CVE-2026-98775

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

nitro_enclaves: fix use-after-free on SLOT_ALLOC failure

When ne_create_vm_ioctl() fails the SLOT_ALLOC request after

anon_inode_getfile() has succeeded, the error path calls

fput(enclave_file) and then frees ne_enclave.

In normal userspace context, fput() defers the final __fput() via

task_work. ne_enclave_release() therefore runs after ne_enclave has

already been freed and dereferences ne_enclave->slot_uid, causing a

use-after-free: KASAN: slab-use-after-free in ne_enclave_release.

The enclave has no slot allocated and is not yet linked into the

enclaves list on this error path, so ne_enclave_release() is expected

to return early when slot_uid is zero. However, reading slot_uid

already accesses the freed object.

Clear enclave_file->private_data before fput() on the error path.

ne_enclave_release() then returns immediately when private_data is

NULL, leaving the ioctl error path as the sole owner of ne_enclave.

Th

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References