{"id":"CVE-2026-22994","state":"PUBLISHED","title":"bpf: Fix reference count leak in bpf_prog_test_run_xdp()","description":"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().","publishedAt":"2026-01-23T15:24:14.749Z","updatedAt":"2026-10-15T01:12:31.365Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1c194998252469cad00a08bd9ef0b99fd255c260","status":"affected","lessThan":"368569bc546d3368ee9980ba79fc42fdff9a3365","versionType":"git"},{"version":"1c194998252469cad00a08bd9ef0b99fd255c260","status":"affected","lessThan":"98676ee71fd4eafeb8be63c7f3f1905d40e03101","versionType":"git"},{"version":"1c194998252469cad00a08bd9ef0b99fd255c260","status":"affected","lessThan":"fb9ef40cccdbacce36029b305d0ef1e12e4fea38","versionType":"git"},{"version":"1c194998252469cad00a08bd9ef0b99fd255c260","status":"affected","lessThan":"737be05a765761d7d7c9f7fe92274bd8e6f6951e","versionType":"git"},{"version":"1c194998252469cad00a08bd9ef0b99fd255c260","status":"affected","lessThan":"ec69daabe45256f98ac86c651b8ad1b2574489a7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bpf/test_run.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.161","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.121","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.66","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.6","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bpf/test_run.c"]}],"references":["https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365","https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101","https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38","https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e","https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/22xxx/CVE-2026-22994.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-22994","state":"PUBLISHED","datePublished":"2026-01-23T15:24:14.749Z","dateUpdated":"2026-10-15T01:12:31.365Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.937Z"},"containers":{"cna":{"title":"bpf: Fix reference count leak in bpf_prog_test_run_xdp()","descriptions":[{"lang":"en","value":"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. 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