CVE-2024-26840

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\ncachefiles: fix memory leak in cachefiles_add_cache()\nThe following memory leak was reported after unbinding /dev/cachefiles:\n==================================================================\nunreferenced object 0xffff9b674176e3c0 (size 192):\ncomm 'cachefilesd2', pid 680, jiffies 4294881224\nhex dump (first 32 bytes):\n01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\nbacktrace (crc ea38a44b):\n[] kmem_cache_alloc+0x2d5/0x370\n[] prepare_creds+0x26/0x2e0\n[] cachefiles_determine_cache_security+0x1f/0x120\n[] cachefiles_add_cache+0x13c/0x3a0\n[] cachefiles_daemon_write+0x146/0x1c0\n[] vfs_write+0xcb/0x520\n[] ksys_write+0x69/0xf0\n[] do_syscall_64+0x72/0x140\n[] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n==================================================================\nPut the reference count of cache_cred in cachefiles_daemon_unbind() to\nfix the problem. And also put cache_cred in cachefiles_add_cache() error\nbranch to avoid memory leaks.

See more information about CVE-2024-26840 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	None	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14