-- CVE-2024-26817

I found a security vulnerability in AMD KFD in the following file drivers/gpu/drm/amd/amdkfd/kfd_chardev.c, the ioctl identifier is AMDKFD_IOC_GET_PROCESS_APERTURES_NEW. In the function kfd_ioctl_get_process_apertures_new, the user-provided data of args->num_of_nodes will be multiplied and passed directly to kzalloc and that could lead to integer overflow in some platforms. That would allocate a small size and potentially corrupt the heap just after in the same function.

Description

In the Linux kernel, the following vulnerability has been resolved:

amdkfd: use calloc instead of kzalloc to avoid integer overflow

This uses calloc instead of doing the multiplication which might overflow.

The Linux kernel CVE team has assigned CVE-2024-26817 to this issue.

Affected and fixed versions

Fixed in 4.19.312 with commit e6721ea845fc
Fixed in 5.4.274 with commit 8b0564704255
Fixed in 5.10.215 with commit fcbd99b3c733
Fixed in 5.15.155 with commit cbac7de1d990
Fixed in 6.1.86 with commit e6768c6737f4
Fixed in 6.6.27 with commit 315eb3c2df7e
Fixed in 6.8.6 with commit 0c33d1115394

Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-26817 will be updated if fixes are backported, please check that for the most up to date information about this issue.

Affected files

The file(s) affected by this issue are: drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

Mitigation

The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/e6721ea845fcb93a764a92bd40f1afc0d6c69751 https://git.kernel.org/stable/c/8b0564704255c6b3c6a7188e86939f754e1577c0 https://git.kernel.org/stable/c/fcbd99b3c73309107e3be71f20dff9414df64f91 https://git.kernel.org/stable/c/cbac7de1d9901521e78cdc34e15451df3611f2ad https://git.kernel.org/stable/c/e6768c6737f4c02cba193a3339f0cc2907f0b86a https://git.kernel.org/stable/c/315eb3c2df7e4cb18e3eacfa18a53a46f2bf0ef7 https://git.kernel.org/stable/c/0c33d11153949310d76631d8f4a4736519eacd3a