CVE-2022-50012

powerpc/64: Init jump labels before parse_early_param()

MEDIUM

5.5

CVSS Score

Published: June 18, 2025 at 11:01 AM UTC

Updated: June 17, 2026 at 05:22 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

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.]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v < 4.9.3264.10 ≤ v < 4.14.2914.15 ≤ v < 4.19.2564.20 ≤ v < 5.4.2115.11 ≤ v < 5.15.635.15 ≤ v < 5.15.635.15 ≤ v < 5.19.45.15 ≤ v < 6.05.16 ≤ v < 5.19.45.5 ≤ v < 5.10.1385.1591cc470e797828d779cd4c1efbe8519bcb358bae

Vendor states this is fixed in 8f9357313cdcadb0a311b44c29d4eaccc7fa632f (fixed)

Vendor states this is fixed in ca829e05d3d4f728810cc5e4b468d9ebc7745eb3 (fixed)

Vendor states this is fixed in e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 5.15.63 (unaffected)

Vendor states this is fixed in 5.19.4 (unaffected)

Vendor states this is fixed in 6.0 (unaffected)