CVE-2024-26844 - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

References

Link	Providers
https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956
https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6
https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b
https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b
https://lore.kernel.org/linux-cve-announce/2024041716-CVE-2024-26844-c534@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-26844
https://www.cve.org/CVERecord?id=CVE-2024-26844

History

No history.

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-04-17T10:10:08.711Z

Updated: 2024-08-02T00:14:13.656Z

Reserved: 2024-02-19T14:20:24.182Z

Link: CVE-2024-26844

Vulnrichment

Updated: 2024-08-02T00:14:13.656Z

NVD

Status : Awaiting Analysis

Published: 2024-04-17T10:15:10.093

Modified: 2024-04-17T12:48:07.510

Link: CVE-2024-26844

Redhat

Severity : Low

Publid Date: 2024-04-17T00:00:00Z

Links: CVE-2024-26844 - Bugzilla

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