Linux Kernel up to 6.7.10/6.8.1 kobject_add memory leak

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.7.10/6.8.1. This vulnerability affects the function kobject_add. Performing a manipulation results in memory leak. This vulnerability is reported as CVE-2024-26900. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.7.10/6.8.1. This affects the function kobject_add. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: md: fix kmemleak of rdev->serial If kobject_add() is fail in bind_rdev_to_array(), 'rdev->serial' will be alloc not be freed, and kmemleak occurs. unreferenced object 0xffff88815a350000 (size 49152): comm "mdadm", pid 789, jiffies 4294716910 hex dump (first 32 bytes): 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 00 ................ backtrace (crc f773277a): [] kmemleak_alloc+0x61/0xe0 [] __kmalloc_large_node+0x15e/0x270 [] __kmalloc_node.cold+0x11/0x7f [] kvmalloc_node+0x74/0x150 [] rdev_init_serial+0x67/0x170 [] mddev_create_serial_pool+0x62/0x220 [] bind_rdev_to_array+0x2af/0x630 [] md_add_new_disk+0x400/0x9f0 [] md_ioctl+0x15bf/0x1c10 [] blkdev_ioctl+0x191/0x3f0 [] vfs_ioctl+0x22/0x60 [] __x64_sys_ioctl+0xba/0xe0 [] do_syscall_64+0x71/0x150 [] entry_SYSCALL_64_after_hwframe+0x6c/0x74

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-26900 since 02/19/2024. The exploitability is told to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 210815 (RHEL 9 : kernel (RHSA-2024:9315)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.7.11, 6.8.2 or 6.9-rc1 eliminates this vulnerability. Applying the patch 6d32c832a885/4c1021ce46fc/6cf350658736 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (210815). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4
• 6.7.5
• 6.7.6
• 6.7.7
• 6.7.8
• 6.7.9
• 6.7.10
• 6.8.0
• 6.8.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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