Linux Kernel up to 6.11.4 sysfs-kunit.h damon_sysfs_test_add_targets memory leak

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.11.4. Impacted is the function damon_sysfs_test_add_targets in the library mm/damon/tests/sysfs-kunit.h. The manipulation results in memory leak. This vulnerability is identified as CVE-2024-50068. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.11.4. Affected is the function damon_sysfs_test_add_targets in the library mm/damon/tests/sysfs-kunit.h. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets() The sysfs_target->regions allocated in damon_sysfs_regions_alloc() is not freed in damon_sysfs_test_add_targets(), which cause the following memory leak, free it to fix it. unreferenced object 0xffffff80c2a8db80 (size 96): comm "kunit_try_catch", pid 187, jiffies 4294894363 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 0): [] kmemleak_alloc+0x34/0x40 [] __kmalloc_cache_noprof+0x26c/0x2f4 [] damon_sysfs_test_add_targets+0x1cc/0x738 [] kunit_try_run_case+0x13c/0x3ac [] kunit_generic_run_threadfn_adapter+0x80/0xec [] kthread+0x2e8/0x374 [] ret_from_fork+0x10/0x20

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-50068 since 10/21/2024. The exploitability is told to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 216493 (Ubuntu 24.10 : Linux kernel vulnerabilities (USN-7276-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.11.5 eliminates this vulnerability. Applying the patch 05d43455f6bf/2d6a1c835685 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 databases at Tenable (216493), EUVD (EUVD-2024-44743) and CERT Bund (WID-SEC-2024-3289). Once again VulDB remains the best source for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Open Source eCryptfs
• NetApp ActiveIQ Unified Manager
• SUSE openSUSE
• RESF Rocky Linux
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.11.0
• 6.11.1
• 6.11.2
• 6.11.3
• 6.11.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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