NULL pointer dereference in Linux kernel dma-buf driver

1) NULL pointer dereference

EUVDB-ID: #VU102150

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-56544

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the vmap_udmabuf(), release_udmabuf() and udmabuf_create() functions in drivers/dma-buf/udmabuf.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/1c0844c6184e658064e14c4335885785ad3bf84b
https://git.kernel.org/stable/c/2acc6192aa8570661ed37868c02c03002b1dc290
https://git.kernel.org/stable/c/85bb72397cb63649fe493c96e27e1d0e4ed2ff63
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.2

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.