CVE-2026-93186

CVE-2026-93186 affects the Linux kernel CXL mailbox (cxl/mbox) subsystem. The CXL_MEM_SEND_COMMAND ioctl bounds the user-supplied in.size to the mailbox payload size but leaves out.size unbounded. The subsequent call to kvzalloc(out.size) in cxl_mbox_cmd_ctor() allows a user-controlled oversized ...

EUVD-2026-82294

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Clamp mailbox output allocation to the payload size CXLMEMSENDCOMMAND bounds the user's in.size to the mailbox payload size but leaves out.size unbounded, then cxlmboxcmdctor calls kvzallocout.size. A large out.size...

CVE-2026-93097

CVE-2026-93097 affects the Linux kernel CXL/mbox subsystem's poison list handling. A CXL device that returns count == 0 with CXL_POISON_FLAG_MORE set on every iteration causes an infinite do/while loop while holding poison.mutex . This hangs the sysfs-triggered poison scan thread and blocks all s...

EUVD-2026-82205

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Break poison list loop on an empty payload A device that returns count == 0 with CXLPOISONFLAGMORE set on every iteration never advances nrrecords, so the maxerrors guard never trips and the do/while loops forever while...

CVE-2026-23327

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: validate payload size before accessing contents in cxlpayloadfromuserallowed cxlpayloadfromuserallowed casts and dereferences the input payload without first verifying its size. When a raw mailbox command is sent with a...

CVE-2026-23327 cxl/mbox: validate payload size before accessing contents in cxl_payload_from_user_allowed()

In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: validate payload size before accessing contents in cxlpayloadfromuserallowed cxlpayloadfromuserallowed casts and dereferences the input payload without first verifying its size. When a raw mailbox command is sent with a...