Main Vulnerability Database Vulnerabilities #VU152147

Use-after-free in Linux kernel - CVE-2026-93250

Published: September 25, 2026

Vulnerability identifier: #VU152147

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93250

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to a use-after-free in vxlan_mdb_flush() when flushing VXLAN multicast database entries through RTM_DELMDB bulk requests. A local user can create an (S, G) entry before a (*, G) entry and issue a bulk RTM_DELMDB request to cause memory corruption.

The (*, G) entry must be added with NLM_F_REPLACE because adding the source otherwise fails with -EEXIST.

Affected software

Linux kernel

How to mitigate CVE-2026-93250

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3

External References

Related Security Bulletins