Linux Kernel up to 6.12.5 reg_sr use after free

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.12.5. It has been declared as critical. This vulnerability affects unknown code of the component reg_sr. The manipulation results in use after free. This vulnerability is reported as CVE-2024-56652. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.12.5. Affected is some unknown processing of the component reg_sr. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/xe/reg_sr: Remove register pool That pool implementation doesn't really work: if the krealloc happens to move the memory and return another address, the entries in the xarray become invalid, leading to use-after-free later: BUG: KASAN: slab-use-after-free in xe_reg_sr_apply_mmio+0x570/0x760 [xe] Read of size 4 at addr ffff8881244b2590 by task modprobe/2753 Allocated by task 2753: kasan_save_stack+0x39/0x70 kasan_save_track+0x14/0x40 kasan_save_alloc_info+0x37/0x60 __kasan_kmalloc+0xc3/0xd0 __kmalloc_node_track_caller_noprof+0x200/0x6d0 krealloc_noprof+0x229/0x380 Simplify the code to fix the bug. A better pooling strategy may be added back later if needed. (cherry picked from commit e5283bd4dfecbd3335f43b62a68e24dae23f59e4)

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-56652 since 12/27/2024. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/12/2026).

The vulnerability scanner Nessus provides a plugin with the ID 230724 (Linux Distros Unpatched Vulnerability : CVE-2024-56652), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.6 eliminates this vulnerability. Applying the patch b0193a31a0ca5a0f9e60bb4a86537d46b98111b8/d7b028656c29b22fcde1c6ee1df5b28fbba987b5 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 (230724) and CERT Bund (WID-SEC-2024-3762). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Dell NetWorker
• Dell Avamar
• Red Hat OpenShift
• IBM QRadar SIEM
• Dell PowerProtect Data Domain
• Open Source Linux Kernel
• IBM DataPower Gateway
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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