CVE-2026-22994
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_net…
Impact
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().
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.18 before 6.1.161 from 6.2 before 6.6.121 from 6.7 before 6.12.66 from 6.13 before 6.18.6 Version 6.19 |
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365
- https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e
- https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101
- https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7
- https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html