CVE-2021-47604 (GCVE-0-2021-47604)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:54 – Updated: 2025-05-04 07:14
VLAI?
Title
vduse: check that offset is within bounds in get_config()
Summary
In the Linux kernel, the following vulnerability has been resolved: vduse: check that offset is within bounds in get_config() This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value. I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c8a6153b6c59d95c0e091f053f6f180952ade91e , < ebbbc5fea3f648175df1aa3f127c78eb0252cc2a (git)
Affected: c8a6153b6c59d95c0e091f053f6f180952ade91e , < dc1db0060c02d119fd4196924eff2d1129e9a442 (git)
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    Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.11 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • 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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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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