CVE-2026-22994 (GCVE-0-2026-22994)

Vulnerability from cvelistv5 – Published: 2026-01-23 15:24 – Updated: 2026-01-23 15:24
VLAI?
Title
bpf: Fix reference count leak in bpf_prog_test_run_xdp()
Summary
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1c194998252469cad00a08bd9ef0b99fd255c260 , < 368569bc546d3368ee9980ba79fc42fdff9a3365 (git)
Affected: 1c194998252469cad00a08bd9ef0b99fd255c260 , < 98676ee71fd4eafeb8be63c7f3f1905d40e03101 (git)
Affected: 1c194998252469cad00a08bd9ef0b99fd255c260 , < fb9ef40cccdbacce36029b305d0ef1e12e4fea38 (git)
Affected: 1c194998252469cad00a08bd9ef0b99fd255c260 , < 737be05a765761d7d7c9f7fe92274bd8e6f6951e (git)
Affected: 1c194998252469cad00a08bd9ef0b99fd255c260 , < ec69daabe45256f98ac86c651b8ad1b2574489a7 (git)
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    Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc6 , ≤ * (original_commit_for_fix)
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{
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          "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()."
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    "dateReserved": "2026-01-13T15:37:45.937Z",
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  }
}


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