SB20260815258 - Out-of-bounds read in Linux kernel sunrpc xprtrdma

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Main Vulnerability Database SB20260815258

SB20260815258 - Out-of-bounds read in Linux kernel sunrpc xprtrdma

Published: August 15, 2026

Security Bulletin ID SB20260815258
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-72466)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read and improper resource management in rpcrdma_is_bcall() when processing a short or malformed reply. A remote attacker can send a specially crafted reply to cause a denial of service.

The issue can misclassify a reply as a backchannel call and orphan a persistently DMA-mapped receive buffer, which can drain the Receive queue and lead to RNR NAKs in the peer.


Remediation

Install update from vendor's website.

References