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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-22994

bpf: Fix reference count leak in bpf_prog_test_run_xdp()

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Status
Published
Published
Updated
Assigning organization
Linux

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().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1c194998252469cad00a08bd9ef0b99fd255c260 to < 368569bc546d3368ee9980ba79fc42fdff9a3365affected
  • 1c194998252469cad00a08bd9ef0b99fd255c260 to < 98676ee71fd4eafeb8be63c7f3f1905d40e03101affected
  • 1c194998252469cad00a08bd9ef0b99fd255c260 to < fb9ef40cccdbacce36029b305d0ef1e12e4fea38affected
  • 1c194998252469cad00a08bd9ef0b99fd255c260 to < 737be05a765761d7d7c9f7fe92274bd8e6f6951eaffected
  • 1c194998252469cad00a08bd9ef0b99fd255c260 to < ec69daabe45256f98ac86c651b8ad1b2574489a7affected

Linux Linux

Default version status: affected

  • 5.18affected
  • 0 to < 5.18unaffected
  • 6.1.161 to ≤ 6.1.*unaffected
  • 6.6.121 to ≤ 6.6.*unaffected
  • 6.12.66 to ≤ 6.12.*unaffected
  • 6.18.6 to ≤ 6.18.*unaffected
  • 6.19 to ≤ *unaffected

References