fkie_cve-2023-52928
Vulnerability from fkie_nvd
Published
2025-03-27 17:15
Modified
2025-03-28 18:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Skip invalid kfunc call in backtrack_insn The verifier skips invalid kfunc call in check_kfunc_call(), which would be captured in fixup_kfunc_call() if such insn is not eliminated by dead code elimination. However, this can lead to the following warning in backtrack_insn(), also see [1]: ------------[ cut here ]------------ verifier backtracking bug WARNING: CPU: 6 PID: 8646 at kernel/bpf/verifier.c:2756 backtrack_insn kernel/bpf/verifier.c:2756 __mark_chain_precision kernel/bpf/verifier.c:3065 mark_chain_precision kernel/bpf/verifier.c:3165 adjust_reg_min_max_vals kernel/bpf/verifier.c:10715 check_alu_op kernel/bpf/verifier.c:10928 do_check kernel/bpf/verifier.c:13821 [inline] do_check_common kernel/bpf/verifier.c:16289 [...] So make backtracking conservative with this by returning ENOTSUPP. [1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip invalid kfunc call in backtrack_insn\n\nThe verifier skips invalid kfunc call in check_kfunc_call(), which\nwould be captured in fixup_kfunc_call() if such insn is not eliminated\nby dead code elimination. However, this can lead to the following\nwarning in backtrack_insn(), also see [1]:\n\n  ------------[ cut here ]------------\n  verifier backtracking bug\n  WARNING: CPU: 6 PID: 8646 at kernel/bpf/verifier.c:2756 backtrack_insn\n  kernel/bpf/verifier.c:2756\n\t__mark_chain_precision kernel/bpf/verifier.c:3065\n\tmark_chain_precision kernel/bpf/verifier.c:3165\n\tadjust_reg_min_max_vals kernel/bpf/verifier.c:10715\n\tcheck_alu_op kernel/bpf/verifier.c:10928\n\tdo_check kernel/bpf/verifier.c:13821 [inline]\n\tdo_check_common kernel/bpf/verifier.c:16289\n  [...]\n\nSo make backtracking conservative with this by returning ENOTSUPP.\n\n  [1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Omite llamada kfunc no v\u00e1lida en backtrack_insn El verificador omite llamada kfunc no v\u00e1lida en check_kfunc_call(), que se capturar\u00eda en fixup_kfunc_call() si dicha insn no se elimina mediante la eliminaci\u00f3n de c\u00f3digo muerto. Sin embargo, esto puede generar la siguiente advertencia en backtrack_insn(), vea tambi\u00e9n [1]: ------------[ cortar aqu\u00ed ]------------ error de retroceso del verificador ADVERTENCIA: CPU: 6 PID: 8646 en kernel/bpf/verifier.c:2756 backtrack_insn kernel/bpf/verifier.c:2756 __mark_chain_precision kernel/bpf/verifier.c:3065 mark_chain_precision kernel/bpf/verifier.c:3165 adjust_reg_min_max_vals kernel/bpf/verifier.c:10715 check_alu_op kernel/bpf/verifier.c:10928 do_check kernel/bpf/verifier.c:13821 [en l\u00ednea] do_check_common kernel/bpf/verifier.c:16289 [...] As\u00ed que haga que el retroceso sea conservador con esto devolviendo ENOTSUPP. [1] https://lore.kernel.org/bpf/CACkBjsaXNceR8ZjkLG=dT3P=4A8SBsg0Z5h5PWLryF5=ghKq=g@mail.gmail.com/"
    }
  ],
  "id": "CVE-2023-52928",
  "lastModified": "2025-03-28T18:11:49.747",
  "metrics": {},
  "published": "2025-03-27T17:15:42.230",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e2fac197de2c4c041bdd8982cffb104689113f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74eec8266f37aff609db6a2f2b093e56a11c28c4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3178e8a434b58678d99257c0387810a24042fb6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.