CVE-2026-90191

CVE CVE-2026-90191EUVD EUVD-2026-81784Published 2026-09-17T16:07:12.000ZLast changed 2026-09-18T17:53:38.000ZCVSS 8.4

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: mailbox: riscv-sbi-mpxy: validate RPMI notification lengths The SBI return value controls how many bytes are copied from shared memory into the RPMI notification buffer. It is not validated against the negotiated shared-memory size before that copy. The event walker also uses a reversed loop condition and can inspect a short event record. Validate the complete notification length before copying it, iterate only while a full event header remains, and stop when a declared event payload extends beyond the copied notification data.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux bf3022a4eb119c6b4e3424d6b19d8bfdfbc9bb57 <c7bc5e7677bcda7a446d63b989cfaa3fe91d6b76; 6.18; bf3022a4eb119c6b4e3424d6b19d8bfdfbc9bb57 <11d5af151bcbe78f5a579e0faecd3be9cea0399a; patch: 7.2.6; patch: 6.18.52; bf3022a4eb119c6b4e3424d6b19d8bfdfbc9bb57 <cbc24bce70dfd91c7b2f53b4fa896e9a4b6d6a6b; patch: 0; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.