CVE - CVE-2024-47748

CVE-ID
CVE-2024-47748	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/02e9e9366fefe461719da5d173385b6685f70319 URL:https://git.kernel.org/stable/c/02e9e9366fefe461719da5d173385b6685f70319 MISC:https://git.kernel.org/stable/c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0 URL:https://git.kernel.org/stable/c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0 MISC:https://git.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2 URL:https://git.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2 MISC:https://git.kernel.org/stable/c/927a2580208e0f9b0b47b08f1c802b7233a7ba3c URL:https://git.kernel.org/stable/c/927a2580208e0f9b0b47b08f1c802b7233a7ba3c MISC:https://git.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0 URL:https://git.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0 MISC:https://git.kernel.org/stable/c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1 URL:https://git.kernel.org/stable/c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1 MISC:https://git.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717d URL:https://git.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717d
Assigning CNA
kernel.org
Date Record Created
20240930	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240930)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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