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CVE-2023-2008 is an out-of-bounds memory-access vulnerability in the Linux kernel udmabuf driver, which provides user-space-mappable DMA buffers. The driver's fault handler does not adequately validate a user-supplied array index, allowing access beyond the bounds of an array. The resulting memory corruption condition can be leveraged for local privilege escalation and arbitrary code execution in kernel context.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a proof-of-concept exploit for CVE-2023-2008, a vulnerability in the udmabuf driver of the Linux kernel (fixed in 5.19-rc4). The exploit is implemented in C (exp.c) and is designed for local privilege escalation. It requires access to the /dev/udmabuf device, which is typically restricted to users in the 'kvm' group. The exploit works by heap spraying and manipulating kernel memory via the vulnerable device, ultimately allowing the attacker to install a root backdoor by modifying the contents of /etc/passwd in memory and setting the SUID bit on the exploit binary. If successful, it spawns a root shell. The repository also includes a README.md with usage instructions and background information. No network endpoints are involved; the attack vector is purely local.
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Linux kernel vulnerability addressed by this kernel-rt update; no issue description is provided in the content.
An improper array-index validation flaw in the Linux kernel udmabuf component that can lead to local privilege escalation.
An improper array-index validation vulnerability in the Linux kernel udmabuf component that can lead to local privilege escalation.
A Linux kernel udmabuf array-index validation flaw that can lead to local privilege escalation, addressed by the Red Hat kpatch-patch security update.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.