CVE-2022-49034

sh: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK

MEDIUM

5.5

CVSS Score

Published: December 27, 2024 at 01:49 PM UTC

Updated: June 17, 2026 at 05:16 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: sh: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS are selected, cpu_max_bits_warn() generates a runtime warning similar as below when showing /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 [ 3.099465] 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] [<90000000002086d8>] show_stack+0x38/0x14c [ 3.210666] [<9000000000cf846c>] dump_stack_lvl+0x60/0x88 [ 3.217625] [<900000000023d268>] __warn+0xd0/0x100 [ 3.223958] [<9000000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc [ 3.231150] [<9000000000210220>] show_cpuinfo+0x5e8/0x5f0 [ 3.238080] [<90000000004f578c>] seq_read_iter+0x354/0x4b4 [ 3.245098] [<90000000004c2e90>] new_sync_read+0x17c/0x1c4 [ 3.252114] [<90000000004c5174>] vfs_read+0x138/0x1d0 [ 3.258694] [<90000000004c55f8>] ksys_read+0x70/0x100 [ 3.265265] [<9000000000cfde9c>] do_syscall+0x7c/0x94 [ 3.271820] [<9000000000202fe4>] 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 < 4.19.3252.6.12 ≤ v < 4.19.3252.6.12 ≤ v < 5.10.2312.6.12 ≤ v < 5.15.1742.6.12 ≤ v < 5.4.2872.6.12 ≤ v < 6.1.1202.6.12 ≤ v < 6.11.112.6.12 ≤ v < 6.12.22.6.12 ≤ v < 6.132.6.12 ≤ v < 6.6.644.20 ≤ v < 5.4.2875.11 ≤ v < 5.15.1745.16 ≤ v < 6.1.1205.5 ≤ v < 5.10.2316.12 ≤ v < 6.12.26.2 ≤ v < 6.6.646.7 ≤ v < 6.11.111da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2.6.12

Vendor states this is fixed in 09faf32c682ea4a547200b8b9e04d8b3c8e84b55 (fixed)

Vendor states this is fixed in 2b6b8e011fab680a223b5e07a3c64774156ec6fe (fixed)

Vendor states this is fixed in 39373f6f89f52770a5405d30dddd08a27d097872 (fixed)

Vendor states this is fixed in 3c891f7c6a4e90bb1199497552f24b26e46383bc (fixed)

Vendor states this is fixed in 701e32900683378d93693fec15d133e2c5f7ada2 (fixed)

Vendor states this is fixed in 77755dc95ff2f9a3e473acc1e039f498629949ea (fixed)

Vendor states this is fixed in 8fbb57eabfc8ae67115cb47f904614c99d626a89 (fixed)

Vendor states this is fixed in e2b91997db286a5dd3cca6d5d9c20004851f22eb (fixed)

Vendor states this is fixed in f8f26cf69003a37ffa947631fc0e6fe6daee624a (fixed)

Vendor states this is fixed in 2.6.12 (unaffected)

Vendor states this is fixed in 4.19.325 (unaffected)

Vendor states this is fixed in 5.10.231 (unaffected)