Linux Kernel up to 6.11.5 bpf_parse_param memory leak

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.11.5. This affects the function bpf_parse_param. Performing a manipulation results in memory leak. This vulnerability is identified as CVE-2024-50165. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.11.5. This affects the function bpf_parse_param. 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: bpf: Preserve param->string when parsing mount options In bpf_parse_param(), keep the value of param->string intact so it can be freed later. Otherwise, the kmalloc area pointed to by param->string will be leaked as shown below: unreferenced object 0xffff888118c46d20 (size 8): comm "new_name", pid 12109, jiffies 4295580214 hex dump (first 8 bytes): 61 6e 79 00 38 c9 5c 7e any.8.\~ backtrace (crc e1b7f876): [] kmemleak_alloc+0x4b/0x80 [] __kmalloc_node_track_caller_noprof+0x36e/0x4a0 [] memdup_user+0x32/0xa0 [] strndup_user+0x46/0x60 [] __x64_sys_fsconfig+0x368/0x3d0 [] x64_sys_call+0xff/0x9f0 [] do_syscall_64+0x3b/0xc0 [] entry_SYSCALL_64_after_hwframe+0x4b/0x53

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-50165 since 10/21/2024. 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 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 6.11.6 eliminates this vulnerability. Applying the patch 5d7a0a426540/1f97c03f43fa 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 (216493). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.11.0
• 6.11.1
• 6.11.2
• 6.11.3
• 6.11.4
• 6.11.5

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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