github - ghsa-6j6x-q3pw-5hr9

ghsa-6j6x-q3pw-5hr9

Vulnerability from github

Published

2024-04-17 12:32

Modified

2024-04-17 12:32

Details

In the Linux kernel, the following vulnerability has been resolved:

block: Fix WARNING in _copy_from_iter

Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space.

Thus the iovec is used in both directions.

Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

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{
  "affected": [],
  "aliases": [
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    "severity": null
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix WARNING in _copy_from_iter\n\nSyzkaller reports a warning in _copy_from_iter because an\niov_iter is supposedly used in the wrong direction. The reason\nis that syzcaller managed to generate a request with\na transfer direction of SG_DXFER_TO_FROM_DEV. This instructs\nthe kernel to copy user buffers into the kernel, read into\nthe copied buffers and then copy the data back to user space.\n\nThus the iovec is used in both directions.\n\nDetect this situation in the block layer and construct a new\niterator with the correct direction for the copy-in.",
  "id": "GHSA-6j6x-q3pw-5hr9",
  "modified": "2024-04-17T12:32:03Z",
  "published": "2024-04-17T12:32:03Z",
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cve-2024-26844

Vulnerability from cvelistv5

Published

2024-04-17 10:10

Modified

2024-11-05 09:16

Severity ?

Summary

block: Fix WARNING in _copy_from_iter

References

▼	URL	Tags
	https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b
	https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956
	https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b
	https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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