CVE-2024-57917

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Source
https://cve.org/CVERecord?id=CVE-2024-57917
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57917.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-57917
Downstream
Related
Published
2025-01-19T11:52:37Z
Modified
2026-09-09T03:30:52Z
Summary
topology: Keep the cpumask unchanged when printing cpumap
Details

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

topology: Keep the cpumask unchanged when printing cpumap

During fuzz testing, the following warning was discovered:

different return values (15 and 11) from vsnprintf("%*pbl ", ...)

test:keyward is WARNING in kvasprintf WARNING: CPU: 55 PID: 1168477 at lib/kasprintf.c:30 kvasprintf+0x121/0x130 Call Trace: kvasprintf+0x121/0x130 kasprintf+0xa6/0xe0 bitmap_print_to_buf+0x89/0x100 core_siblings_list_read+0x7e/0xb0 kernfs_file_read_iter+0x15b/0x270 new_sync_read+0x153/0x260 vfs_read+0x215/0x290 ksys_read+0xb9/0x160 do_syscall_64+0x56/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2

The call trace shows that kvasprintf() reported this warning during the printing of core_siblings_list. kvasprintf() has several steps:

(1) First, calculate the length of the resulting formatted string.

(2) Allocate a buffer based on the returned length.

(3) Then, perform the actual string formatting.

(4) Check whether the lengths of the formatted strings returned in steps (1) and (2) are consistent.

If the core_cpumask is modified between steps (1) and (3), the lengths obtained in these two steps may not match. Indeed our test includes cpu hotplugging, which should modify core_cpumask while printing.

To fix this issue, cache the cpumask into a temporary variable before calling cpumap_print_{list, cpumask}_to_buf(), to keep it unchanged during the printing process.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/57xxx/CVE-2024-57917.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
bb9ec13d156e85dfd6a8afd0bb61ccf5736ed257
Fixed
1c7818e2746e747838a3de1687e89eac7b947f08
Fixed
ca47e933a900492d89dcf5db18a99c28bd4a742d
Fixed
b02cf1d27e460ab2b3e1c8c9ce472d562cad2e8d
Fixed
360596e7fe319a5db1b5fb34a3952862ae53c924
Fixed
cbd399f78e23ad4492c174fc5e6b3676dba74a52

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57917.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.15.0
Fixed
5.15.177
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.125
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.72
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.10

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57917.json"