Answer in brief
CVE-2026-90386 records a Unknown severity vulnerability in i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <5650b013e6bfc14c8b30be727f4a715b01860a08 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <3a1c35739efb69e8ec2a868113a0471a01bb8f29 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <111f559e5b6461f5f6977275716e6c5d1eb7ea27 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <754533e6169d1f10bdef7a6ba9bd7740b524e1d4 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <618dd640ded6b94bbdb79c798a901ec564797033 || >=1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef <038cf48b3170af26a70bf2dee4f8c3ac910f5176 | 5650b013e6bfc14c8b30be727f4a715b01860a08, 63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94, 3a1c35739efb69e8ec2a868113a0471a01bb8f29, 111f559e5b6461f5f6977275716e6c5d1eb7ea27, 754533e6169d1f10bdef7a6ba9bd7740b524e1d4, 9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c, 618dd640ded6b94bbdb79c798a901ec564797033, 038cf48b3170af26a70bf2dee4f8c3ac910f5176 |
| Linux/Linuxgeneric | 5.0 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices On an empty bus ENTDAA assigns nothing, so cmd->rx_len (the count of addresses left unassigned) equals master->maxdevs. The GENMASK() index master->maxdevs - cmd->rx_len - 1 then becomes -1, which trips up UBSAN. This happens every time on boot on a Gigabyte/AMD server: UBSAN: shift-out-of-bounds in drivers/i3c/master/dw-i3c-master.c:905:12 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 7 UID: 0 PID: 963 Comm: (udev-worker) Not tainted 7.0.11-200.fc44.x86_64 #1 PREEMPT(lazy) Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000, BIOS R32_F45 04/01/2026 Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x2b __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab dw_i3c_master_daa.cold+0x1b/0x96 [dw_i3c_master] i3c_master_do_daa_ext.part.0+0x3e/0xf0 [i3c] Skip the mask when no new device was assigned.
Quoted source text, attributed separately from HOL analysis.