CVE-2026-22994
Full vulnerability record from the local CVENow database.
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().
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-23 16:15:55.490000
Last modified
2026-11-05 22:17:58.237000
View original CVE JSON
{
"id": "CVE-2026-22994",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-23T16:15:55.490",
"lastModified": "2026-11-05T22:17:58.237",
"vulnStatus": "Modified",
"cveTags": [],
"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. 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()."
},
{
"lang": "es",
"value": "Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\n\nbpf: Corregir fuga de contador de referencias en bpf_prog_test_run_xdp()\n\nsyzbot está reportando\n\nunregister_netdevice: esperando que sit0 quede libre. Recuento de uso = 2\n\nproblema. Un parche de depuración printk() encontró que se obtiene un contador de referencias en xdp_convert_md_to_buff() desde bpf_prog_test_run_xdp().\n\nSegún el commit ec94670fcb3b ('bpf: Soporte para especificar el ingreso a través del contexto xdp_md en BPF_PROG_TEST_RUN'), el contador de referencias obtenido por xdp_convert_md_to_buff() será liberado por xdp_convert_buff_to_md().\n\nPor lo tanto, podemos considerar que la ruta de manejo de errores introducida por el commit 1c1949982524 ('bpf: introducir soporte de fragmentos en bpf_prog_test_run_xdp()') olvidó llamar a xdp_convert_buff_to_md()."
}
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"privilegesRequired": "LOW",
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