CVE-2022-50210

MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

MEDIUM

5.5

CVSS Score

Published: June 18, 2025 at 11:03 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: MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected, cpu_max_bits_warn() generates a runtime warning similar as below while we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit) instead of NR_CPUS to iterate CPUs. [ 3.052463] ------------[ cut here ]------------ [ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0 [ 3.070072] Modules linked in: efivarfs autofs4 [ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052 [ 3.084034] Hardware name: Loongson Loongson-3A4000-7A1000-1w-V0.1-CRB/Loongson-LS3A4000-7A1000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V2.0.04082-beta7 04/27 [ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000 [ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430 [ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff [ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890 [ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa [ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000 [ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000 [ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000 [ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286 [ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c [ 3.195868] ... [ 3.199917] Call Trace: [ 3.203941] [<98000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9800000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<980000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9800000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9800000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<98000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<98000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<98000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<98000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9800000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9800000000202fe4>] handle_syscall+0xc4/0x160 [ 3.281824] ---[ end trace 8b484262b4b8c24c ]---

Affected

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

Linux Kernel · Linux

95%

v < 4.9.3262.6.29 ≤ v < 4.14.2912.6.29 ≤ v < 4.19.2562.6.29 ≤ v < 4.9.3262.6.29 ≤ v < 5.10.1372.6.29 ≤ v < 5.15.612.6.29 ≤ v < 5.18.182.6.29 ≤ v < 5.19.22.6.29 ≤ v < 5.4.2112.6.29 ≤ v < 6.04.10 ≤ v < 4.14.2914.15 ≤ v < 4.19.2564.20 ≤ v < 5.4.2115.11 ≤ v < 5.15.615.16 ≤ v < 5.18.185.19 ≤ v < 5.19.25.5 ≤ v < 5.10.1372.6.29ae7a47e72e1a0b5e2b46d1596bc2c22942a73023

Vendor states this is fixed in 274e44e2123417e0924c90d4b4531913b5f3aa2e (fixed)

Vendor states this is fixed in 4cb392956ae392aec4aa06e661a0bb9146b0bace (fixed)

Vendor states this is fixed in 7d305823e02217b29d41fca67e3cef87fd7bd688 (fixed)

Vendor states this is fixed in 807adf6ffa8c3beedcd63b20f5a59c7d061df7d2 (fixed)

Vendor states this is fixed in 8916ec149c79cb21f5454fa7840ad96f99cf51cf (fixed)

Vendor states this is fixed in 98aaa511957667ba26d6dabe28dfa210a8f53a63 (fixed)

Vendor states this is fixed in d3ac4e47510ec0753ebe1e418a334ad202784aa8 (fixed)

Vendor states this is fixed in e1a534f5d074db45ae5cbac41d8912b98e96a006 (fixed)

Vendor states this is fixed in e41db8a9ce696a3382a4f098878fd4d14bccd201 (fixed)

Vendor states this is fixed in 2.6.29 (unaffected)

Vendor states this is fixed in 4.14.291 (unaffected)

Vendor states this is fixed in 4.19.256 (unaffected)