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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Redhat
  • Enterprise Linux

No data.

Package CPE Advisory Released Date
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10 cpe:/a:redhat:enterprise_linux:8::nfv RHSA-2024:5102 2024-08-08T00:00:00Z
kernel-0:4.18.0-553.16.1.el8_10 cpe:/o:redhat:enterprise_linux:8 RHSA-2024:5101 2024-08-08T00:00:00Z
References
Link Providers
https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 cve-icon cve-icon cve-icon
https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444 cve-icon cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html cve-icon cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html cve-icon cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024041715-CVE-2024-26840-057d@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2024-26840 cve-icon
https://www.cve.org/CVERecord?id=CVE-2024-26840 cve-icon
History

Thu, 08 Aug 2024 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:8::nfv
cpe:/o:redhat:enterprise_linux:8
Vendors & Products Redhat
Redhat enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-04-17T10:10:06.180Z

Updated: 2024-08-02T00:14:13.702Z

Reserved: 2024-02-19T14:20:24.182Z

Link: CVE-2024-26840

cve-icon Vulnrichment

Updated: 2024-08-02T00:14:13.702Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-17T10:15:09.910

Modified: 2024-06-27T13:15:56.713

Link: CVE-2024-26840

cve-icon Redhat

Severity : Low

Publid Date: 2024-04-17T00:00:00Z

Links: CVE-2024-26840 - Bugzilla