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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-31464 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done() A malicious or compromised VIO server can return a num_written value in the discover targets MAD response that exceeds max_targets. This value is stored directly in vhost->num_targets without validation, and is then used as the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which is only allocated for max_targets entries. Indices at or beyond max_targets access kernel memory outside the DMA-coherent allocation. The out-of-bounds data is subsequently embedded in Implicit Logout and PLOGI MADs that are sent back to the VIO server, leaking kernel memory. Fix by clamping num_written to max_targets before storing it.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/394a1cac3c12fdd7d77f19ccfd222ab5ff87ef89 kernel.org Patch 
https://git.kernel.org/stable/c/4ed727e35b0ab17d3eeeb1e8023768396e2be161 kernel.org Patch 
https://git.kernel.org/stable/c/61d099ac4a7a8fb11ebdb6e2ec8d77f38e77362f kernel.org Patch 
https://git.kernel.org/stable/c/786f10b1966e485046839f992e89f2c18cbd1983 kernel.org Patch 
https://git.kernel.org/stable/c/a007246cb6c9ebdc93dafbf63cc2d43d98f402cc kernel.org Patch 
https://git.kernel.org/stable/c/bae4df0a643fa7f84663473aa3082a9c2ed139db kernel.org Patch 
https://git.kernel.org/stable/c/d1466bf991b2343cf2ba8336e440c8faf3cbb780 kernel.org Patch 
https://git.kernel.org/stable/c/d842348f8a00d5b1d7358f207eb34ffcf5b16df3 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-31464
NVD Published Date:
04/22/2026
NVD Last Modified:
05/07/2026
Source:
kernel.org