{"id":"CVE-2026-22994","summary":"bpf: Fix reference count leak in bpf_prog_test_run_xdp()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix reference count leak in bpf_prog_test_run_xdp()\n\nsyzbot is reporting\n\n  unregister_netdevice: waiting for sit0 to become free. Usage count = 2\n\nproblem. A debug printk() patch found that a refcount is obtained at\nxdp_convert_md_to_buff() from bpf_prog_test_run_xdp().\n\nAccording to commit ec94670fcb3b (\"bpf: Support specifying ingress via\nxdp_md context in BPF_PROG_TEST_RUN\"), the refcount obtained by\nxdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md().\n\nTherefore, we can consider that the error handling path introduced by\ncommit 1c1949982524 (\"bpf: introduce frags support to\nbpf_prog_test_run_xdp()\") forgot to call xdp_convert_buff_to_md().","modified":"2026-04-02T13:11:40.684209Z","published":"2026-01-23T15:24:14.749Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22994.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365"},{"type":"WEB","url":"https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22994.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22994"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1c194998252469cad00a08bd9ef0b99fd255c260"},{"fixed":"368569bc546d3368ee9980ba79fc42fdff9a3365"},{"fixed":"98676ee71fd4eafeb8be63c7f3f1905d40e03101"},{"fixed":"fb9ef40cccdbacce36029b305d0ef1e12e4fea38"},{"fixed":"737be05a765761d7d7c9f7fe92274bd8e6f6951e"},{"fixed":"ec69daabe45256f98ac86c651b8ad1b2574489a7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22994.json"}}],"schema_version":"1.7.5"}