Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.18, < 6.1.161 |
References
- https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365Patch
- https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951ePatch
- https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101Patch
- https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7Patch
- https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38Patch
FAQ
What is CVE-2026-22994?
CVE-2026-22994 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 f...
How severe is CVE-2026-22994?
CVE-2026-22994 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-22994?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.