CVE-2024-26840

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Source
https://cve.org/CVERecord?id=CVE-2024-26840
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26840.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-26840
Downstream
Related
Published
2024-04-17T10:10:06Z
Modified
2026-08-12T03:30:30Z
Summary
cachefiles: fix memory leak in cachefiles_add_cache()
Details

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

cachefiles: fix memory leak in cachefiles_add_cache()

The following memory leak was reported after unbinding /dev/cachefiles:

================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [] kmem_cache_alloc+0x2d5/0x370 [] prepare_creds+0x26/0x2e0 [] cachefiles_determine_cache_security+0x1f/0x120 [] cachefiles_add_cache+0x13c/0x3a0 [] cachefiles_daemon_write+0x146/0x1c0 [] vfs_write+0xcb/0x520 [] ksys_write+0x69/0xf0 [] do_syscall_64+0x72/0x140 [] entry_SYSCALL_64_after_hwframe+0x6e/0x76

Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26840.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
9ae326a69004dea8af2dae4fde58de27db700a8d
Fixed
cb5466783793e66272624cf71925ae1d1ba32083
Fixed
037d5a949b0455540ef9aab34c10ddf54b65d285
Fixed
43eccc5823732ba6daab2511ed32dfc545a666d8
Fixed
94965be37add0983672e48ecb33cdbda92b62579
Fixed
8b218e2f0a27a9f09428b1847b4580640b9d1e58
Fixed
38e921616320d159336b0ffadb09e9fb4945c7c3
Fixed
9cac69912052a4def571fedf1cb9bb4ec590e25a
Fixed
e21a2f17566cbd64926fb8f16323972f7a064444

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26840.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.30
Fixed
4.19.309
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.271
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.212
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.151
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.80
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.19
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.7.7

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26840.json"