# CVE-2022-50012: powerpc/64: Init jump labels before parse_early_param()

Status: published. Published: 2025-06-18. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

powerpc/64: Init jump labels before parse_early_param()

On 64-bit, calling jump_label_init() in setup_feature_keys() is too
late because static keys may be used in subroutines of
parse_early_param() which is again subroutine of early_init_devtree().

For example booting with "threadirqs":

  static_key_enable_cpuslocked(): static key '0xc000000002953260' used before call to jump_label_init()
  WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:166 static_key_enable_cpuslocked+0xfc/0x120
  ...
  NIP static_key_enable_cpuslocked+0xfc/0x120
  LR  static_key_enable_cpuslocked+0xf8/0x120
  Call Trace:
    static_key_enable_cpuslocked+0xf8/0x120 (unreliable)
    static_key_enable+0x30/0x50
    setup_forced_irqthreads+0x28/0x40
    do_early_param+0xa0/0x108
    parse_args+0x290/0x4e0
    parse_early_options+0x48/0x5c
    parse_early_param+0x58/0x84
    early_init_devtree+0xd4/0x518
    early_setup+0xb4/0x214

So call jump_label_init() just before parse_early_param() in
early_init_devtree().

[mpe: Add call trace to change log and minor wording edits.]

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8 (affected, git); ≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < 8f9357313cdcadb0a311b44c29d4eaccc7fa632f (affected, git); ≥ 91cc470e797828d779cd4c1efbe8519bcb358bae; < ca829e05d3d4f728810cc5e4b468d9ebc7745eb3 (affected, git). Source: CNA: Linux
- Linux / Linux: 5.15 (affected); ≥ 0; < 5.15 (unaffected, semver); ≥ 5.15.63; ≤ 5.15.* (unaffected, semver); ≥ 5.19.4; ≤ 5.19.* (unaffected, semver); ≥ 6.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.25% as of 2026-11-05; percentile 16.38%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8 (CNA: Linux)

- https://git.kernel.org/stable/c/8f9357313cdcadb0a311b44c29d4eaccc7fa632f (CNA: Linux)

- https://git.kernel.org/stable/c/ca829e05d3d4f728810cc5e4b468d9ebc7745eb3 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-50012; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-50012; retrieved 2026-11-05; source updated Not reported

Revision: 2f2399d61da0c85847778b3543bbb285cbc765137d522442ebe59c65eb599270

Canonical: https://y2.dev/cve/CVE-2022-50012

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