SB20260815256 - Resource exhaustion in Linux kernel sunrpc xprtrdma
Published: August 15, 2026
Security Bulletin ID
SB20260815256
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-72464)
CWE-ID: CWE-400 - Resource exhaustion
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 improper resource management in rpcrdma_reply_handler() when processing malformed RPC/RDMA replies. A remote attacker can send a sustained stream of short replies or replies with an unrecognized RPC/RDMA version to cause a denial of service.
The issue can drain the client's posted Receive queue and stall the transport until reconnect.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/007b4da2f38dcc16a13265416f4ca9f179bab610
- https://git.kernel.org/stable/c/19fae02b272ee4bcdfb5db57f402d28f1697167a
- https://git.kernel.org/stable/c/4322fd9645ee769ad29ce5caea74a1cd9b17269d
- https://git.kernel.org/stable/c/abc011ddaf1617e3e82d8a1e87daa7ddbfb9bac5
- https://git.kernel.org/stable/c/d7c531ab477ae94fd03771d707fd29c787408039
- https://git.kernel.org/stable/c/ef6fb8a5c521f1a07f85202d13e8f2898f247362