{"id":"CVE-2026-22994","title":"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","summary":"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 debu…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.18, < 6.1.161","linux_kernel >= 6.2, < 6.6.121","linux_kernel >= 6.7, < 6.12.66","linux_kernel >= 6.13, < 6.18.6","linux_kernel = 6.19"],"patched":["linux_kernel 6.18.6"],"published":"2026-01-23","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:39.027","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-22994","references":[{"url":"https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.0014,"epssPercentile":0.03345,"ingestedAt":"2026-09-08T15:33:26.994Z","slug":"CVE-2026-22994","body":"## Overview\n\nIn 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().\n\n## Affected\n\n- `linux_kernel >= 5.18, < 6.1.161`\n- `linux_kernel >= 6.2, < 6.6.121`\n- `linux_kernel >= 6.7, < 6.12.66`\n- `linux_kernel >= 6.13, < 6.18.6`\n- `linux_kernel = 6.19`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.18.6`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221593,"id":"CVE-2026-22994","ts":1792035284863,"field":"cvss","old":null,"new":"5.5"},{"seq":221592,"id":"CVE-2026-22994","ts":1792035284863,"field":"severity","old":"none","new":"medium"}]}