Allocation of Resources Without Limits or Throttling in Linux kernel - CVE-2026-74713
Published: August 24, 2026
Vulnerability identifier: #VU144611
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74713
CWE-ID: CWE-770
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource management in vhost_iotlb_add_range_ctx() and related vhost IOTLB allocation paths when handling userspace- or guest-controlled IOTLB mapping requests. A local user can send crafted mapping updates that keep allocating IOTLB entries beyond the configured limit to cause a denial of service.
Non-retiring tables could continue allocating entries after reaching their configured limit, and full-range mappings are split into two IOTLB entries.
Affected software
Linux kernel
How to mitigate CVE-2026-74713
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3