CVE-2024-47748 (GCVE-0-2024-47748)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:14 – Updated: 2025-11-03 22:21
VLAI?
Title
vhost_vdpa: assign irq bypass producer token correctly
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 927a2580208e0f9b0b47b08f1c802b7233a7ba3c (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < ec5f1b54ceb23475049ada6e7a43452cf4df88d1 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < ca64edd7ae93402af2596a952e0d94d545e2b9c0 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < fae9b1776f53aab93ab345bdbf653b991aed717d (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 7cf2fb51175cafe01df8c43fa15a06194a59c6e2 (git)
Affected: 2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60 , < 02e9e9366fefe461719da5d173385b6685f70319 (git)
Create a notification for this product.
    Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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