CVE-2022-50296
UM: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: UM: 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 [ 3.099465] 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 ]---
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < dbd964a733db015bbb9dff592c259c736398140f
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 844748412be03a236dcf4a208b588162a275e189
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cd251d39b13485eb94ee65bb000d024e02c00e45
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 7efe61dc6aa45aab8a40e304fa2dae21e33b0db4
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 5177bdc38eaa1c1ca6302214ab06913540cd00a2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2e3863cc02c156b51b50592d43ffa6a13b680b0d
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 16c546e148fa6d14a019431436a6f7b4087dbccd
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 4.9.331 – ≤ 4.9.*
- unaffected 4.14.296 – ≤ 4.14.*
- unaffected 4.19.262 – ≤ 4.19.*
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (9)
- https://git.kernel.org/stable/c/8f96aa67c2ccbd7e41b8dc992b8d13cfe206d571 (opens in a new tab)
- https://git.kernel.org/stable/c/dbd964a733db015bbb9dff592c259c736398140f (opens in a new tab)
- https://git.kernel.org/stable/c/844748412be03a236dcf4a208b588162a275e189 (opens in a new tab)
- https://git.kernel.org/stable/c/cd251d39b13485eb94ee65bb000d024e02c00e45 (opens in a new tab)
- https://git.kernel.org/stable/c/6a73e6edcbf3cdd82796dcdf0c0f5fe5d91021af (opens in a new tab)
- https://git.kernel.org/stable/c/7efe61dc6aa45aab8a40e304fa2dae21e33b0db4 (opens in a new tab)
- https://git.kernel.org/stable/c/5177bdc38eaa1c1ca6302214ab06913540cd00a2 (opens in a new tab)
- https://git.kernel.org/stable/c/2e3863cc02c156b51b50592d43ffa6a13b680b0d (opens in a new tab)
- https://git.kernel.org/stable/c/16c546e148fa6d14a019431436a6f7b4087dbccd (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50296)Record last updated .