CVE-2024-26840

Advisory lineage Upstream: 0 Downstream: 36
Analyzed
Published: 17 Apr 2024, 10:10
Last modified:11 May 2026, 20:05

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Apr 2024, 10:10
Published
Vulnerability first disclosed
11 May 2026, 20:05
Last Modified
Vulnerability information updated

Description

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): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] 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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • linux•linux

    ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < cb5466783793e66272624cf71925ae1d1ba32083 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 037d5a949b0455540ef9aab34c10ddf54b65d285 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 43eccc5823732ba6daab2511ed32dfc545a666d8 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 94965be37add0983672e48ecb33cdbda92b62579 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 8b218e2f0a27a9f09428b1847b4580640b9d1e58 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 38e921616320d159336b0ffadb09e9fb4945c7c3 | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < 9cac69912052a4def571fedf1cb9bb4ec590e25a | ≥ 9ae326a69004dea8af2dae4fde58de27db700a8d, < e21a2f17566cbd64926fb8f16323972f7a064444 | 2.6.30

  • linux•linux_kernel

    ≥ 2.6.30, < 4.19.309 | ≥ 4.20, < 5.4.271 | ≥ 5.5, < 5.10.212 | ≥ 5.11, < 5.15.151 | ≥ 5.16, < 6.1.80 | ≥ 6.2, < 6.6.19 | ≥ 6.7, < 6.7.7 | 6.8:rc1 | 6.8:rc2 | 6.8:rc3 | 6.8:rc4 | 6.8:rc5

References (10)