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CVE-2024-26844 Detail

Description

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.


Severity



CVSS 4.0 Severity and Metrics:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

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Hyperlink Resource
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

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-26844
NVD Published Date:
04/17/2024
NVD Last Modified:
04/17/2024
Source:
kernel.org