In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix reference count leak in bpf_prog_test_run_xdp()
syzbot is reporting
unregister_netdevice: waiting for sit0 to become free. Usage count = 2
problem. A debug printk() patch found that a refcount is obtained at
xdp_convert_md_to_buff() from bpf_prog_test_run_xdp().
According to commit ec94670fcb3b ("bpf: Support specifying ingress via
xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by
xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md().
Therefore, we can consider that the error handling path introduced by
commit 1c1949982524 ("bpf: introduce frags support to
bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().
CVSS
No CVSS.
References
Configurations
No configuration.
History
No history.
Information
Published : 2026-01-23 16:15
Updated : 2026-01-26 15:03
NVD link : CVE-2026-22994
Mitre link : CVE-2026-22994
CVE.ORG link : CVE-2026-22994
JSON object : View
Products Affected
No product.
CWE
No CWE.