(usage-\u003ehid, NULL).  The usage[] array is allocated inline with the hid_field in hid_register_field() and holds field-\u003emaxusage entries, so an offset past it reads off the end of the kvzalloc()ed allocation and into a neighbouring object.  Had the guard run first, offset \u003c report_count \u003c= maxusage would already have confined the pointer to the array.  A caller supplies such an offset today.  picolcd_fb_send_tile() validates only report-\u003emaxfield before issuing hid_set_field(report-\u003efield[0], 11 + i, ...) for i = 0..31, so its offsets are fixed at 11..42 and are never checked against the bound field.  When the device registers that field with fewer usages, the framebuffer deferred-io work drives the read on every tile.  KASAN reports a 4-byte slab-out-of-bounds read in hid_dump_input() below hid_set_field(), and the same boot logs \"offset (1) exceeds report_count (1)\" from the guard that runs only afterwards.  Move the hid_dump_input() call below the guard.  Because field-\u003emaxusage \u003e= field-\u003ereport_count, the guard then establishes that field-\u003eusage + offset lies inside the array before it is dereferenced, for every caller and without changing behaviour on the valid path.  Discovered by XBOW, triaged by Baul Lee \u003cbaul.lee@xbow.com\u003e","modified":"2026-09-19T22:01:06.223238702Z","published":"2026-09-04T16:18:03.867Z","upstream":["CVE-2026-80781"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-80781"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.187-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.180-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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