CVE-2026-98046

/// Technical description

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

bpf: Mark bpf_btf_find_by_name_kind() as sleepable

When bpf_btf_find_by_name_kind() finds a type in module BTF, it

returns a new BTF object fd through __btf_new_fd(). This reaches

anon_inode_getfd(), which can sleep while allocating or expanding the

current task fd table.

The helper prototype does not set might_sleep, so the verifier allows

the helper in non-sleepable contexts such as BPF timer callbacks. The

fd allocation can then sleep in softirq context and install the fd into

the interrupted task.

Mark the helper as sleepable. This preserves calls from the main body

of a sleepable syscall program while rejecting calls from its

non-sleepable regions.

/// 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