SB2026100713 - Use-after-free in Linux kernel sw rxe driver

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Main Vulnerability Database SB2026100713

SB2026100713 - Use-after-free in Linux kernel sw rxe driver

Published: October 7, 2026

Security Bulletin ID SB2026100713
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-98360)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a use-after-free in the kernel.

The vulnerability exists due to a use-after-free in the RDMA/rxe multicast-group handling code when a failed multicast-address operation frees a group that remains published in the multicast-group tree. A local user can request a subsequent attachment to the same multicast group to trigger a use-after-free in the kernel.

This path is reachable through ATTACH_MCAST on a UD queue pair. The initial rxe_mcast_add() failure can occur when the backing network device has been removed or dev_mc_add() returns an error.


Remediation

Install update from vendor's website.

References